openwrt/staging/blogic.git
5 years agohwmon: (nct7904) Fix incorrect SMI status register setting of LTD temperature and...
amy.shih [Thu, 12 Sep 2019 11:33:00 +0000 (11:33 +0000)]
hwmon: (nct7904) Fix incorrect SMI status register setting of LTD temperature and fan.

According to datasheet, the SMI status register setting of LTD
temperature is SMI_STS3, and the SMI status register setting
of fan is SMI_STS5 and SMI_STS6.

Signed-off-by: amy.shih <amy.shih@advantech.com.tw>
Link: https://lore.kernel.org/r/20190912113300.4714-1-Amy.Shih@advantech.com.tw
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
5 years agohwmon: (shtc1) add support for the SHTC3 sensor
Dan Robertson [Thu, 5 Sep 2019 01:45:53 +0000 (01:45 +0000)]
hwmon: (shtc1) add support for the SHTC3 sensor

Add support for the Sensirion SHTC3 humidity and temperature sensor to
the shtc1 module.

Signed-off-by: Dan Robertson <dan@dlrobertson.com>
Link: https://lore.kernel.org/r/20190905014554.21658-2-dan@dlrobertson.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
5 years agohwmon: (shtc1) fix shtc1 and shtw1 id mask
Dan Robertson [Thu, 5 Sep 2019 01:45:54 +0000 (01:45 +0000)]
hwmon: (shtc1) fix shtc1 and shtw1 id mask

Fix an error in the bitmaskfor the shtc1 and shtw1 bitmask used to
retrieve the chip ID from the ID register. See section 5.7 of the shtw1
or shtc1 datasheet for details.

Fixes: 1a539d372edd9832444e7a3daa710c444c014dc9 ("hwmon: add support for Sensirion SHTC1 sensor")
Signed-off-by: Dan Robertson <dan@dlrobertson.com>
Link: https://lore.kernel.org/r/20190905014554.21658-3-dan@dlrobertson.com
[groeck: Reordered to be first in series and adjusted accordingly]
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
5 years agohwmon: (lm75) Aproximate sample times to data-sheet values
Iker Perez del Palomar Sustatxa [Wed, 4 Sep 2019 11:56:21 +0000 (12:56 +0100)]
hwmon: (lm75) Aproximate sample times to data-sheet values

Current sample time values are over estimated, this patches applies
values closer to the ones defined in the data-sheets.

Signed-off-by: Iker Perez del Palomar Sustatxa <iker.perez@codethink.co.uk>
[groeck: resolved conflicts; use default conversion times]
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
5 years agohwmon: (w83793d) convert to use devm_i2c_new_dummy_device
Wolfram Sang [Tue, 3 Sep 2019 18:12:56 +0000 (20:12 +0200)]
hwmon: (w83793d) convert to use devm_i2c_new_dummy_device

And simplify the error handling.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Link: https://lore.kernel.org/r/20190903181256.13450-4-wsa+renesas@sang-engineering.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
5 years agohwmon: (w83792d) convert to use devm_i2c_new_dummy_device
Wolfram Sang [Tue, 3 Sep 2019 18:12:55 +0000 (20:12 +0200)]
hwmon: (w83792d) convert to use devm_i2c_new_dummy_device

And simplify the error handling.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Link: https://lore.kernel.org/r/20190903181256.13450-3-wsa+renesas@sang-engineering.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
5 years agohwmon: (w83791d) convert to use devm_i2c_new_dummy_device
Wolfram Sang [Tue, 3 Sep 2019 18:12:54 +0000 (20:12 +0200)]
hwmon: (w83791d) convert to use devm_i2c_new_dummy_device

And simplify the error handling.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Link: https://lore.kernel.org/r/20190903181256.13450-2-wsa+renesas@sang-engineering.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
5 years agohwmon: (as370-hwmon) fix devm_platform_ioremap_resource.cocci warnings
kbuild test robot [Tue, 3 Sep 2019 04:47:52 +0000 (06:47 +0200)]
hwmon: (as370-hwmon) fix devm_platform_ioremap_resource.cocci warnings

 Use devm_platform_ioremap_resource helper which wraps
 platform_get_resource() and devm_ioremap_resource() together.

Generated by: scripts/coccinelle/api/devm_platform_ioremap_resource.cocci

Fixes: 658e687b4218 ("hwmon: Add Synaptics AS370 PVT sensor driver")
CC: Jisheng Zhang <Jisheng.Zhang@synaptics.com>
Signed-off-by: kbuild test robot <lkp@intel.com>
Signed-off-by: Julia Lawall <julia.lawall@lip6.fr>
Reviewed-by: Jisheng Zhang <Jisheng.Zhang@synaptics.com>
Link: https://lore.kernel.org/r/alpine.DEB.2.21.1909030646180.3228@hadrien
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
5 years agohwmon: (lm75) Add support for writing sampling period on PCT2075
Guenter Roeck [Fri, 9 Aug 2019 02:28:51 +0000 (19:28 -0700)]
hwmon: (lm75) Add support for writing sampling period on PCT2075

For PCT7027, the sampling period is configured using a dedicated
register.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>
5 years agohwmon: (lm75) Add support for writing conversion time for TMP112
Guenter Roeck [Fri, 9 Aug 2019 02:12:55 +0000 (19:12 -0700)]
hwmon: (lm75) Add support for writing conversion time for TMP112

TMP112 uses an uncommon method to write the conversion time: its
configuration register is 16 bit wide, and the conversion time is
configured in its second byte.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>
5 years agohwmon: (lm75) Move updating the sample interval to its own function
Guenter Roeck [Thu, 8 Aug 2019 21:30:23 +0000 (14:30 -0700)]
hwmon: (lm75) Move updating the sample interval to its own function

We'll need per-chip handling for updating the sample interval.
To prepare for it, separate the code implementing it into its own
function.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>
5 years agohwmon: (lm75) Support configuring the sample time for various chips
Guenter Roeck [Thu, 8 Aug 2019 19:53:03 +0000 (12:53 -0700)]
hwmon: (lm75) Support configuring the sample time for various chips

The conversion (sample) time is configurable for several chips supported
by the lm75 driver. With the necessary infrastructure in place, enable
this support for all chips using the configuration register for this
purpose.

DS1775:
Conversion time: 187.5, 375, 750, 1500 ms
Sensor resolution:  9, 10, 11, 12 bit
DS75, STDS75:
Conversion time: 150, 300, 600, 1200 ms
Sensor resolution:  9, 10, 11, 12 bit
DS7505:
Conversion time: 25, 50, 100, 200 ms
Sensor resolution:  9, 10, 11, 12 bit
MCP980[0123]:
Conversion time: 75, 150, 300, 600 ms
Sensor resolution:  9, 10, 11, 12 bit
TMP100, TMP101:
Conversion time: 75, 150, 300, 600 ms
Sensor resolution:  9, 10, 11, 12 bit
TMP75, TMP105, TMP175, TMP275:
Conversion time: 38, 75, 150, 300 ms
Sensor resolution:  9, 10, 11, 12 bit

While doing this, it became obvious that the masks and values to set
the converion (sample) time is similar for all those chips, and that
other chips with configurable sample times will need separate code anyway.
For that reason, replace the sample_set_masks and sample_clr_mask
configuration parameters with a single array and with a constant.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>
5 years agohwmon: (nct7904) Fix incorrect temperature limitation register setting of LTD.
amy.shih [Mon, 18 Jun 2085 15:57:19 +0000 (15:57 +0000)]
hwmon: (nct7904) Fix incorrect temperature limitation register setting of LTD.

According to kernel hwmon sysfs-interface documentation, temperature
critical max value, typically greater than corresponding temp_max values.
Thus, reads the LTD_HV_HL (LTD HIGH VALUE HIGH LIMITATION) and LTD_LV_HL
(LTD LOW VALUE HIGH LIMITATION) for case hwmon_temp_crit and
hwmon_temp_crit_hyst. Reads the LTD_HV_LL (HIGH VALUE LOW LIMITATION)
and LTD_LV_LL (LOW VALUE LOW LIMITATION) for case hwmon_temp_max
and hwmon_temp_max_hyst.

Signed-off-by: amy.shih <amy.shih@advantech.com.tw>
Link: https://lore.kernel.org/r/20850618155720.24857-1-Amy.Shih@advantech.com.tw
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
5 years agohwmon: (as370-hwmon) Add DT bindings for Synaptics AS370 PVT
Jisheng Zhang [Tue, 27 Aug 2019 03:44:57 +0000 (03:44 +0000)]
hwmon: (as370-hwmon) Add DT bindings for Synaptics AS370 PVT

Add device tree bindings for Synaptics AS370 PVT sensors.

Signed-off-by: Jisheng Zhang <Jisheng.Zhang@synaptics.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20190827113337.384457f6@xhacker.debian
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
5 years agohwmon: Add Synaptics AS370 PVT sensor driver
Jisheng Zhang [Tue, 27 Aug 2019 03:44:15 +0000 (03:44 +0000)]
hwmon: Add Synaptics AS370 PVT sensor driver

Add a new driver for Synaptics AS370 PVT sensors. Currently, only
temperature is supported.

Signed-off-by: Jisheng Zhang <Jisheng.Zhang@synaptics.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20190827113259.4fb64a17@xhacker.debian
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
5 years agopmbus: (ibm-cffps) Add support for version 2 of the PSU
Eddie James [Fri, 30 Aug 2019 19:11:03 +0000 (14:11 -0500)]
pmbus: (ibm-cffps) Add support for version 2 of the PSU

Version 2 of the PSU supports a second page of data and changes the
format of the FW version. Use the devicetree binding to differentiate
between the version the driver should use.

Signed-off-by: Eddie James <eajames@linux.ibm.com>
Link: https://lore.kernel.org/r/1567192263-15065-4-git-send-email-eajames@linux.ibm.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
5 years agodt-bindings: hwmon: Document ibm,cffps2 compatible string
Eddie James [Fri, 30 Aug 2019 19:11:01 +0000 (14:11 -0500)]
dt-bindings: hwmon: Document ibm,cffps2 compatible string

Document the compatible string for version 2 of the IBM CFFPS PSU.

Signed-off-by: Eddie James <eajames@linux.ibm.com>
Link: https://lore.kernel.org/r/1567192263-15065-2-git-send-email-eajames@linux.ibm.com
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
5 years agohwmon: (iio_hwmon) Enable power exporting from IIO
Michal Simek [Thu, 22 Aug 2019 14:22:24 +0000 (16:22 +0200)]
hwmon: (iio_hwmon) Enable power exporting from IIO

There is no reason why power channel shouldn't be exported as is done for
voltage, current, temperature and humidity.

Power channel is available on iio ina226 driver.

Sysfs IIO documentation for power attribute added by commit 7c6d5c7ee883
("iio: Documentation: Add missing documentation for power attribute")
is declaring that value is in mili-Watts but hwmon interface is expecting
value in micro-Watts that's why there is a need for mili-Watts to
micro-Watts conversion.

Tested on Xilinx ZCU102 board.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Link: https://lore.kernel.org/r/db71f5ae87e4521a2856a1be5544de0b6cede575.1566483741.git.michal.simek@xilinx.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
5 years agodt-bindings: Add ipsps1 as a trivial device
John Wang [Mon, 19 Aug 2019 09:14:25 +0000 (17:14 +0800)]
dt-bindings: Add ipsps1 as a trivial device

The ipsps1 is an Inspur Power System power supply unit

Signed-off-by: John Wang <wangzqbj@inspur.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
5 years agohwmon: pmbus: Add Inspur Power System power supply driver
John Wang [Mon, 19 Aug 2019 09:15:09 +0000 (17:15 +0800)]
hwmon: pmbus: Add Inspur Power System power supply driver

Add the driver to monitor Inspur Power System power supplies
with hwmon over pmbus.

This driver adds sysfs attributes for additional power supply data,
including vendor, model, part_number, serial number,
firmware revision, hardware revision, and psu mode(active/standby).

