Pavel Rojtberg [Mon, 19 Oct 2015 07:06:58 +0000 (00:06 -0700)]
Input: xpad - fix clash of presence handling with LED setting
Do not call xpad_identify_controller at init with wireless devices: it
conflicts with the already sent presence packet and will be called by
xpad360w_process_packet as needed anyway.
Signed-off-by: Pavel Rojtberg <rojtberg@gmail.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Franklin S Cooper Jr [Fri, 16 Oct 2015 22:34:41 +0000 (15:34 -0700)]
Input: edt-ft5x06 - work around FT5506 firmware bug
In the touchscreen controller ISR, reading the tsc starting from
register 0x2 causes the tsc to infrequently update the detected
finger's x and y coordinate. The irq pin toggles at a fast rate to
indicate touch events are happening. However, the tsc on average
updates the touch point's x and y value every ~100 ms which is much
slower than the advertised rate of 100+ Hz. This leads to multiple reads
within this ~100 ms time window returning the same value.
Example:
X: 10 , Y: 30
X: 10 , Y: 30
X: 10, Y: 30
..
// After 100 ms
X: 300, Y: 300
X: 300, y: 300
..
// After 100 ms
X: 1743, Y: 621
X: 1743, Y: 621
For some reason if instead of starting to read at register 0x2 you
start reading at register 0x0 this issue isn't seen. This seems like
a quirk only seen in the EDT FT5506 so to fix this issue simply
adjust the code to start reading from 0x0. Technically this isn't wrong
so no regressions should be seen with other touchscreen controllers
supported by this driver.
Signed-off-by: Franklin S Cooper Jr <fcooper@ti.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Franklin S Cooper Jr [Fri, 16 Oct 2015 22:34:26 +0000 (15:34 -0700)]
Input: edt-ft5x06 - add support for FT5506
FT5506 is essentially the same as other FT5x06 devices other than
supporting 10 support points.
Signed-off-by: Franklin S Cooper Jr <fcooper@ti.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Franklin S Cooper Jr [Fri, 16 Oct 2015 22:34:16 +0000 (15:34 -0700)]
Input: edt-ft5x06 - add support for different max support points
Update the code so that the maximum supported points aren't hard coded but
can be changed.
Set the maximum support points based on the data passed along side the
compatible field.
Signed-off-by: Franklin S Cooper Jr <fcooper@ti.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Franklin S Cooper Jr [Fri, 16 Oct 2015 22:34:05 +0000 (15:34 -0700)]
Input: edt-ft5x06 - use max support points to determine how much to read
Calculate the amount of data that needs to be read for the specified max
number of support points. If the maximum number of support points changes
then the amount that is read from the touch screen controller should
reflect this.
Signed-off-by: Franklin S Cooper Jr <fcooper@ti.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Ezequiel Garcia [Wed, 14 Oct 2015 06:39:50 +0000 (23:39 -0700)]
Input: rotary-encoder - add support for quarter-period mode
Some encoders have both outputs low in stable states, others also have
a stable state with both outputs high (half-period mode) and some have
a stable state in all steps (quarter-period mode). The driver used to
support the former states and with this change it can also support the
later.
This commit also deprecates the 'half-period' property and introduces
a new property 'steps-per-period'. This property specifies the
number of steps (stable states) produced by the rotary encoder
for each GPIO period.
Signed-off-by: Guido Martínez <guido@vanguardiasur.com.ar>
Signed-off-by: Ezequiel Garcia <ezequiel@vanguardiasur.com.ar>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Ben Gamari [Wed, 14 Oct 2015 06:37:28 +0000 (23:37 -0700)]
Input: rotary-encoder - use of_property_read_bool
This commit makes uses of_property_read_bool() to read
boolean properties. This is just cosmetic cleanup.
Signed-off-by: Ben Gamari <bgamari.foss@gmail.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Elias Vanderstuyft [Thu, 15 Oct 2015 00:29:37 +0000 (17:29 -0700)]
Input: document and check on implicitly defined FF_MAX_EFFECTS
There is an undocumented upper bound for the total number of ff effects:
FF_GAIN (= 96).