Signed-off-by: John Wang <wangzqbj@inspur.com>
Reviewed-by: Joel Stanley <joel@jms.id.au>
Link: https://lore.kernel.org/r/20190819091509.29276-1-wangzqbj@inspur.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
5 years agohwmon/ltc2990: Generalise DT to fwnode support
Max Staudt [Mon, 19 Aug 2019 12:16:17 +0000 (14:16 +0200)]
hwmon/ltc2990: Generalise DT to fwnode support

ltc2990 will now use device_property_read_u32_array() instead of
of_property_read_u32_array() - allowing the use of software nodes
via fwnode_create_software_node().

This allows code using i2c_new_device() to specify a default
measurement mode for the LTC2990 via fwnode_create_software_node().

Signed-off-by: Max Staudt <max@enpas.org>
Reviewed-by: Geert Uytterhoeven <geert@linux-m68k.org>
Link: https://lore.kernel.org/r/20190819121618.16557-2-max@enpas.org
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
5 years agohwmon: (raspberrypi) update MODULE_AUTHOR() email address
Stefan Wahren [Tue, 13 Aug 2019 18:17:28 +0000 (20:17 +0200)]
hwmon: (raspberrypi) update MODULE_AUTHOR() email address

The email address listed in MODULE_AUTHOR() will be disabled in the
near future. Replace it with my private one.

Signed-off-by: Stefan Wahren <wahrenst@gmx.net>
Link: https://lore.kernel.org/r/1565720249-6549-2-git-send-email-wahrenst@gmx.net
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
5 years agohwmon: (lm75) Modularize lm75_write and make hwmon_chip writable
Iker Perez del Palomar Sustatxa [Thu, 8 Aug 2019 08:02:46 +0000 (09:02 +0100)]
hwmon: (lm75) Modularize lm75_write and make hwmon_chip writable

* Create two separate functions to write into hwmon_temp and hwmon_chip.
* Call the functions from lm75_write.
* Make hwm_chip writable if the chip supports more than one sample time.

Signed-off-by: Iker Perez del Palomar Sustatxa <iker.perez@codethink.co.uk>
Link: https://lore.kernel.org/r/20190808080246.8371-5-iker.perez@codethink.co.uk
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
5 years agohwmon: (lm75) Add new fields into lm75_params_
Iker Perez del Palomar Sustatxa [Thu, 8 Aug 2019 08:02:45 +0000 (09:02 +0100)]
hwmon: (lm75) Add new fields into lm75_params_

The new fields are included to prepare the driver for next patch. The
fields are:

* *resolutions: Stores all the supported resolutions by the device.
* num_sample_times: Stores the number of possible sample times.
* *sample_times: Stores all the possible sample times to be set.
* sample_set_masks: The set_masks for the possible sample times
* sample_clr_mask: Clear mask to set the default sample time.

Signed-off-by: Iker Perez del Palomar Sustatxa <iker.perez@codethink.co.uk>
Link: https://lore.kernel.org/r/20190808080246.8371-4-iker.perez@codethink.co.uk
[groeck: Minor structure documentation fixes]
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
5 years agohwmon: (lm75) Create function from code to write into registers
Iker Perez del Palomar Sustatxa [Thu, 8 Aug 2019 08:02:44 +0000 (09:02 +0100)]
hwmon: (lm75) Create function from code to write into registers

Wrap the existing code to write configurations into registers in
a function.

Added error handling to the function.

Signed-off-by: Iker Perez del Palomar Sustatxa <iker.perez@codethink.co.uk>
Link: https://lore.kernel.org/r/20190808080246.8371-3-iker.perez@codethink.co.uk
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
5 years agohwmon: (lm75) Create structure to save all the configuration parameters.
Iker Perez del Palomar Sustatxa [Thu, 8 Aug 2019 08:02:43 +0000 (09:02 +0100)]
hwmon: (lm75) Create structure to save all the configuration parameters.

* Add to lm75_data kind field to store the kind of device the driver is
  working with.
* Add an structure to store the configuration parameters of all the
  supported devices.
* Delete resolution_limits from lm75_data and include them in the structure
  described above.
* Add a pointer to the configuration parameters structure to be used as a
  reference to obtain the parameters.
* Delete switch-case approach to get the device configuration parameters.
* The structure is cleaner and easier to maintain.

Signed-off-by: Iker Perez del Palomar Sustatxa <iker.perez@codethink.co.uk>
Link: https://lore.kernel.org/r/20190808080246.8371-2-iker.perez@codethink.co.uk
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
5 years agohwmon: (nct7904) Add extra sysfs support for fan, voltage and temperature.
amy.shih [Wed, 7 Aug 2019 01:38:41 +0000 (01:38 +0000)]
hwmon: (nct7904) Add extra sysfs support for fan, voltage and temperature.

NCT-7904D also supports reading of channel limitation registers as well
as SMI status registers for fan, voltage and temperature monitoring.
It also supports reading the temperature sensor type (thermal diode,
thermistor, AMD SB-TSI or Intel PECI).

Add the following sysfs nodes:

-fan[1-*]_min
-fan[1-*]_alarm
-in[1-*]_min
-in[1-*]_max
-in[1-*]_alarm
-temp[1-*]_max
-temp[1-*]_max_hyst
-temp[1-*]_emergency
-temp[1-*]_emergency_hyst
-temp[1-*]_alarm
-temp[1-*]_type

Signed-off-by: Amy Shih <amy.shih@advantech.com.tw>
Link: https://lore.kernel.org/r/20190807013842.24451-1-Amy.Shih@advantech.com.tw
[groeck: Clarified description]
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
5 years agohwmon: w83795: Fan control option isn't that dangerous
Jean Delvare [Tue, 6 Aug 2019 08:21:23 +0000 (10:21 +0200)]
hwmon: w83795: Fan control option isn't that dangerous

I have been using SENSORS_W83795_FANCTRL for several years and never
had any problem. When the driver was added, I had not tested that
part of the driver yet so I wanted to be super cautious, but time has
shown that it works just fine.

In the long run I even believe that we should drop the option and
enable the feature unconditionally. It doesn't do anything until the
user explicitly starts twiddling with sysfs attributes anyway.

Signed-off-by: Jean Delvare <jdelvare@suse.de>
Link: https://lore.kernel.org/r/20190806102123.3118bcc5@endymion
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
5 years agohwmon: (npcm750-pwm-fan) Remove dev_err() usage after platform_get_irq()
Stephen Boyd [Tue, 30 Jul 2019 18:15:17 +0000 (11:15 -0700)]
hwmon: (npcm750-pwm-fan) Remove dev_err() usage after platform_get_irq()

We don't need dev_err() messages when platform_get_irq() fails now that
platform_get_irq() prints an error message itself when something goes
wrong. Let's remove these prints with a simple semantic patch.

// <smpl>
@@
expression ret;
struct platform_device *E;
@@

ret =
(
platform_get_irq(E, ...)
|
platform_get_irq_byname(E, ...)
);

if ( \( ret < 0 \| ret <= 0 \) )
{
(
-if (ret != -EPROBE_DEFER)
-{ ...
-dev_err(...);
-... }
|
...
-dev_err(...);
)
...
}
// </smpl>

While we're here, remove braces on if statements that only have one
statement (manually).

Cc: Jean Delvare <jdelvare@suse.com>
Cc: Guenter Roeck <linux@roeck-us.net>
Cc: linux-hwmon@vger.kernel.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Stephen Boyd <swboyd@chromium.org>
[groeck: Dropped jz4740-hwmon.c (driver is being removed)]
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
5 years agohwmon: (acpi_power_meter) Change log level for 'unsafe software power cap'
Wang Shenran [Wed, 24 Jul 2019 08:01:10 +0000 (11:01 +0300)]
hwmon: (acpi_power_meter) Change log level for 'unsafe software power cap'

At boot time, the acpi_power_meter driver logs the following error level
message: "Ignoring unsafe software power cap". Having read about it from
a few sources, it seems that the error message can be quite misleading.

While the message can imply that Linux is ignoring the fact that the
system is operating in potentially dangerous conditions, the truth is
the driver found an ACPI_PMC object that supports software power
capping. The driver simply decides not to use it, perhaps because it
doesn't support the object.

The best solution is probably changing the log level from error to warning.
All sources I have found, regarding the error, have downplayed its
significance. There is not much of a reason for it to be on error level,
while causing potential confusions or misinterpretations.

Signed-off-by: Wang Shenran <shenran268@gmail.com>
Link: https://lore.kernel.org/r/20190724080110.6952-1-shenran268@gmail.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
5 years agohwmon: (nct6775) Integrate new model nct6116
Björn Gerhart [Tue, 23 Jul 2019 16:06:46 +0000 (18:06 +0200)]
hwmon: (nct6775) Integrate new model nct6116

Add support for NCT6116D to nct6775 driver.

Signed-off-by: Bjoern Gerhart <gerhart@posteo.de>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
5 years agohwmon: (adt7475) Convert to use hwmon_device_register_with_groups()
Grant McEwan [Sun, 21 Jul 2019 22:55:30 +0000 (10:55 +1200)]
hwmon: (adt7475) Convert to use hwmon_device_register_with_groups()

hwmon_device_register() is a deprecated function and produces a warning.

Converting the driver to use the hwmon_device_register_with_groups()
instead.

Signed-off-by: Grant McEwan <grant.mcewan@alliedtelesis.co.nz>
Link: https://lore.kernel.org/r/20190721225530.28799-2-grant.mcewan@alliedtelesis.co.nz
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
5 years agohwmon: (w83781d) convert to i2c_new_dummy_device
Wolfram Sang [Mon, 22 Jul 2019 17:26:10 +0000 (19:26 +0200)]
hwmon: (w83781d) convert to i2c_new_dummy_device

Move from i2c_new_dummy() to i2c_new_dummy_device(), so we now get an
ERRPTR which we use in error handling.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Link: https://lore.kernel.org/r/20190722172611.3797-4-wsa+renesas@sang-engineering.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
5 years agohwmon: (smm665) convert to i2c_new_dummy_device
Wolfram Sang [Mon, 22 Jul 2019 17:26:09 +0000 (19:26 +0200)]
hwmon: (smm665) convert to i2c_new_dummy_device

Move from i2c_new_dummy() to i2c_new_dummy_device(), so we now get an
ERRPTR which we use in error handling.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Link: https://lore.kernel.org/r/20190722172611.3797-3-wsa+renesas@sang-engineering.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
5 years agohwmon: (asb100) convert to i2c_new_dummy_device
Wolfram Sang [Mon, 22 Jul 2019 17:26:08 +0000 (19:26 +0200)]
hwmon: (asb100) convert to i2c_new_dummy_device

Move from i2c_new_dummy() to i2c_new_dummy_device(), so we now get an
ERRPTR which we use in error handling.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Link: https://lore.kernel.org/r/20190722172611.3797-2-wsa+renesas@sang-engineering.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
5 years agohwmon: (k10temp) Add support for AMD family 17h, model 70h CPUs
Marcel Bocu [Mon, 22 Jul 2019 17:46:53 +0000 (20:46 +0300)]
hwmon: (k10temp) Add support for AMD family 17h, model 70h CPUs

It would seem like model 70h is behaving in the same way as model 30h,
so let's just add the new F3 PCI ID to the list of compatible devices.

Unlike previous Ryzen/Threadripper, Ryzen gen 3 processors do not need
temperature offsets anymore. This has been reported in the press and
verified on my Ryzen 3700X by checking that the idle temperature
reported by k10temp is matching the temperature reported by the
firmware.

Vicki Pfau sent an identical patch after I checked that no-one had
written this patch. I would have been happy about dropping my patch but
unlike for his patch series, I had already Cc:ed the x86 people and
they already reviewed the changes. Since Vicki has not answered to
any email after his initial series, let's assume she is on vacation
and let's avoid duplication of reviews from the maintainers and merge
my series. To acknowledge Vicki's anteriority, I added her S-o-b to
the patch.

v2, suggested by Guenter Roeck and Brian Woods:
  - rename from 71h to 70h

Signed-off-by: Vicki Pfau <vi@endrift.com>
Signed-off-by: Marcel Bocu <marcel.p.bocu@gmail.com>
Tested-by: Marcel Bocu <marcel.p.bocu@gmail.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: x86@kernel.org
Cc: "Woods, Brian" <Brian.Woods@amd.com>
Cc: Clemens Ladisch <clemens@ladisch.de>
Cc: Jean Delvare <jdelvare@suse.com>
Cc: Guenter Roeck <linux@roeck-us.net>
Cc: linux-hwmon@vger.kernel.org
Link: https://lore.kernel.org/r/20190722174653.2391-1-marcel.p.bocu@gmail.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
5 years agox86/amd_nb: Add PCI device IDs for family 17h, model 70h
Marcel Bocu [Mon, 22 Jul 2019 17:45:10 +0000 (20:45 +0300)]
x86/amd_nb: Add PCI device IDs for family 17h, model 70h

The AMD Ryzen gen 3 processors came with a different PCI IDs for the
function 3 & 4 which are used to access the SMN interface. The root
PCI address however remained at the same address as the model 30h.

Adding the F3/F4 PCI IDs respectively to the misc and link ids appear
to be sufficient for k10temp, so let's add them and follow up on the
patch if other functions need more tweaking.

Vicki Pfau sent an identical patch after I checked that no-one had
written this patch. I would have been happy about dropping my patch but
unlike for his patch series, I had already Cc:ed the x86 people and
they already reviewed the changes. Since Vicki has not answered to
any email after his initial series, let's assume she is on vacation
and let's avoid duplication of reviews from the maintainers and merge
my series. To acknowledge Vicki's anteriority, I added her S-o-b to
the patch.

v2, suggested by Guenter Roeck and Brian Woods:
 - rename from 71h to 70h

Signed-off-by: Vicki Pfau <vi@endrift.com>
Signed-off-by: Marcel Bocu <marcel.p.bocu@gmail.com>
Tested-by: Marcel Bocu <marcel.p.bocu@gmail.com>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Brian Woods <brian.woods@amd.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com> # pci_ids.h
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: x86@kernel.org
Cc: "Woods, Brian" <Brian.Woods@amd.com>
Cc: Clemens Ladisch <clemens@ladisch.de>
Cc: Jean Delvare <jdelvare@suse.com>
Cc: Guenter Roeck <linux@roeck-us.net>
Cc: linux-hwmon@vger.kernel.org
Link: https://lore.kernel.org/r/20190722174510.2179-1-marcel.p.bocu@gmail.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
5 years agodocs: hwmon: pxe1610: convert to ReST format and add to the index
Mauro Carvalho Chehab [Mon, 22 Jul 2019 11:07:45 +0000 (08:07 -0300)]
docs: hwmon: pxe1610: convert to ReST format and add to the index

This document was recently introduced. Convert it to ReST
just like the other hwmon documents, adding it to the hwmon index.

Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Link: https://lore.kernel.org/r/657bf022625e0888d3becf10c78d162eeb864608.1563792334.git.mchehab+samsung@kernel.org
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
5 years agohwmon: (k8temp) update to use new hwmon registration API
Robert Karszniewicz [Sun, 21 Jul 2019 12:00:51 +0000 (14:00 +0200)]
hwmon: (k8temp) update to use new hwmon registration API

Removes:
- hwmon_dev from k8temp_data struct, as that is now passed
  to callbacks, anyway.
- other k8temp_data struct fields, too.
- k8temp_update_device()

Also reduces binary size:
   text    data     bss     dec     hex filename
   4139    1448       0    5587    15d3 drivers/hwmon/k8temp.ko.bak
   3103    1220       0    4323    10e3 drivers/hwmon/k8temp.ko

Signed-off-by: Robert Karszniewicz <avoidr@firemail.cc>
Signed-off-by: Robert Karszniewicz <avoidr@riseup.net>
Link: https://lore.kernel.org/r/20190721120051.28064-1-avoidr@riseup.net
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
5 years agohwmon: (pmbus/max31785) Remove a useless #define
Christophe JAILLET [Sun, 21 Jul 2019 10:15:53 +0000 (12:15 +0200)]
hwmon: (pmbus/max31785) Remove a useless #define

There is a typo in MAX37185_NUM_FAN_PAGES. To be consistent, it should be
MAX31785_NUM_FAN_PAGES (1 and 7 switched).

At line 24, we already have:
   #define MAX31785_NR_FAN_PAGES 6
and MAX37185_NUM_FAN_PAGES seems to be unused.

It is likely that it is only a typo and/or a left-over.
So, axe it.

Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Link: https://lore.kernel.org/r/20190721101553.20911-1-christophe.jaillet@wanadoo.fr
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
5 years agohwmon: (lm75) add support for PCT2075
Daniel Mack [Thu, 11 Jul 2019 12:45:04 +0000 (14:45 +0200)]
hwmon: (lm75) add support for PCT2075

The NXP PCT2075 is largely compatible with other chips already supported
by the LM75 driver. It uses an 11-bit resolution and defaults to 100 ms
sampling period. The datasheet is here:

  https://www.nxp.com/docs/en/data-sheet/PCT2075.pdf

Signed-off-by: Daniel Mack <daniel@zonque.org>
Link: https://lore.kernel.org/r/20190711124504.7580-2-daniel@zonque.org
[groeck: Documentation update]
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
5 years agodevice-tree: bindinds: add NXP PCT2075 as compatible device to LM75
Daniel Mack [Thu, 11 Jul 2019 12:45:03 +0000 (14:45 +0200)]
device-tree: bindinds: add NXP PCT2075 as compatible device to LM75

The PCT2075 is compatible to other chips that are already handled by
the LM75 driver.

Signed-off-by: Daniel Mack <daniel@zonque.org>
Link: https://lore.kernel.org/r/20190711124504.7580-1-daniel@zonque.org
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
5 years agohwmon: Remove ads1015 driver
Guenter Roeck [Mon, 1 Jul 2019 18:12:38 +0000 (11:12 -0700)]
hwmon: Remove ads1015 driver

A driver for ADS1015 with more functionality is available in the iio
subsystem.

Remove the hwmon driver as duplicate. If the chip is used for hardware
monitoring, the iio->hwmon bridge should be used.

Cc: Dirk Eibach <eibach@gdsys.de>
Link: https://lore.kernel.org/r/1562004758-13025-1-git-send-email-linux@roeck-us.net
Acked-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
5 years agohwmon (coretemp) Fix a memory leak bug
Wenwen Wang [Mon, 19 Aug 2019 21:00:02 +0000 (16:00 -0500)]
hwmon (coretemp) Fix a memory leak bug

In coretemp_init(), 'zone_devices' is allocated through kcalloc().
However, it is not deallocated in the following execution if
platform_driver_register() fails, leading to a memory leak. To fix this
issue, introduce the 'outzone' label to free 'zone_devices' before
returning the error.

Signed-off-by: Wenwen Wang <wenwen@cs.uga.edu>
Link: https://lore.kernel.org/r/1566248402-6538-1-git-send-email-wenwen@cs.uga.edu
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
5 years agohwmon: (lm75) Fix write operations for negative temperatures
Guenter Roeck [Thu, 8 Aug 2019 19:00:18 +0000 (12:00 -0700)]
hwmon: (lm75) Fix write operations for negative temperatures

Writes into limit registers fail if the temperature written is negative.
The regmap write operation checks the value range, regmap_write accepts
an unsigned int as parameter, and the temperature value passed to
regmap_write is kept in a variable declared as long. Negative values
are converted large unsigned integers, which fails the range check.
Fix by type casting the temperature to u16 when calling regmap_write().

Cc: Iker Perez del Palomar Sustatxa <iker.perez@codethink.co.uk>
Fixes: e65365fed87f ("hwmon: (lm75) Convert to use regmap")
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
5 years agohwmon: pmbus: ucd9000: remove unneeded include
Bartosz Golaszewski [Thu, 8 Aug 2019 08:01:44 +0000 (10:01 +0200)]
hwmon: pmbus: ucd9000: remove unneeded include

Build bot reports the following build issue after commit 9091373ab7ea
("gpio: remove less important #ifdef around declarations):

   In file included from drivers/hwmon/pmbus/ucd9000.c:19:0:
>> include/linux/gpio/driver.h:576:1: error: redefinition of 'gpiochip_add_pin_range'
    gpiochip_add_pin_range(struct gpio_chip *chip, const char *pinctl_name,
    ^~~~~~~~~~~~~~~~~~~~~~
   In file included from drivers/hwmon/pmbus/ucd9000.c:18:0:
   include/linux/gpio.h:245:1: note: previous definition of 'gpiochip_add_pin_range' was here
    gpiochip_add_pin_range(struct gpio_chip *chip, const char *pinctl_name,
    ^~~~~~~~~~~~~~~~~~~~~~
   In file included from drivers/hwmon/pmbus/ucd9000.c:19:0:
>> include/linux/gpio/driver.h:583:1: error: redefinition of 'gpiochip_add_pingroup_range'
    gpiochip_add_pingroup_range(struct gpio_chip *chip,
    ^~~~~~~~~~~~~~~~~~~~~~~~~~~
   In file included from drivers/hwmon/pmbus/ucd9000.c:18:0:
   include/linux/gpio.h:254:1: note: previous definition of 'gpiochip_add_pingroup_range' was here
    gpiochip_add_pingroup_range(struct gpio_chip *chip,
    ^~~~~~~~~~~~~~~~~~~~~~~~~~~
   In file included from drivers/hwmon/pmbus/ucd9000.c:19:0:
>> include/linux/gpio/driver.h:591:1: error: redefinition of 'gpiochip_remove_pin_ranges'
    gpiochip_remove_pin_ranges(struct gpio_chip *chip)
    ^~~~~~~~~~~~~~~~~~~~~~~~~~
   In file included from drivers/hwmon/pmbus/ucd9000.c:18:0:
   include/linux/gpio.h:263:1: note: previous definition of 'gpiochip_remove_pin_ranges' was here
    gpiochip_remove_pin_ranges(struct gpio_chip *chip)

This is caused by conflicting defines from linux/gpio.h and
linux/gpio/driver.h. Drivers should not include both the legacy and
the new API headers. This driver doesn't even use linux/gpio.h so
remove it.

Reported-by: kbuild test robot <lkp@intel.com>
Cc: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Link: https://lore.kernel.org/r/20190808080144.6183-1-brgl@bgdev.pl
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
5 years agoLinux 5.3-rc6
Linus Torvalds [Sun, 25 Aug 2019 19:01:23 +0000 (12:01 -0700)]
Linux 5.3-rc6

5 years agoMerge tag 'auxdisplay-for-linus-v5.3-rc7' of git://github.com/ojeda/linux
Linus Torvalds [Sun, 25 Aug 2019 18:43:17 +0000 (11:43 -0700)]
Merge tag 'auxdisplay-for-linus-v5.3-rc7' of git://github.com/ojeda/linux

Pull auxdisplay cleanup from Miguel Ojeda:
 "Make ht16k33_fb_fix and ht16k33_fb_var constant (Nishka Dasgupta)"

* tag 'auxdisplay-for-linus-v5.3-rc7' of git://github.com/ojeda/linux:
  auxdisplay: ht16k33: Make ht16k33_fb_fix and ht16k33_fb_var constant

5 years agoMerge tag 'for-linus-5.3-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/uml
Linus Torvalds [Sun, 25 Aug 2019 18:40:24 +0000 (11:40 -0700)]
Merge tag 'for-linus-5.3-rc6' of git://git./linux/kernel/git/rw/uml

Pull UML fix from Richard Weinberger:
 "Fix time travel mode"

* tag 'for-linus-5.3-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/uml:
  um: fix time travel mode

5 years agoMerge tag 'for-linus-5.3-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/rw...
Linus Torvalds [Sun, 25 Aug 2019 18:29:27 +0000 (11:29 -0700)]
Merge tag 'for-linus-5.3-rc6' of git://git./linux/kernel/git/rw/ubifs

Pull UBIFS and JFFS2 fixes from Richard Weinberger:
 "UBIFS:
   - Don't block too long in writeback_inodes_sb()
   - Fix for a possible overrun of the log head
   - Fix double unlock in orphan_delete()

  JFFS2:
   - Remove C++ style from UAPI header and unbreak picky toolchains"

* tag 'for-linus-5.3-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/ubifs:
  ubifs: Limit the number of pages in shrink_liability
  ubifs: Correctly initialize c->min_log_bytes
  ubifs: Fix double unlock around orphan_delete()
  jffs2: Remove C++ style comments from uapi header

5 years agoMerge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sun, 25 Aug 2019 17:10:15 +0000 (10:10 -0700)]
Merge branch 'x86-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull x86 fixes from Thomas Gleixner:
 "A few fixes for x86:

   - Fix a boot regression caused by the recent bootparam sanitizing
     change, which escaped the attention of all people who reviewed that
     code.