This can be found as follows:
- user: write(EV_FF, effect_id, iterations)
calls kernel: ff->playback(effect_id, ...): starts effect "effect_id"
- user: write(EV_FF, FF_GAIN, gain)
calls kernel: ff->set_gain(gain, ...): sets gain
A collision occurs when effect_id equals FF_GAIN.
According to input_ff_event(),
FF_GAIN is the smallest value where a collision occurs.
Therefore the greatest safe value for effect_id is FF_GAIN - 1,
and thus the total number of effects should never exceed FF_GAIN.
Define FF_MAX_EFFECTS as FF_GAIN and check on this limit in ff-core.
Signed-off-by: Elias Vanderstuyft <elias.vds@gmail.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Elias Vanderstuyft [Mon, 21 Sep 2015 22:59:11 +0000 (15:59 -0700)]
Input: fix EVIOCSFF macro inconsistency by using _IOW()
Just like the EVIOCSABS(abs) macro, use the more compact
_IOW(..., type) instead of _IOC(_IOC_WRITE, ..., sizeof(type))
for the EVIOCSFF macro.
Signed-off-by: Elias Vanderstuyft <elias.vds@gmail.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Hans de Goede [Thu, 15 Oct 2015 00:06:08 +0000 (17:06 -0700)]
devicetree: bindings: Use linux-event-codes.h for evdev codes
Add a symlink to uapi/linux/linux-event-codes.h, and include that
instead of (re)defining all the evdev type and code values in
dt-bindings/input/input.h. This way we do not need to keep all the event
codes synced manually.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Hans de Goede [Thu, 15 Oct 2015 00:03:35 +0000 (17:03 -0700)]
Input: add input-event-codes header file
Add input-event-codes header file and move all type and axis defines
there.
The purpose of this new header file is to have a single canonical source
for event-codes which can be used outside of C-code too. One example of
such usage is the use of event-codes in devicetree source files.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Hans de Goede [Wed, 14 Oct 2015 23:44:35 +0000 (16:44 -0700)]
Input: gpio_keys_polled - add support for abs/rel axis
This changAdd support for EV_ABS / EV_REL events to the gpio-keys-polled driver.
The driver already allows specifying what type of events (key / rel / abs)
a button generates when pressed, but for rel / abs axis we also need to
specify which value this specific gpio represents.
One use case is digital joysticks / direction-pads which are hooked up to
gpio, in this case we've left and right buttons which we want to map to
EV_ABS, ABS_X and we want generate events for left with a value of -1 and
for right with a value of +1 (and similar for up / down and ABS_Y).
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Vignesh R [Wed, 14 Oct 2015 06:31:39 +0000 (23:31 -0700)]
Input: pixcir_i2c_ts - remove wakeirq related code from pixcir driver
With commit
3fffd1283927 ("i2c: allow specifying separate wakeup
interrupt in device tree") wakeirq is managed by i2c-core, so remove
wakeirq related code from pixcir_i2c_ts driver.
Signed-off-by: Vignesh R <vigneshr@ti.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Sylvain Rochet [Wed, 14 Oct 2015 06:24:36 +0000 (23:24 -0700)]
Input: rotary_encoder - add wake up support
This patch adds wake up support to GPIO rotary encoders.
Signed-off-by: Sylvain Rochet <sylvain.rochet@finsecur.com>
Reviewed-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Petri Gynther [Wed, 14 Oct 2015 06:13:55 +0000 (23:13 -0700)]
Input: improve autorepeat initialization
Add new function input_enable_softrepeat() that allows drivers to
initialize their own values for input_dev->rep[REP_DELAY] and
input_dev->rep[REP_PERIOD], but also use the software autorepeat
functionality from input.c.
For example, a HID driver could do:
static void xyz_input_configured(struct hid_device *hid,
struct hid_input *hidinput)
{
input_enable_softrepeat(hidinput->input, 400, 100);
}
static struct hid_driver xyz_driver = {
.input_configured = xyz_input_configured,
}
Signed-off-by: Petri Gynther <pgynther@google.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Pavel Rojtberg [Sat, 10 Oct 2015 16:36:17 +0000 (09:36 -0700)]
Input: xpad - query wireless controller state at init
When we initialize the driver/device, we really don't know how many
controllers are connected. So send a "query presence" command to the
base-station. (Command discovered by Zachary Lund)
Presence packet taken from:
https://github.com/computerquip/xpad5
Signed-off-by: Pavel Rojtberg <rojtberg@gmail.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Pierre-Loup A. Griffais [Sat, 10 Oct 2015 16:34:17 +0000 (09:34 -0700)]
Input: xpad - move the input device creation to a new function
To allow us to later create / destroy the input device from the urb
callback, we need to initialize/ deinitialize the input device from a
separate function. So pull that logic out now to make later patches
more "obvious" as to what they do.
Signed-off-by: "Pierre-Loup A. Griffais" <pgriffais@valvesoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Pavel Rojtberg <rojtberg@gmail.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Pavel Rojtberg [Sat, 10 Oct 2015 16:33:52 +0000 (09:33 -0700)]
Input: xpad - x360w: report dpad as buttons and axes
as discussed here[0], x360w is the only pad that maps dpad_to_button.
This is bad for downstream developers as they have to differ between
x360 and x360w which is not intuitive.
This patch implements the suggested solution of exposing the dpad both
as axes and as buttons. This retains backward compatibility with software
already dealing with the difference while makes new software work as
expected across x360/ x360w pads.
[0] http://www.spinics.net/lists/linux-input/msg34421.html
Signed-off-by: Pavel Rojtberg <rojtberg@gmail.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Pavel Rojtberg [Sat, 10 Oct 2015 16:32:55 +0000 (09:32 -0700)]
Input: xpad - factor out URB submission in xpad_play_effect
Move submission logic to a single point at the end of the function.
This makes it easy to add locking/ queuing code later on.
Signed-off-by: Pavel Rojtberg <rojtberg@gmail.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Pavel Rojtberg [Wed, 7 Oct 2015 00:07:31 +0000 (17:07 -0700)]
Input: xpad - remove needless bulk out URB used for LED setup
This code was probably wrong ever since and is redundant with
xpad_send_led_command. Both try to send a similar command to the xbox360
controller. However xpad_send_led_command correctly uses the pad_nr instead
of bInterfaceNumber to select the led and re-uses the irq_out URB instead
of creating a new one.
Note that this change only affects the two supported wireless controllers.
Tested using the xbox360 wireless controller (PC).
Signed-off-by: Pavel Rojtberg <rojtberg@gmail.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Pavel Rojtberg [Sat, 10 Oct 2015 17:00:49 +0000 (10:00 -0700)]
Input: xpad - use ida() for finding the pad_nr
The pad_nr corresponds to the lit up LED on the controller. Therefore there
should be no gaps when enumerating. Currently a LED is only re-assigned
after a controller is re-connected 4 times.
This patch uses ida to track connected pads - this way we can re-assign
freed up pad number immediately.
Consider the following case:
1. pad A is connected and gets pad_nr = 0
2. pad B is connected and gets pad_nr = 1
3. pad A is disconnected
4. pad A is connected again
using ida_simple_get() controller A now correctly gets pad_nr = 0 again.
Signed-off-by: Pavel Rojtberg <rojtberg@gmail.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Pavel Rojtberg [Wed, 7 Oct 2015 00:06:16 +0000 (17:06 -0700)]
Input: xpad - clarify LED enumeration
Rename led_no -> pad_nr: the number stored there is not the LED number - it
gets translated later on to a LED number in xpad_identify_controller;
Signed-off-by: Pavel Rojtberg <rojtberg@gmail.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Dario Scarpa [Wed, 7 Oct 2015 00:04:36 +0000 (17:04 -0700)]
Input: xpad - fix Razer Atrox Arcade Stick button mapping
The "Razer Atrox Arcade Stick" features 10 buttons, and two of them (LT/RT)
don't work properly. Change its definition in xpad_device[] (mapping
field) to fix.