   - Address a boot problem on machines with broken E820 tables caused
     by an underflow which ended up placing the trampoline start at
     physical address 0.

   - Handle machines which do not advertise a legacy timer of any form,
     but need calibration of the local APIC timer gracefully by making
     the calibration routine independent from the tick interrupt. Marked
     for stable as well as there seems to be quite some new laptops
     rolled out which expose this.

   - Clear the RDRAND CPUID bit on AMD family 15h and 16h CPUs which are
     affected by broken firmware which does not initialize RDRAND
     correctly after resume. Add a command line parameter to override
     this for machine which either do not use suspend/resume or have a
     fixed BIOS. Unfortunately there is no way to detect this on boot,
     so the only safe decision is to turn it off by default.

   - Prevent RFLAGS from being clobbers in CALL_NOSPEC on 32bit which
     caused fast KVM instruction emulation to break.

   - Explain the Intel CPU model naming convention so that the repeating
     discussions come to an end"

* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/retpoline: Don't clobber RFLAGS during CALL_NOSPEC on i386
  x86/boot: Fix boot regression caused by bootparam sanitizing
  x86/CPU/AMD: Clear RDRAND CPUID bit on AMD family 15h/16h
  x86/boot/compressed/64: Fix boot on machines with broken E820 table
  x86/apic: Handle missing global clockevent gracefully
  x86/cpu: Explain Intel model naming convention

5 years agoMerge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sun, 25 Aug 2019 17:08:01 +0000 (10:08 -0700)]
Merge branch 'timers-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull timekeeping fix from Thomas Gleixner:
 "A single fix for a regression caused by the generic VDSO
  implementation where a math overflow causes CLOCK_BOOTTIME to become a
  random number generator"

* 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  timekeeping/vsyscall: Prevent math overflow in BOOTTIME update

5 years agoMerge branch 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sun, 25 Aug 2019 17:06:12 +0000 (10:06 -0700)]
Merge branch 'sched-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull scheduler fix from Thomas Gleixner:
 "Handle the worker management in situations where a task is scheduled
  out on a PI lock contention correctly and schedule a new worker if
  possible"

* 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  sched/core: Schedule new worker even if PI-blocked

5 years agoMerge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sun, 25 Aug 2019 17:03:32 +0000 (10:03 -0700)]
Merge branch 'perf-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull perf fixes from Thomas Gleixner:
 "Two small fixes for kprobes and perf:

   - Prevent a deadlock in kprobe_optimizer() causes by reverse lock
     ordering

   - Fix a comment typo"

* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  kprobes: Fix potential deadlock in kprobe_optimizer()
  perf/x86: Fix typo in comment

5 years agoMerge branch 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sun, 25 Aug 2019 17:00:21 +0000 (10:00 -0700)]
Merge branch 'irq-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull irq fix from Thomas Gleixner:
 "A single fix for a imbalanced kobject operation in the irq decriptor
  code which was unearthed by the new warnings in the kobject code"

* 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  genirq: Properly pair kobject_del() with kobject_add()

5 years agoMerge branch 'akpm' (patches from Andrew)
Linus Torvalds [Sun, 25 Aug 2019 16:56:27 +0000 (09:56 -0700)]
Merge branch 'akpm' (patches from Andrew)

Mergr misc fixes from Andrew Morton:
 "11 fixes"

Mostly VM fixes, one psi polling fix, and one parisc build fix.

* emailed patches from Andrew Morton <akpm@linux-foundation.org>:
  mm/kasan: fix false positive invalid-free reports with CONFIG_KASAN_SW_TAGS=y
  mm/zsmalloc.c: fix race condition in zs_destroy_pool
  mm/zsmalloc.c: migration can leave pages in ZS_EMPTY indefinitely
  mm, page_owner: handle THP splits correctly
  userfaultfd_release: always remove uffd flags and clear vm_userfaultfd_ctx
  psi: get poll_work to run when calling poll syscall next time
  mm: memcontrol: flush percpu vmevents before releasing memcg
  mm: memcontrol: flush percpu vmstats before releasing memcg
  parisc: fix compilation errrors
  mm, page_alloc: move_freepages should not examine struct page of reserved memory
  mm/z3fold.c: fix race between migration and destruction

5 years agoMerge tag 'dma-mapping-5.3-5' of git://git.infradead.org/users/hch/dma-mapping
Linus Torvalds [Sun, 25 Aug 2019 03:00:11 +0000 (20:00 -0700)]
Merge tag 'dma-mapping-5.3-5' of git://git.infradead.org/users/hch/dma-mapping

Pull dma-mapping fixes from Christoph Hellwig:
 "Two fixes for regressions in this merge window:

   - select the Kconfig symbols for the noncoherent dma arch helpers on
     arm if swiotlb is selected, not just for LPAE to not break then Xen
     build, that uses swiotlb indirectly through swiotlb-xen

   - fix the page allocator fallback in dma_alloc_contiguous if the CMA
     allocation fails"

* tag 'dma-mapping-5.3-5' of git://git.infradead.org/users/hch/dma-mapping:
  dma-direct: fix zone selection after an unaddressable CMA allocation
  arm: select the dma-noncoherent symbols for all swiotlb builds

5 years agomm/kasan: fix false positive invalid-free reports with CONFIG_KASAN_SW_TAGS=y
Andrey Ryabinin [Sun, 25 Aug 2019 00:55:09 +0000 (17:55 -0700)]
mm/kasan: fix false positive invalid-free reports with CONFIG_KASAN_SW_TAGS=y

The code like this:

ptr = kmalloc(size, GFP_KERNEL);
page = virt_to_page(ptr);
offset = offset_in_page(ptr);
kfree(page_address(page) + offset);

may produce false-positive invalid-free reports on the kernel with
CONFIG_KASAN_SW_TAGS=y.

In the example above we lose the original tag assigned to 'ptr', so
kfree() gets the pointer with 0xFF tag.  In kfree() we check that 0xFF
tag is different from the tag in shadow hence print false report.

Instead of just comparing tags, do the following:

1) Check that shadow doesn't contain KASAN_TAG_INVALID.  Otherwise it's
   double-free and it doesn't matter what tag the pointer have.

2) If pointer tag is different from 0xFF, make sure that tag in the
   shadow is the same as in the pointer.

Link: http://lkml.kernel.org/r/20190819172540.19581-1-aryabinin@virtuozzo.com
Fixes: 7f94ffbc4c6a ("kasan: add hooks implementation for tag-based mode")
Signed-off-by: Andrey Ryabinin <aryabinin@virtuozzo.com>
Reported-by: Walter Wu <walter-zh.wu@mediatek.com>
Reported-by: Mark Rutland <mark.rutland@arm.com>
Reviewed-by: Andrey Konovalov <andreyknvl@google.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
5 years agomm/zsmalloc.c: fix race condition in zs_destroy_pool
Henry Burns [Sun, 25 Aug 2019 00:55:06 +0000 (17:55 -0700)]
mm/zsmalloc.c: fix race condition in zs_destroy_pool

In zs_destroy_pool() we call flush_work(&pool->free_work).  However, we
have no guarantee that migration isn't happening in the background at
that time.

Since migration can't directly free pages, it relies on free_work being
scheduled to free the pages.  But there's nothing preventing an
in-progress migrate from queuing the work *after*
zs_unregister_migration() has called flush_work().  Which would mean
pages still pointing at the inode when we free it.

Since we know at destroy time all objects should be free, no new
migrations can come in (since zs_page_isolate() fails for fully-free
zspages).  This means it is sufficient to track a "# isolated zspages"
count by class, and have the destroy logic ensure all such pages have
drained before proceeding.  Keeping that state under the class spinlock
keeps the logic straightforward.

In this case a memory leak could lead to an eventual crash if compaction
hits the leaked page.  This crash would only occur if people are
changing their zswap backend at runtime (which eventually starts
destruction).

Link: http://lkml.kernel.org/r/20190809181751.219326-2-henryburns@google.com
Fixes: 48b4800a1c6a ("zsmalloc: page migration support")
Signed-off-by: Henry Burns <henryburns@google.com>
Reviewed-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Cc: Henry Burns <henrywolfeburns@gmail.com>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Shakeel Butt <shakeelb@google.com>
Cc: Jonathan Adams <jwadams@google.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
5 years agomm/zsmalloc.c: migration can leave pages in ZS_EMPTY indefinitely
Henry Burns [Sun, 25 Aug 2019 00:55:03 +0000 (17:55 -0700)]
mm/zsmalloc.c: migration can leave pages in ZS_EMPTY indefinitely

In zs_page_migrate() we call putback_zspage() after we have finished
migrating all pages in this zspage.  However, the return value is
ignored.  If a zs_free() races in between zs_page_isolate() and
zs_page_migrate(), freeing the last object in the zspage,
putback_zspage() will leave the page in ZS_EMPTY for potentially an
unbounded amount of time.

To fix this, we need to do the same thing as zs_page_putback() does:
schedule free_work to occur.

To avoid duplicated code, move the sequence to a new
putback_zspage_deferred() function which both zs_page_migrate() and
zs_page_putback() call.

Link: http://lkml.kernel.org/r/20190809181751.219326-1-henryburns@google.com
Fixes: 48b4800a1c6a ("zsmalloc: page migration support")
Signed-off-by: Henry Burns <henryburns@google.com>
Reviewed-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Cc: Henry Burns <henrywolfeburns@gmail.com>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Shakeel Butt <shakeelb@google.com>
Cc: Jonathan Adams <jwadams@google.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
5 years agomm, page_owner: handle THP splits correctly
Vlastimil Babka [Sun, 25 Aug 2019 00:54:59 +0000 (17:54 -0700)]
mm, page_owner: handle THP splits correctly

THP splitting path is missing the split_page_owner() call that
split_page() has.

As a result, split THP pages are wrongly reported in the page_owner file
as order-9 pages.  Furthermore when the former head page is freed, the
remaining former tail pages are not listed in the page_owner file at
all.  This patch fixes that by adding the split_page_owner() call into
__split_huge_page().

Link: http://lkml.kernel.org/r/20190820131828.22684-2-vbabka@suse.cz
Fixes: a9627bc5e34e ("mm/page_owner: introduce split_page_owner and replace manual handling")
Reported-by: Kirill A. Shutemov <kirill@shutemov.name>
Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Mel Gorman <mgorman@techsingularity.net>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
5 years agouserfaultfd_release: always remove uffd flags and clear vm_userfaultfd_ctx
Oleg Nesterov [Sun, 25 Aug 2019 00:54:56 +0000 (17:54 -0700)]
userfaultfd_release: always remove uffd flags and clear vm_userfaultfd_ctx

userfaultfd_release() should clear vm_flags/vm_userfaultfd_ctx even if
mm->core_state != NULL.

Otherwise a page fault can see userfaultfd_missing() == T and use an
already freed userfaultfd_ctx.

Link: http://lkml.kernel.org/r/20190820160237.GB4983@redhat.com
Fixes: 04f5866e41fb ("coredump: fix race condition between mmget_not_zero()/get_task_mm() and core dumping")
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Reported-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Reviewed-by: Andrea Arcangeli <aarcange@redhat.com>
Tested-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Cc: Peter Xu <peterx@redhat.com>
Cc: Mike Rapoport <rppt@linux.ibm.com>
Cc: Jann Horn <jannh@google.com>
Cc: Jason Gunthorpe <jgg@mellanox.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
5 years agopsi: get poll_work to run when calling poll syscall next time
Jason Xing [Sun, 25 Aug 2019 00:54:53 +0000 (17:54 -0700)]
psi: get poll_work to run when calling poll syscall next time

Only when calling the poll syscall the first time can user receive
POLLPRI correctly.  After that, user always fails to acquire the event
signal.

Reproduce case:
 1. Get the monitor code in Documentation/accounting/psi.txt
 2. Run it, and wait for the event triggered.
 3. Kill and restart the process.

The question is why we can end up with poll_scheduled = 1 but the work
not running (which would reset it to 0).  And the answer is because the
scheduling side sees group->poll_kworker under RCU protection and then
schedules it, but here we cancel the work and destroy the worker.  The
cancel needs to pair with resetting the poll_scheduled flag.

Link: http://lkml.kernel.org/r/1566357985-97781-1-git-send-email-joseph.qi@linux.alibaba.com
Signed-off-by: Jason Xing <kerneljasonxing@linux.alibaba.com>
Signed-off-by: Joseph Qi <joseph.qi@linux.alibaba.com>
Reviewed-by: Caspar Zhang <caspar@linux.alibaba.com>
Reviewed-by: Suren Baghdasaryan <surenb@google.com>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
5 years agomm: memcontrol: flush percpu vmevents before releasing memcg
Roman Gushchin [Sun, 25 Aug 2019 00:54:50 +0000 (17:54 -0700)]
mm: memcontrol: flush percpu vmevents before releasing memcg

Similar to vmstats, percpu caching of local vmevents leads to an
accumulation of errors on non-leaf levels.  This happens because some
leftovers may remain in percpu caches, so that they are never propagated
up by the cgroup tree and just disappear into nonexistence with on
releasing of the memory cgroup.

To fix this issue let's accumulate and propagate percpu vmevents values
before releasing the memory cgroup similar to what we're doing with
vmstats.

Since on cpu hotplug we do flush percpu vmstats anyway, we can iterate
only over online cpus.

Link: http://lkml.kernel.org/r/20190819202338.363363-4-guro@fb.com
Fixes: 42a300353577 ("mm: memcontrol: fix recursive statistics correctness & scalabilty")
Signed-off-by: Roman Gushchin <guro@fb.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Vladimir Davydov <vdavydov.dev@gmail.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
5 years agomm: memcontrol: flush percpu vmstats before releasing memcg
Roman Gushchin [Sun, 25 Aug 2019 00:54:47 +0000 (17:54 -0700)]
mm: memcontrol: flush percpu vmstats before releasing memcg

Percpu caching of local vmstats with the conditional propagation by the
cgroup tree leads to an accumulation of errors on non-leaf levels.

Let's imagine two nested memory cgroups A and A/B.  Say, a process
belonging to A/B allocates 100 pagecache pages on the CPU 0.  The percpu
cache will spill 3 times, so that 32*3=96 pages will be accounted to A/B
and A atomic vmstat counters, 4 pages will remain in the percpu cache.

Imagine A/B is nearby memory.max, so that every following allocation
triggers a direct reclaim on the local CPU.  Say, each such attempt will
free 16 pages on a new cpu.  That means every percpu cache will have -16
pages, except the first one, which will have 4 - 16 = -12.  A/B and A
atomic counters will not be touched at all.

Now a user removes A/B.  All percpu caches are freed and corresponding
vmstat numbers are forgotten.  A has 96 pages more than expected.

As memory cgroups are created and destroyed, errors do accumulate.  Even
1-2 pages differences can accumulate into large numbers.

To fix this issue let's accumulate and propagate percpu vmstat values
before releasing the memory cgroup.  At this point these numbers are
stable and cannot be changed.

Since on cpu hotplug we do flush percpu vmstats anyway, we can iterate
only over online cpus.

Link: http://lkml.kernel.org/r/20190819202338.363363-2-guro@fb.com
Fixes: 42a300353577 ("mm: memcontrol: fix recursive statistics correctness & scalabilty")
Signed-off-by: Roman Gushchin <guro@fb.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Vladimir Davydov <vdavydov.dev@gmail.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
5 years agoparisc: fix compilation errrors
Qian Cai [Sun, 25 Aug 2019 00:54:43 +0000 (17:54 -0700)]
parisc: fix compilation errrors

Commit 0cfaee2af3a0 ("include/asm-generic/5level-fixup.h: fix variable
'p4d' set but not used") converted a few functions from macros to static
inline, which causes parisc to complain,

  In file included from include/asm-generic/4level-fixup.h:38:0,
                   from arch/parisc/include/asm/pgtable.h:5,
                   from arch/parisc/include/asm/io.h:6,
                   from include/linux/io.h:13,
                   from sound/core/memory.c:9:
  include/asm-generic/5level-fixup.h:14:18: error: unknown type name 'pgd_t'; did you mean 'pid_t'?
   #define p4d_t    pgd_t
                    ^
  include/asm-generic/5level-fixup.h:24:28: note: in expansion of macro 'p4d_t'
   static inline int p4d_none(p4d_t p4d)
                              ^~~~~

It is because "4level-fixup.h" is included before "asm/page.h" where
"pgd_t" is defined.

Link: http://lkml.kernel.org/r/20190815205305.1382-1-cai@lca.pw
Fixes: 0cfaee2af3a0 ("include/asm-generic/5level-fixup.h: fix variable 'p4d' set but not used")
Signed-off-by: Qian Cai <cai@lca.pw>
Reported-by: Guenter Roeck <linux@roeck-us.net>
Tested-by: Guenter Roeck <linux@roeck-us.net>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
5 years agomm, page_alloc: move_freepages should not examine struct page of reserved memory
David Rientjes [Sun, 25 Aug 2019 00:54:40 +0000 (17:54 -0700)]
mm, page_alloc: move_freepages should not examine struct page of reserved memory

After commit 907ec5fca3dc ("mm: zero remaining unavailable struct
pages"), struct page of reserved memory is zeroed.  This causes
page->flags to be 0 and fixes issues related to reading
/proc/kpageflags, for example, of reserved memory.

The VM_BUG_ON() in move_freepages_block(), however, assumes that
page_zone() is meaningful even for reserved memory.  That assumption is
no longer true after the aforementioned commit.

There's no reason why move_freepages_block() should be testing the
legitimacy of page_zone() for reserved memory; its scope is limited only
to pages on the zone's freelist.

Note that pfn_valid() can be true for reserved memory: there is a
backing struct page.  The check for page_to_nid(page) is also buggy but
reserved memory normally only appears on node 0 so the zeroing doesn't
affect this.

Move the debug checks to after verifying PageBuddy is true.  This
isolates the scope of the checks to only be for buddy pages which are on
the zone's freelist which move_freepages_block() is operating on.  In
this case, an incorrect node or zone is a bug worthy of being warned
about (and the examination of struct page is acceptable bcause this
memory is not reserved).

Why does move_freepages_block() gets called on reserved memory? It's
simply math after finding a valid free page from the per-zone free area
to use as fallback.  We find the beginning and end of the pageblock of
the valid page and that can bring us into memory that was reserved per
the e820.  pfn_valid() is still true (it's backed by a struct page), but
since it's zero'd we shouldn't make any inferences here about comparing
its node or zone.  The current node check just happens to succeed most
of the time by luck because reserved memory typically appears on node 0.

The fix here is to validate that we actually have buddy pages before
testing if there's any type of zone or node strangeness going on.

We noticed it almost immediately after bringing 907ec5fca3dc in on
CONFIG_DEBUG_VM builds.  It depends on finding specific free pages in
the per-zone free area where the math in move_freepages() will bring the
start or end pfn into reserved memory and wanting to claim that entire
pageblock as a new migratetype.  So the path will be rare, require
CONFIG_DEBUG_VM, and require fallback to a different migratetype.

Some struct pages were already zeroed from reserve pages before
907ec5fca3c so it theoretically could trigger before this commit.  I
think it's rare enough under a config option that most people don't run
that others may not have noticed.  I wouldn't argue against a stable tag
and the backport should be easy enough, but probably wouldn't single out
a commit that this is fixing.

Mel said:

: The overhead of the debugging check is higher with this patch although
: it'll only affect debug builds and the path is not particularly hot.
: If this was a concern, I think it would be reasonable to simply remove
: the debugging check as the zone boundaries are checked in
: move_freepages_block and we never expect a zone/node to be smaller than
: a pageblock and stuck in the middle of another zone.

Link: http://lkml.kernel.org/r/alpine.DEB.2.21.1908122036560.10779@chino.kir.corp.google.com
Signed-off-by: David Rientjes <rientjes@google.com>
Acked-by: Mel Gorman <mgorman@techsingularity.net>
Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Cc: Masayoshi Mizuma <m.mizuma@jp.fujitsu.com>
Cc: Oscar Salvador <osalvador@suse.de>
Cc: Pavel Tatashin <pavel.tatashin@microsoft.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
5 years agomm/z3fold.c: fix race between migration and destruction
Henry Burns [Sun, 25 Aug 2019 00:54:37 +0000 (17:54 -0700)]
mm/z3fold.c: fix race between migration and destruction

In z3fold_destroy_pool() we call destroy_workqueue(&pool->compact_wq).
However, we have no guarantee that migration isn't happening in the
background at that time.

Migration directly calls queue_work_on(pool->compact_wq), if destruction
wins that race we are using a destroyed workqueue.

Link: http://lkml.kernel.org/r/20190809213828.202833-1-henryburns@google.com
Signed-off-by: Henry Burns <henryburns@google.com>
Cc: Vitaly Wool <vitalywool@gmail.com>
Cc: Shakeel Butt <shakeelb@google.com>
Cc: Jonathan Adams <jwadams@google.com>
Cc: Henry Burns <henrywolfeburns@gmail.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
5 years agoMerge tag 'gpio-v5.3-4' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux...
Linus Torvalds [Sat, 24 Aug 2019 21:45:33 +0000 (14:45 -0700)]
Merge tag 'gpio-v5.3-4' of git://git./linux/kernel/git/linusw/linux-gpio

Pull GPIO fixes from Linus Walleij:
 "Here is a (hopefully last) set of GPIO fixes for the v5.3 kernel
  cycle. Two are pretty core:

   - Fix not reporting open drain/source lines to userspace as "input"

   - Fix a minor build error found in randconfigs

   - Fix a chip select quirk on the Freescale SPI

   - Fix the irqchip initialization semantic order to reflect what it
     was using the old API"

* tag 'gpio-v5.3-4' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio:
  gpio: Fix irqchip initialization order
  gpio: of: fix Freescale SPI CS quirk handling
  gpio: Fix build error of function redefinition
  gpiolib: never report open-drain/source lines as 'input' to user-space

5 years agoMerge tag 'hyperv-fixes-signed' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Sat, 24 Aug 2019 18:42:06 +0000 (11:42 -0700)]
Merge tag 'hyperv-fixes-signed' of git://git./linux/kernel/git/hyperv/linux

Pull Hyper-V fixes from Sasha Levin:

 - Fix for panics and network failures on PAE guests by Dexuan Cui.

 - Fix of a memory leak (and related cleanups) in the hyper-v keyboard
   driver by Dexuan Cui.