Signed-off-by: Dario Scarpa <dario.scarpa@duskzone.it>
Signed-off-by: Pavel Rojtberg <rojtberg@gmail.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Erik Lundgren [Wed, 7 Oct 2015 00:04:11 +0000 (17:04 -0700)]
Input: xpad - add Covert Forces edition of the Xbox One controller
It is identical to the Xbox One controller but has a different product ID.
Signed-off-by: Pavel Rojtberg <rojtberg@gmail.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Dmitry Torokhov [Wed, 7 Oct 2015 00:00:36 +0000 (17:00 -0700)]
Input: ft6236 - change module license string to match copyright notice
The copyright/license notice says that the code is licensed under GPL v2
only (not GPL v2+), so let's use proper string in MODULE_LICENSE().
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Fengguang Wu [Tue, 6 Oct 2015 22:37:02 +0000 (15:37 -0700)]
Input: ft6236 - do not explicitly set driver's owner
There is no need to explicitly set .owner for the driver, the core will do
it for us.
Signed-off-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Franklin S Cooper Jr [Tue, 6 Oct 2015 22:24:34 +0000 (15:24 -0700)]
Input: edt-ft5x06 - do not call desc_to_gpio for invalid gpios
Since reset and wake pin are optional the gpio structure for those
pins may be null. Therefore, they can't be blindly passed to
desc_to_gpio.
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Franklin S Cooper Jr <fcooper@ti.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Javier Martinez Canillas [Tue, 6 Oct 2015 22:23:36 +0000 (15:23 -0700)]
Input: joydev - fix possible ERR_PTR() dereferencing
Commit
5702222c9a7a ("Input: joydev - use memdup_user() to duplicate
memory from user-space") changed the kmalloc() and copy_from_user()
with a single call to memdup_user() but wrongly used the same error
path than the old code in which the buffer allocated by kmalloc() was
freed if copy_from_user() failed.
This is of course wrong since if memdup_user() fails, no memory was
allocated and the error in the error-valued pointer should be returned.
Fixes: 5702222c9a7a ("Input: joydev - use memdup_user() to duplicate
memory from user-space")
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Yoichi Yuasa [Sat, 19 Sep 2015 18:34:30 +0000 (11:34 -0700)]
Input: add support for ROHM BU21023/24 touchscreen
This adds support for ROHM BU21023/24 Dual touch resistive touchscreens.
Signed-off-by: Yoichi Yuasa <yuasa@linux-mips.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Sudip Mukherjee [Tue, 29 Sep 2015 23:04:36 +0000 (16:04 -0700)]
Input: parkbd - use parallel port device model
Modify parkbd driver to use the new Parallel Port device model.
Signed-off-by: Sudip Mukherjee <sudip@vectorindia.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Dmitry Torokhov [Tue, 6 Oct 2015 00:36:38 +0000 (17:36 -0700)]
Merge tag 'v4.3-rc4' into next
Merge with mainline to sync up with changes to parkbd driver.
Sudip Mukherjee [Tue, 6 Oct 2015 00:23:08 +0000 (17:23 -0700)]
Input: turbografx - store object in correct index
The variable i is used to check the port to attach to and we are
supposed to save the reference of struct tgfx in the location given by
tgfx_base[i]. But after finding out the index, i is getting modified
again so we saved in a wrong index.
Fixes: 4de27a638a99 ("Input: turbografx - use parallel port device model")
Signed-off-by: Sudip Mukherjee <sudip@vectorindia.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Sudip Mukherjee [Tue, 6 Oct 2015 00:22:58 +0000 (17:22 -0700)]
Input: gamecon - store object at correct index
The variable i is used to check the port to attach to and we are
supposed to save the reference of struct gc in the location given by
gc_base[i]. But after finding out the index, i is getting modified again
so we saved in a wrong index.