 - Code cleanups for hyper-v clocksource driver during the merge window
   by Dexuan Cui.

 - Fix for a false positive warning in the userspace hyper-v KVP store
   by Vitaly Kuznetsov.

* tag 'hyperv-fixes-signed' of git://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux:
  Drivers: hv: vmbus: Fix virt_to_hvpfn() for X86_PAE
  Tools: hv: kvp: eliminate 'may be used uninitialized' warning
  Input: hyperv-keyboard: Use in-place iterator API in the channel callback
  Drivers: hv: vmbus: Remove the unused "tsc_page" from struct hv_context

5 years agoMerge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
Linus Torvalds [Sat, 24 Aug 2019 18:35:25 +0000 (11:35 -0700)]
Merge tag 'arm64-fixes' of git://git./linux/kernel/git/arm64/linux

Pull arm64 fixes from Will Deacon:
 "Two KVM/arm fixes for MMIO emulation and UBSAN.

  Unusually, we're routing them via the arm64 tree as per Paolo's
  request on the list:

    https://lore.kernel.org/kvm/21ae69a2-2546-29d0-bff6-2ea825e3d968@redhat.com/

  We don't actually have any other arm64 fixes pending at the moment
  (touch wood), so I've pulled from Marc, written a merge commit, tagged
  the result and run it through my build/boot/bisect scripts"

* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
  KVM: arm/arm64: VGIC: Properly initialise private IRQ affinity
  KVM: arm/arm64: Only skip MMIO insn once

5 years agoMerge tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi
Linus Torvalds [Sat, 24 Aug 2019 18:26:51 +0000 (11:26 -0700)]
Merge tag 'scsi-fixes' of git://git./linux/kernel/git/jejb/scsi

Pull SCSI fixes from James Bottomley:
 "Four fixes, three for edge conditions which don't occur very often.
  The lpfc fix mitigates memory exhaustion for some high CPU systems"

* tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
  scsi: lpfc: Mitigate high memory pre-allocation by SCSI-MQ
  scsi: ufs: Fix NULL pointer dereference in ufshcd_config_vreg_hpm()
  scsi: target: tcmu: avoid use-after-free after command timeout
  scsi: qla2xxx: Fix gnl.l memory leak on adapter init failure

5 years agoMerge tag 'xfs-5.3-fixes-6' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux
Linus Torvalds [Sat, 24 Aug 2019 18:21:26 +0000 (11:21 -0700)]
Merge tag 'xfs-5.3-fixes-6' of git://git./fs/xfs/xfs-linux

Pull xfs fix from Darrick Wong:
 "A single patch that fixes a xfs lockup problem when a chown/chgrp
  operation fails due to running out of quota. It has survived the usual
  xfstests runs and merges cleanly with this morning's master:

   - Fix a forgotten inode unlock when chown/chgrp fail due to quota"

* tag 'xfs-5.3-fixes-6' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux:
  xfs: fix missing ILOCK unlock when xfs_setattr_nonsize fails due to EDQUOT

5 years agoMerge tag 'drm-fixes-2019-08-24' of git://anongit.freedesktop.org/drm/drm
Linus Torvalds [Sat, 24 Aug 2019 18:16:04 +0000 (11:16 -0700)]
Merge tag 'drm-fixes-2019-08-24' of git://anongit.freedesktop.org/drm/drm

Pull more drm fixes from Dave Airlie:
 "Although the tree built for me fine on arm here, it appears either
  header cleanups in next or some kconfig combo it breaks, so this
  contains a fix to mediatek to include dma-mapping.h explicitly.

  There was also one nouveau fix that came in late that I was going to
  leave until next week, but since I was sending this I thought it may
  as well be in here:

  mediatek:
   - fix build in some cases

  nouveau:
   - fix hang with i2c and mst docks"

* tag 'drm-fixes-2019-08-24' of git://anongit.freedesktop.org/drm/drm:
  drm/mediatek: include dma-mapping header
  drm/nouveau: Don't retry infinitely when receiving no data on i2c over AUX

5 years agoMerge tag 'kvmarm-fixes-for-5.3-3' of git://git.kernel.org/pub/scm/linux/kernel/git...
Will Deacon [Sat, 24 Aug 2019 11:45:20 +0000 (12:45 +0100)]
Merge tag 'kvmarm-fixes-for-5.3-3' of git://git./linux/kernel/git/kvmarm/kvmarm into kvm/fixes

Pull KVM/arm fixes from Marc Zyngier as per Paulo's request at:

  https://lkml.kernel.org/r/21ae69a2-2546-29d0-bff6-2ea825e3d968@redhat.com

  "One (hopefully last) set of fixes for KVM/arm for 5.3: an embarassing
   MMIO emulation regression, and a UBSAN splat. Oh well...

   - Don't overskip instructions on MMIO emulation

   - Fix UBSAN splat when initializing PPI priorities"

* tag 'kvmarm-fixes-for-5.3-3' of git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm:
  KVM: arm/arm64: VGIC: Properly initialise private IRQ affinity
  KVM: arm/arm64: Only skip MMIO insn once

5 years agodrm/mediatek: include dma-mapping header
Dave Airlie [Sat, 24 Aug 2019 05:07:07 +0000 (15:07 +1000)]
drm/mediatek: include dma-mapping header

Although it builds fine here in my arm cross compile, it seems
either via some other patches in -next or some Kconfig combination,
this fails to build for everyone.

Include linux/dma-mapping.h should fix it.

Signed-off-by: Dave Airlie <airlied@redhat.com>
5 years agoMerge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma
Linus Torvalds [Fri, 23 Aug 2019 21:53:09 +0000 (14:53 -0700)]
Merge tag 'for-linus' of git://git./linux/kernel/git/rdma/rdma

Pull rdma fixes from Doug Ledford:
 "No beating around the bush: this is a monster pull request for an -rc5
  kernel. Intel hit me with a series of fixes for TID processing.
  Mellanox hit me with a series for their UMR memory support.

  And we had one fix for siw that fixes the 32bit build warnings and
  because of the number of casts that had to be changed to properly
  silence the warnings, that one patch alone is a full 40% of the LOC of
  this entire pull request. Given that this is the initial release
  kernel for siw, I'm trying to fix anything in it that we can, so that
  adds to the impetus to take fixes for it like this one.

  I had to do a rebase early in the week. Jason had thought he put a
  patch on the rc queue that he needed to be there so he could base some
  work off of it, and it had actually not been placed there. So he asked
  me (on Tuesday) to fix that up before pushing my wip branch to the
  official rc branch. I did, and that's why the early patches look like
  they were all committed at the same time on Tuesday. That bunch had
  been in my queue prior.

  The various patches all pass my test for being legitimate fixes and
  not attempts to slide new features or development into a late rc.
  Well, they were all fixes with the exception of a couple clean up
  patches people wrote for making the fixes they also wrote better (like
  a cleanup patch to move UMR checking into a function so that the
  remaining UMR fix patches can reference that function), so I left
  those in place too.

  My apologies for the LOC count and the number of patches here, it's
  just how the cards fell this cycle.

  Summary:

   - Fix siw buffer mapping issue

   - Fix siw 32/64 casting issues

   - Fix a KASAN access issue in bnxt_re

   - Fix several memory leaks (hfi1, mlx4)

   - Fix a NULL deref in cma_cleanup

   - Fixes for UMR memory support in mlx5 (4 patch series)

   - Fix namespace check for restrack

   - Fixes for counter support

   - Fixes for hfi1 TID processing (5 patch series)

   - Fix potential NULL deref in siw

   - Fix memory page calculations in mlx5"

* tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma: (21 commits)
  RDMA/siw: Fix 64/32bit pointer inconsistency
  RDMA/siw: Fix SGL mapping issues
  RDMA/bnxt_re: Fix stack-out-of-bounds in bnxt_qplib_rcfw_send_message
  infiniband: hfi1: fix memory leaks
  infiniband: hfi1: fix a memory leak bug
  IB/mlx4: Fix memory leaks
  RDMA/cma: fix null-ptr-deref Read in cma_cleanup
  IB/mlx5: Block MR WR if UMR is not possible
  IB/mlx5: Fix MR re-registration flow to use UMR properly
  IB/mlx5: Report and handle ODP support properly
  IB/mlx5: Consolidate use_umr checks into single function
  RDMA/restrack: Rewrite PID namespace check to be reliable
  RDMA/counters: Properly implement PID checks
  IB/core: Fix NULL pointer dereference when bind QP to counter
  IB/hfi1: Drop stale TID RDMA packets that cause TIDErr
  IB/hfi1: Add additional checks when handling TID RDMA WRITE DATA packet
  IB/hfi1: Add additional checks when handling TID RDMA READ RESP packet
  IB/hfi1: Unsafe PSN checking for TID RDMA READ Resp packet
  IB/hfi1: Drop stale TID RDMA packets
  RDMA/siw: Fix potential NULL de-ref
  ...

5 years agoMerge tag 'for-linus-20190823' of git://git.kernel.dk/linux-block
Linus Torvalds [Fri, 23 Aug 2019 21:45:45 +0000 (14:45 -0700)]
Merge tag 'for-linus-20190823' of git://git.kernel.dk/linux-block

Pull block fixes from Jens Axboe:
 "Here's a set of fixes that should go into this release. This contains:

   - Three minor fixes for NVMe.

   - Three minor tweaks for the io_uring polling logic.

   - Officially mark Song as the MD maintainer, after he's been filling
     that role sucessfully for the last 6 months or so"

* tag 'for-linus-20190823' of git://git.kernel.dk/linux-block:
  io_uring: add need_resched() check in inner poll loop
  md: update MAINTAINERS info
  io_uring: don't enter poll loop if we have CQEs pending
  nvme: Add quirk for LiteON CL1 devices running FW 22301111
  nvme: Fix cntlid validation when not using NVMEoF
  nvme-multipath: fix possible I/O hang when paths are updated
  io_uring: fix potential hang with polled IO

5 years agoMerge tag 'for-5.3/dm-fixes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/devic...
Linus Torvalds [Fri, 23 Aug 2019 17:53:34 +0000 (10:53 -0700)]
Merge tag 'for-5.3/dm-fixes-2' of git://git./linux/kernel/git/device-mapper/linux-dm

Pull device mapper fixes from Mike Snitzer:

 - Revert a DM bufio change from during the 5.3 merge window now that a
   proper fix has been made to the block loopback driver.

 - Fix DM kcopyd to wakeup so failed subjobs get completed.

 - Various fixes to DM zoned target to address error handling, and other
   small tweaks (SPDX license identifiers and fix typos).

 - Fix DM integrity range locking race by tracking whether journal has
   changed.

 - Fix DM dust target to detect reads of badblocks beyond the first 512b
   sector (applicable if blocksize is larger than 512b).

 - Fix DM persistent-data issue in both the DM btree and DM
   space-map-metadata interfaces.

 - Fix out of bounds memory access with certain DM table configurations.

* tag 'for-5.3/dm-fixes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm:
  dm table: fix invalid memory accesses with too high sector number
  dm space map metadata: fix missing store of apply_bops() return value
  dm btree: fix order of block initialization in btree_split_beneath
  dm raid: add missing cleanup in raid_ctr()
  dm zoned: fix potential NULL dereference in dmz_do_reclaim()
  dm dust: use dust block size for badblocklist index
  dm integrity: fix a crash due to BUG_ON in __journal_read_write()
  dm zoned: fix a few typos
  dm zoned: add SPDX license identifiers
  dm zoned: properly handle backing device failure
  dm zoned: improve error handling in i/o map code
  dm zoned: improve error handling in reclaim
  dm kcopyd: always complete failed jobs
  Revert "dm bufio: fix deadlock with loop device"

5 years agoMerge tag 'xfs-5.3-fixes-4' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux
Linus Torvalds [Fri, 23 Aug 2019 17:49:44 +0000 (10:49 -0700)]
Merge tag 'xfs-5.3-fixes-4' of git://git./fs/xfs/xfs-linux

Pull xfs fixes from Darrick Wong:
 "Here are a few more bug fixes that trickled in since the last pull.
  They've survived the usual xfstests runs and merge cleanly with this
  morning's master.