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Fixes: a517e87c3dfc ("Input: gamecon - use parallel port device model")
Signed-off-by: Sudip Mukherjee <sudip@vectorindia.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Sudip Mukherjee [Tue, 6 Oct 2015 00:22:47 +0000 (17:22 -0700)]
Input: db9 - store object at correct index
The variable i is used to check the port to attach to and we are
supposed to save the reference of struct db9 in the location given by
db9_base[i]. But after finding out the index, i is getting modified again
so we saved in a wrong index.
While at it mark db9_base[i] as NULL after it is freed.
Fixes: 2260c419b52b ("Input: db9 - use parallel port device model")
Signed-off-by: Sudip Mukherjee <sudip@vectorindia.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Linus Torvalds [Sun, 4 Oct 2015 15:57:17 +0000 (16:57 +0100)]
Linux 4.3-rc4
Linus Torvalds [Sun, 4 Oct 2015 15:31:13 +0000 (16:31 +0100)]
Merge branch 'strscpy' of git://git./linux/kernel/git/cmetcalf/linux-tile
Pull strscpy string copy function implementation from Chris Metcalf.
Chris sent this during the merge window, but I waffled back and forth on
the pull request, which is why it's going in only now.
The new "strscpy()" function is definitely easier to use and more secure
than either strncpy() or strlcpy(), both of which are horrible nasty
interfaces that have serious and irredeemable problems.
strncpy() has a useless return value, and doesn't NUL-terminate an
overlong result. To make matters worse, it pads a short result with
zeroes, which is a performance disaster if you have big buffers.
strlcpy(), by contrast, is a mis-designed "fix" for strlcpy(), lacking
the insane NUL padding, but having a differently broken return value
which returns the original length of the source string. Which means
that it will read characters past the count from the source buffer, and
you have to trust the source to be properly terminated. It also makes
error handling fragile, since the test for overflow is unnecessarily
subtle.
strscpy() avoids both these problems, guaranteeing the NUL termination
(but not excessive padding) if the destination size wasn't zero, and
making the overflow condition very obvious by returning -E2BIG. It also
doesn't read past the size of the source, and can thus be used for
untrusted source data too.
So why did I waffle about this for so long?
Every time we introduce a new-and-improved interface, people start doing
these interminable series of trivial conversion patches.
And every time that happens, somebody does some silly mistake, and the
conversion patch to the improved interface actually makes things worse.
Because the patch is mindnumbing and trivial, nobody has the attention
span to look at it carefully, and it's usually done over large swatches
of source code which means that not every conversion gets tested.
So I'm pulling the strscpy() support because it *is* a better interface.
But I will refuse to pull mindless conversion patches. Use this in
places where it makes sense, but don't do trivial patches to fix things
that aren't actually known to be broken.
* 'strscpy' of git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile:
tile: use global strscpy() rather than private copy
string: provide strscpy()
Make asm/word-at-a-time.h available on all architectures
Linus Torvalds [Sun, 4 Oct 2015 10:47:28 +0000 (11:47 +0100)]
Merge tag 'md/4.3-fixes' of git://neil.brown.name/md
Pull md fixes from Neil Brown:
"Assorted fixes for md in 4.3-rc.
Two tagged for -stable, and one is really a cleanup to match and
improve kmemcache interface.
* tag 'md/4.3-fixes' of git://neil.brown.name/md:
md/bitmap: don't pass -1 to bitmap_storage_alloc.
md/raid1: Avoid raid1 resync getting stuck
md: drop null test before destroy functions
md: clear CHANGE_PENDING in readonly array
md/raid0: apply base queue limits *before* disk_stack_limits
md/raid5: don't index beyond end of array in need_this_block().
raid5: update analysis state for failed stripe
md: wait for pending superblock updates before switching to read-only
Linus Torvalds [Sun, 4 Oct 2015 10:41:58 +0000 (11:41 +0100)]
Merge branch 'upstream' of git://git.linux-mips.org/ralf/upstream-linus
Pull MIPS updates from Ralf Baechle:
"This week's round of MIPS fixes:
- Fix JZ4740 build
- Fix fallback to GFP_DMA
- FP seccomp in case of ENOSYS
- Fix bootmem panic
- A number of FP and CPS fixes
- Wire up new syscalls
- Make sure BPF assembler objects can properly be disassembled
- Fix BPF assembler code for MIPS I"
* 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus:
MIPS: scall: Always run the seccomp syscall filters
MIPS: Octeon: Fix kernel panic on startup from memory corruption
MIPS: Fix R2300 FP context switch handling
MIPS: Fix octeon FP context switch handling
MIPS: BPF: Fix load delay slots.
MIPS: BPF: Do all exports of symbols with FEXPORT().
MIPS: Fix the build on jz4740 after removing the custom gpio.h
MIPS: CPS: #ifdef on CONFIG_MIPS_MT_SMP rather than CONFIG_MIPS_MT
MIPS: CPS: Don't include MT code in non-MT kernels.
MIPS: CPS: Stop dangling delay slot from has_mt.
MIPS: dma-default: Fix 32-bit fall back to GFP_DMA
MIPS: Wire up userfaultfd and membarrier syscalls.
Linus Torvalds [Sun, 4 Oct 2015 10:40:09 +0000 (11:40 +0100)]
Merge branch 'irq-urgent-for-linus' of git://git./linux/kernel/git/tip/tip
Pull irq fixes from Thomas Gleixner:
"This update contains:
- Fix for a long standing race affecting /proc/irq/NNN
- One line fix for ARM GICV3-ITS counting the wrong data
- Warning silencing in ARM GICV3-ITS. Another GCC trying to be
overly clever issue"
* 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
irqchip/gic-v3-its: Count additional LPIs for the aliased devices
irqchip/gic-v3-its: Silence warning when its_lpi_alloc_chunks gets inlined
genirq: Fix race in register_irq_proc()
Markos Chandras [Fri, 25 Sep 2015 07:17:42 +0000 (08:17 +0100)]
MIPS: scall: Always run the seccomp syscall filters
The MIPS syscall handler code used to return -ENOSYS on invalid
syscalls. Whilst this is expected, it caused problems for seccomp
filters because the said filters never had the change to run since
the code returned -ENOSYS before triggering them. This caused
problems on the chromium testsuite for filters looking for invalid
syscalls. This has now changed and the seccomp filters are always
run even if the syscall is invalid. We return -ENOSYS once we
return from the seccomp filters. Moreover, similar codepaths have
been merged in the process which simplifies somewhat the overall
syscall code.
Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/11236/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Linus Torvalds [Sat, 3 Oct 2015 14:53:05 +0000 (10:53 -0400)]
Merge branch 'x86-urgent-for-linus' of git://git./linux/kernel/git/tip/tip
Pull x86 fixes from Ingo Molnar:
"Fixes all around the map: W+X kernel mapping fix, WCHAN fixes, two
build failure fixes for corner case configs, x32 header fix and a
speling fix"
* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/headers/uapi: Fix __BITS_PER_LONG value for x32 builds
x86/mm: Set NX on gap between __ex_table and rodata
x86/kexec: Fix kexec crash in syscall kexec_file_load()
x86/process: Unify 32bit and 64bit implementations of get_wchan()
x86/process: Add proper bound checks in 64bit get_wchan()
x86, efi, kasan: Fix build failure on !KASAN && KMEMCHECK=y kernels