  I expect there to be one more pull request tomorrow for the fix to
  that quota related inode unlock bug that we were reviewing last night,
  but it will continue to soak in the testing machine for several more
  hours.

   - Fix missing compat ioctl handling for get/setlabel

   - Fix missing ioctl pointer sanitization on s390

   - Fix a page locking deadlock in the dedupe comparison code

   - Fix inadequate locking in reflink code w.r.t. concurrent directio

   - Fix broken error detection when breaking layouts"

* tag 'xfs-5.3-fixes-4' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux:
  fs/xfs: Fix return code of xfs_break_leased_layouts()
  xfs: fix reflink source file racing with directio writes
  vfs: fix page locking deadlocks when deduping files
  xfs: compat_ioctl: use compat_ptr()
  xfs: fall back to native ioctls for unhandled compat ones

5 years agoKVM: arm/arm64: VGIC: Properly initialise private IRQ affinity
Andre Przywara [Fri, 23 Aug 2019 10:34:16 +0000 (11:34 +0100)]
KVM: arm/arm64: VGIC: Properly initialise private IRQ affinity

At the moment we initialise the target *mask* of a virtual IRQ to the
VCPU it belongs to, even though this mask is only defined for GICv2 and
quickly runs out of bits for many GICv3 guests.
This behaviour triggers an UBSAN complaint for more than 32 VCPUs:
------
[ 5659.462377] UBSAN: Undefined behaviour in virt/kvm/arm/vgic/vgic-init.c:223:21
[ 5659.471689] shift exponent 32 is too large for 32-bit type 'unsigned int'
------
Also for GICv3 guests the reporting of TARGET in the "vgic-state" debugfs
dump is wrong, due to this very same problem.

Because there is no requirement to create the VGIC device before the
VCPUs (and QEMU actually does it the other way round), we can't safely
initialise mpidr or targets in kvm_vgic_vcpu_init(). But since we touch
every private IRQ for each VCPU anyway later (in vgic_init()), we can
just move the initialisation of those fields into there, where we
definitely know the VGIC type.

On the way make sure we really have either a VGICv2 or a VGICv3 device,
since the existing code is just checking for "VGICv3 or not", silently
ignoring the uninitialised case.

Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Reported-by: Dave Martin <dave.martin@arm.com>
Tested-by: Julien Grall <julien.grall@arm.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
5 years agoMerge tag 'modules-for-v5.3-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Fri, 23 Aug 2019 16:22:00 +0000 (09:22 -0700)]
Merge tag 'modules-for-v5.3-rc6' of git://git./linux/kernel/git/jeyu/linux

Pull modules fixes from Jessica Yu:
 "Fix BUG_ON() being triggered in frob_text() due to non-page-aligned
  module sections"

* tag 'modules-for-v5.3-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/jeyu/linux:
  modules: page-align module section allocations only for arches supporting strict module rwx
  modules: always page-align module section allocations

5 years agoMerge tag 'ceph-for-5.3-rc6' of git://github.com/ceph/ceph-client
Linus Torvalds [Fri, 23 Aug 2019 16:19:38 +0000 (09:19 -0700)]
Merge tag 'ceph-for-5.3-rc6' of git://github.com/ceph/ceph-client

Pull ceph fixes from Ilya Dryomov:
 "Three important fixes tagged for stable (an indefinite hang, a crash
  on an assert and a NULL pointer dereference) plus a small series from
  Luis fixing instances of vfree() under spinlock"

* tag 'ceph-for-5.3-rc6' of git://github.com/ceph/ceph-client:
  libceph: fix PG split vs OSD (re)connect race
  ceph: don't try fill file_lock on unsuccessful GETFILELOCK reply
  ceph: clear page dirty before invalidate page
  ceph: fix buffer free while holding i_ceph_lock in fill_inode()
  ceph: fix buffer free while holding i_ceph_lock in __ceph_build_xattrs_blob()
  ceph: fix buffer free while holding i_ceph_lock in __ceph_setxattr()
  libceph: allow ceph_buffer_put() to receive a NULL ceph_buffer

5 years agoRDMA/siw: Fix 64/32bit pointer inconsistency
Bernard Metzler [Thu, 22 Aug 2019 17:37:38 +0000 (19:37 +0200)]
RDMA/siw: Fix 64/32bit pointer inconsistency

Fixes improper casting between addresses and unsigned types.
Changes siw_pbl_get_buffer() function to return appropriate
dma_addr_t, and not u64.

Also fixes debug prints. Now any potentially kernel private
pointers are printed formatted as '%pK', to allow keeping that
information secret.

Fixes: d941bfe500be ("RDMA/siw: Change CQ flags from 64->32 bits")
Fixes: b0fff7317bb4 ("rdma/siw: completion queue methods")
Fixes: 8b6a361b8c48 ("rdma/siw: receive path")
Fixes: b9be6f18cf9e ("rdma/siw: transmit path")
Fixes: f29dd55b0236 ("rdma/siw: queue pair methods")
Fixes: 2251334dcac9 ("rdma/siw: application buffer management")
Fixes: 303ae1cdfdf7 ("rdma/siw: application interface")
Fixes: 6c52fdc244b5 ("rdma/siw: connection management")
Fixes: a531975279f3 ("rdma/siw: main include file")
Reported-by: Geert Uytterhoeven <geert@linux-m68k.org>
Reported-by: Jason Gunthorpe <jgg@ziepe.ca>
Reported-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Bernard Metzler <bmt@zurich.ibm.com>
Link: https://lore.kernel.org/r/20190822173738.26817-1-bmt@zurich.ibm.com
Signed-off-by: Doug Ledford <dledford@redhat.com>
5 years agoMerge tag 'drm-fixes-2019-08-23' of git://anongit.freedesktop.org/drm/drm
Linus Torvalds [Fri, 23 Aug 2019 16:03:06 +0000 (09:03 -0700)]
Merge tag 'drm-fixes-2019-08-23' of git://anongit.freedesktop.org/drm/drm

Pull drm fixes from Dave Airlie:
 "Live from the laundromat after my washing machine broke down, we have
  the 5.3-rc6 fixes. Changelog is in the tag below, but nothing too
  noteworthy in here:

  rcar-du:
   - LVDS dual-link mode fix

  mediatek:
   - of node refcount fix
   - prime buffer import fix
   - dma max seg fix

  komeda:
   - output polling fix
   - abfc format fix
   - memory-region DT fix

  amdgpu:
   - bpc display fix
   - ioctl memory leak fix
   - gfxoff fix
   - smu warnings fix

  i915:
   - HDMI mode readout fix"

* tag 'drm-fixes-2019-08-23' of git://anongit.freedesktop.org/drm/drm:
  drm/amdgpu/powerplay: silence a warning in smu_v11_0_setup_pptable
  drm/amd/display: Calculate bpc based on max_requested_bpc
  drm/amdgpu: prevent memory leaks in AMDGPU_CS ioctl
  drm/amd/amdgpu: disable MMHUB PG for navi10
  drm/amd/powerplay: remove duplicate macro smu_get_uclk_dpm_states in amdgpu_smu.h
  drm/amd/powerplay: fix variable type errors in smu_v11_0_setup_pptable
  drm/amdgpu/gfx9: update pg_flags after determining if gfx off is possible
  drm/i915: Fix HW readout for crtc_clock in HDMI mode
  drm/mediatek: mtk_drm_drv.c: Add of_node_put() before goto
  drm: rcar_lvds: Fix dual link mode operations
  drm/mediatek: set DMA max segment size
  drm/mediatek: use correct device to import PRIME buffers
  drm/omap: ensure we have a valid dma_mask
  drm/komeda: Add support for 'memory-region' DT node property
  drm/komeda: Adds internal bpp computing for arm afbc only format YU08 YU10
  drm/komeda: Initialize and enable output polling on Komeda

5 years agox86/retpoline: Don't clobber RFLAGS during CALL_NOSPEC on i386
Sean Christopherson [Thu, 22 Aug 2019 21:11:22 +0000 (14:11 -0700)]
x86/retpoline: Don't clobber RFLAGS during CALL_NOSPEC on i386

Use 'lea' instead of 'add' when adjusting %rsp in CALL_NOSPEC so as to
avoid clobbering flags.

KVM's emulator makes indirect calls into a jump table of sorts, where
the destination of the CALL_NOSPEC is a small blob of code that performs
fast emulation by executing the target instruction with fixed operands.

  adcb_al_dl:
     0x000339f8 <+0>:   adc    %dl,%al
     0x000339fa <+2>:   ret

A major motiviation for doing fast emulation is to leverage the CPU to
handle consumption and manipulation of arithmetic flags, i.e. RFLAGS is
both an input and output to the target of CALL_NOSPEC.  Clobbering flags
results in all sorts of incorrect emulation, e.g. Jcc instructions often
take the wrong path.  Sans the nops...

  asm("push %[flags]; popf; " CALL_NOSPEC " ; pushf; pop %[flags]\n"
     0x0003595a <+58>:  mov    0xc0(%ebx),%eax
     0x00035960 <+64>:  mov    0x60(%ebx),%edx
     0x00035963 <+67>:  mov    0x90(%ebx),%ecx
     0x00035969 <+73>:  push   %edi
     0x0003596a <+74>:  popf
     0x0003596b <+75>:  call   *%esi
     0x000359a0 <+128>: pushf
     0x000359a1 <+129>: pop    %edi
     0x000359a2 <+130>: mov    %eax,0xc0(%ebx)
     0x000359b1 <+145>: mov    %edx,0x60(%ebx)

  ctxt->eflags = (ctxt->eflags & ~EFLAGS_MASK) | (flags & EFLAGS_MASK);
     0x000359a8 <+136>: mov    -0x10(%ebp),%eax
     0x000359ab <+139>: and    $0x8d5,%edi
     0x000359b4 <+148>: and    $0xfffff72a,%eax
     0x000359b9 <+153>: or     %eax,%edi
     0x000359bd <+157>: mov    %edi,0x4(%ebx)

For the most part this has gone unnoticed as emulation of guest code
that can trigger fast emulation is effectively limited to MMIO when
running on modern hardware, and MMIO is rarely, if ever, accessed by
instructions that affect or consume flags.

Breakage is almost instantaneous when running with unrestricted guest
disabled, in which case KVM must emulate all instructions when the guest
has invalid state, e.g. when the guest is in Big Real Mode during early
BIOS.

Fixes: 776b043848fd2 ("x86/retpoline: Add initial retpoline support")
Fixes: 1a29b5b7f347a ("KVM: x86: Make indirect calls in emulator speculation safe")
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: stable@vger.kernel.org
Link: https://lkml.kernel.org/r/20190822211122.27579-1-sean.j.christopherson@intel.com
5 years agodm table: fix invalid memory accesses with too high sector number
Mikulas Patocka [Fri, 23 Aug 2019 13:54:09 +0000 (09:54 -0400)]
dm table: fix invalid memory accesses with too high sector number

If the sector number is too high, dm_table_find_target() should return a
pointer to a zeroed dm_target structure (the caller should test it with
dm_target_is_valid).

However, for some table sizes, the code in dm_table_find_target() that
performs btree lookup will access out of bound memory structures.

Fix this bug by testing the sector number at the beginning of
dm_table_find_target(). Also, add an "inline" keyword to the function
dm_table_get_size() because this is a hot path.

Fixes: 512875bd9661 ("dm: table detect io beyond device")
Cc: stable@vger.kernel.org
Reported-by: Zhang Tao <kontais@zoho.com>
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
5 years agogpio: Fix irqchip initialization order
Linus Walleij [Tue, 20 Aug 2019 08:05:27 +0000 (10:05 +0200)]
gpio: Fix irqchip initialization order

The new API for registering a gpio_irq_chip along with a
gpio_chip has a different semantic ordering than the old
API which added the irqchip explicitly after registering
the gpio_chip.

Move the calls to add the gpio_irq_chip *last* in the
function, so that the different hooks setting up OF and
ACPI and machine gpio_chips are called *before* we try
to register the interrupts, preserving the elder semantic
order.

This cropped up in the PL061 driver which used to work
fine with no special ACPI quirks, but started to misbehave
using the new API.

Fixes: e0d897289813 ("gpio: Implement tighter IRQ chip integration")
Cc: Thierry Reding <treding@nvidia.com>
Cc: Grygorii Strashko <grygorii.strashko@ti.com>
Cc: Andy Shevchenko <andy.shevchenko@gmail.com>
Reported-by: Wei Xu <xuwei5@hisilicon.com>
Tested-by: Wei Xu <xuwei5@hisilicon.com>
Reported-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20190820080527.11796-1-linus.walleij@linaro.org
5 years agoxfs: fix missing ILOCK unlock when xfs_setattr_nonsize fails due to EDQUOT
Darrick J. Wong [Fri, 23 Aug 2019 03:55:54 +0000 (20:55 -0700)]
xfs: fix missing ILOCK unlock when xfs_setattr_nonsize fails due to EDQUOT

Benjamin Moody reported to Debian that XFS partially wedges when a chgrp
fails on account of being out of disk quota.  I ran his reproducer
script:

# adduser dummy
# adduser dummy plugdev

# dd if=/dev/zero bs=1M count=100 of=test.img
# mkfs.xfs test.img
# mount -t xfs -o gquota test.img /mnt
# mkdir -p /mnt/dummy
# chown -c dummy /mnt/dummy
# xfs_quota -xc 'limit -g bsoft=100k bhard=100k plugdev' /mnt

(and then as user dummy)

$ dd if=/dev/urandom bs=1M count=50 of=/mnt/dummy/foo
$ chgrp plugdev /mnt/dummy/foo

and saw:

================================================
WARNING: lock held when returning to user space!
5.3.0-rc5 #rc5 Tainted: G        W
------------------------------------------------
chgrp/47006 is leaving the kernel with locks still held!
1 lock held by chgrp/47006:
 #0: 000000006664ea2d (&xfs_nondir_ilock_class){++++}, at: xfs_ilock+0xd2/0x290 [xfs]

...which is clearly caused by xfs_setattr_nonsize failing to unlock the
ILOCK after the xfs_qm_vop_chown_reserve call fails.  Add the missing
unlock.

Reported-by: benjamin.moody@gmail.com
Fixes: 253f4911f297 ("xfs: better xfs_trans_alloc interface")
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Tested-by: Salvatore Bonaccorso <carnil@debian.org>
5 years agoMerge branch 'linux-5.3' of git://github.com/skeggsb/linux into drm-fixes
Dave Airlie [Fri, 23 Aug 2019 03:53:59 +0000 (13:53 +1000)]
Merge branch 'linux-5.3' of git://github.com/skeggsb/linux into drm-fixes

Fixes i2c on DP with some docks.

Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Ben Skeggs <skeggsb@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/CACAvsv713t2_BQ44gVV7Lqic6Vwmhq0r4FB5v-t0kD1jzFrbmQ@mail.gmail.com
5 years agodrm/nouveau: Don't retry infinitely when receiving no data on i2c over AUX
Lyude Paul [Thu, 25 Jul 2019 19:40:01 +0000 (15:40 -0400)]
drm/nouveau: Don't retry infinitely when receiving no data on i2c over AUX

While I had thought I had fixed this issue in:

commit 342406e4fbba ("drm/nouveau/i2c: Disable i2c bus access after
->fini()")

It turns out that while I did fix the error messages I was seeing on my
P50 when trying to access i2c busses with the GPU in runtime suspend, I
accidentally had missed one important detail that was mentioned on the
bug report this commit was supposed to fix: that the CPU would only lock
up when trying to access i2c busses _on connected devices_ _while the
GPU is not in runtime suspend_. Whoops. That definitely explains why I
was not able to get my machine to hang with i2c bus interactions until
now, as plugging my P50 into it's dock with an HDMI monitor connected
allowed me to finally reproduce this locally.

Now that I have managed to reproduce this issue properly, it looks like
the problem is much simpler then it looks. It turns out that some
connected devices, such as MST laptop docks, will actually ACK i2c reads
even if no data was actually read:

[  275.063043] nouveau 0000:01:00.0: i2c: aux 000a: 1: 0000004c 1
[  275.063447] nouveau 0000:01:00.0: i2c: aux 000a: 00 01101000 10040000
[  275.063759] nouveau 0000:01:00.0: i2c: aux 000a: rd 00000001
[  275.064024] nouveau 0000:01:00.0: i2c: aux 000a: rd 00000000
[  275.064285] nouveau 0000:01:00.0: i2c: aux 000a: rd 00000000
[  275.064594] nouveau 0000:01:00.0: i2c: aux 000a: rd 00000000

Because we don't handle the situation of i2c ack without any data, we
end up entering an infinite loop in nvkm_i2c_aux_i2c_xfer() since the
value of cnt always remains at 0. This finally properly explains how
this could result in a CPU hang like the ones observed in the
aforementioned commit.

So, fix this by retrying transactions if no data is written or received,
and give up and fail the transaction if we continue to not write or
receive any data after 32 retries.

Signed-off-by: Lyude Paul <lyude@redhat.com>
Cc: stable@vger.kernel.org
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
5 years agodrm/amdgpu/powerplay: silence a warning in smu_v11_0_setup_pptable
Alex Deucher [Thu, 22 Aug 2019 03:25:27 +0000 (22:25 -0500)]
drm/amdgpu/powerplay: silence a warning in smu_v11_0_setup_pptable

I think gcc is confused as I don't see how size could be used
unitialized, but go ahead and silence the warning.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Evan Quan <evan.quan@amd.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190822032527.1376-1-alexander.deucher@amd.com
5 years agoMerge tag 'drm-misc-fixes-2019-08-22' of git://anongit.freedesktop.org/drm/drm-misc...
Dave Airlie [Fri, 23 Aug 2019 01:43:47 +0000 (11:43 +1000)]
Merge tag 'drm-misc-fixes-2019-08-22' of git://anongit.freedesktop.org/drm/drm-misc into drm-fixes

Fixes for v5.3-rc6:
- dma fix for omap.
- Make output polling work on komeda.
- Fix bpp computing for AFBC formats in komeda.
- Support the memory-region property in komeda.

Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/5f1fdfe3-814e-fad1-663c-7279217fc085@linux.intel.com
5 years agoMerge tag 'drm-intel-fixes-2019-08-22' of git://anongit.freedesktop.org/drm/drm-intel...
Dave Airlie [Fri, 23 Aug 2019 01:41:58 +0000 (11:41 +1000)]
Merge tag 'drm-intel-fixes-2019-08-22' of git://anongit.freedesktop.org/drm/drm-intel into drm-fixes

drm/i915 fixes for v5.3-rc6:
- fix hardware state readout for 10 bpc HDMI

Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/87sgptd114.fsf@intel.com
5 years agotimekeeping/vsyscall: Prevent math overflow in BOOTTIME update
Thomas Gleixner [Thu, 22 Aug 2019 11:00:15 +0000 (13:00 +0200)]
timekeeping/vsyscall: Prevent math overflow in BOOTTIME update

The VDSO update for CLOCK_BOOTTIME has a overflow issue as it shifts the
nanoseconds based boot time offset left by the clocksource shift. That
overflows once the boot time offset becomes large enough. As a consequence
CLOCK_BOOTTIME in the VDSO becomes a random number causing applications to
misbehave.

Fix it by storing a timespec64 representation of the offset when boot time
is adjusted and add that to the MONOTONIC base time value in the vdso data
page. Using the timespec64 representation avoids a 64bit division in the
update code.

Fixes: 44f57d788e7d ("timekeeping: Provide a generic update_vsyscall() implementation")
Reported-by: Chris Clayton <chris2553@googlemail.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Chris Clayton <chris2553@googlemail.com>
Tested-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
Link: https://lkml.kernel.org/r/alpine.DEB.2.21.1908221257580.1983@nanos.tec.linutronix.de
5 years agoum: fix time travel mode
Johannes Berg [Mon, 22 Jul 2019 07:12:56 +0000 (09:12 +0200)]
um: fix time travel mode

Unfortunately, my build fix for when time travel mode isn't
enabled broke time travel mode, because I forgot that we need
to use the timer time after the timer has been marked disabled,
and thus need to leave the time stored instead of zeroing it.

Fix that by splitting the inline into two, so we can call only
the _mode() one in the relevant code path.

Fixes: b482e48d29f1 ("um: fix build without CONFIG_UML_TIME_TRAVEL_SUPPORT")
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
5 years agoio_uring: add need_resched() check in inner poll loop
Jens Axboe [Thu, 22 Aug 2019 04:19:11 +0000 (22:19 -0600)]
io_uring: add need_resched() check in inner poll loop

The outer poll loop checks for whether we need to reschedule, and
returns to userspace if we do. However, it's possible to get stuck
in the inner loop as well, if the CPU we are running on needs to
reschedule to finish the IO work.

Add the need_resched() check in the inner loop as well. This fixes
a potential hang if the kernel is configured with
CONFIG_PREEMPT_VOLUNTARY=y.

Reported-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Tested-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
5 years agoMerge tag 'pci-v5.3-fixes-1' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci
Linus Torvalds [Thu, 22 Aug 2019 21:04:47 +0000 (14:04 -0700)]
Merge tag 'pci-v5.3-fixes-1' of git://git./linux/kernel/git/helgaas/pci

Pull PCI fixes from Bjorn Helgaas:

 - Reset both NVIDIA GPU and HDA in ThinkPad P50 quirk, which was broken
   by another quirk that enabled the HDA device (Lyude Paul)

 - Fix pciebus-howto.rst documentation filename typo (Bjorn Helgaas)

* tag 'pci-v5.3-fixes-1' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci:
  Documentation PCI: Fix pciebus-howto.rst filename typo
  PCI: Reset both NVIDIA GPU and HDA in ThinkPad P50 workaround

5 years agodm space map metadata: fix missing store of apply_bops() return value
ZhangXiaoxu [Mon, 19 Aug 2019 03:31:21 +0000 (11:31 +0800)]
dm space map metadata: fix missing store of apply_bops() return value

In commit 6096d91af0b6 ("dm space map metadata: fix occasional leak
of a metadata block on resize"), we refactor the commit logic to a new
function 'apply_bops'.  But when that logic was replaced in out() the
return value was not stored.  This may lead out() returning a wrong
value to the caller.

Fixes: 6096d91af0b6 ("dm space map metadata: fix occasional leak of a metadata block on resize")
Cc: stable@vger.kernel.org
Signed-off-by: ZhangXiaoxu <zhangxiaoxu5@huawei.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
5 years agodm btree: fix order of block initialization in btree_split_beneath
ZhangXiaoxu [Sat, 17 Aug 2019 05:32:40 +0000 (13:32 +0800)]
dm btree: fix order of block initialization in btree_split_beneath

When btree_split_beneath() splits a node to two new children, it will
allocate two blocks: left and right.  If right block's allocation
failed, the left block will be unlocked and marked dirty.  If this
happened, the left block'ss content is zero, because it wasn't
initialized with the btree struct before the attempot to allocate the
right block.  Upon return, when flushing the left block to disk, the
validator will fail when check this block.  Then a BUG_ON is raised.

Fix this by completely initializing the left block before allocating and
initializing the right block.

Fixes: 4dcb8b57df359 ("dm btree: fix leak of bufio-backed block in btree_split_beneath error path")
Cc: stable@vger.kernel.org
Signed-off-by: ZhangXiaoxu <zhangxiaoxu5@huawei.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>