x86/hyperv: Fix the build in the !CONFIG_KEXEC_CORE case
x86/cpufeatures: Correct spelling of the HWP_NOTIFY flag
Linus Torvalds [Sat, 3 Oct 2015 14:51:41 +0000 (10:51 -0400)]
Merge branch 'timers-urgent-for-linus' of git://git./linux/kernel/git/tip/tip
Pull timer fixes from Ingo Molnar:
"An abs64() fix in the watchdog driver, and two clocksource driver
NO_IRQ assumption fixes"
* 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
clocksource: Fix abs() usage w/ 64bit values
clocksource/drivers/keystone: Fix bad NO_IRQ usage
clocksource/drivers/rockchip: Fix bad NO_IRQ usage
Linus Torvalds [Sat, 3 Oct 2015 14:46:41 +0000 (10:46 -0400)]
Merge branch 'core-urgent-for-linus' of git://git./linux/kernel/git/tip/tip
Pull EFI fixes from Ingo Molnar:
"Two EFI fixes: one for x86, one for ARM, fixing a boot crash bug that
can trigger under newer EFI firmware"
* 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
arm64/efi: Fix boot crash by not padding between EFI_MEMORY_RUNTIME regions
x86/efi: Fix boot crash by mapping EFI memmap entries bottom-up at runtime, instead of top-down
Linus Torvalds [Sat, 3 Oct 2015 14:39:31 +0000 (10:39 -0400)]
Merge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux
Pull drm fixes from Dave Airlie:
"Bunch of fixes all over the place, all pretty small: amdgpu, i915,
exynos, one qxl and one vmwgfx.
There is also a bunch of mst fixes, I left some cleanups in the series
as I didn't think it was worth splitting up the tested series"
* 'drm-fixes' of git://people.freedesktop.org/~airlied/linux: (37 commits)
drm/dp/mst: add some defines for logical/physical ports
drm/dp/mst: drop cancel work sync in the mstb destroy path (v2)
drm/dp/mst: split connector registration into two parts (v2)
drm/dp/mst: update the link_address_sent before sending the link address (v3)
drm/dp/mst: fixup handling hotplug on port removal.
drm/dp/mst: don't pass port into the path builder function
drm/radeon: drop radeon_fb_helper_set_par
drm: handle cursor_set2 in restore_fbdev_mode
drm/exynos: Staticize local function in exynos_drm_gem.c
drm/exynos: fimd: actually disable dp clock
drm/exynos: dp: remove suspend/resume functions
drm/qxl: recreate the primary surface when the bo is not primary
drm/amdgpu: only print meaningful VM faults
drm/amdgpu/cgs: remove import_gpu_mem
drm/i915: Call non-locking version of drm_kms_helper_poll_enable(), v2
drm: Add a non-locking version of drm_kms_helper_poll_enable(), v2
drm/vmwgfx: Fix a command submission hang regression
drm/exynos: remove unused mode_fixup() code
drm/exynos: remove decon_mode_fixup()
drm/exynos: remove fimd_mode_fixup()
...
Linus Torvalds [Fri, 2 Oct 2015 21:53:25 +0000 (17:53 -0400)]
Merge branch 'for-linus' of git://git./linux/kernel/git/dtor/input
Pull input layer fixes from Dmitry Torokhov:
"Fixes for two recent regressions (in Synaptics PS/2 and uinput
drivers) and some more driver fixups"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input:
Revert "Input: synaptics - fix handling of disabling gesture mode"
Input: psmouse - fix data race in __ps2_command
Input: elan_i2c - add all valid ic type for i2c/smbus
Input: zhenhua - ensure we have BITREVERSE
Input: omap4-keypad - fix memory leak
Input: serio - fix blocking of parport
Input: uinput - fix crash when using ABS events
Input: elan_i2c - expand maximum product_id form 0xFF to 0xFFFF
Input: elan_i2c - add ic type 0x03
Input: elan_i2c - don't require known iap version
Input: imx6ul_tsc - fix controller name
Input: imx6ul_tsc - use the preferred method for kzalloc()
Input: imx6ul_tsc - check for negative return value
Input: imx6ul_tsc - propagate the errors
Input: walkera0701 - fix abs() calculations on 64 bit values
Input: mms114 - remove unneded semicolons
Input: pm8941-pwrkey - remove unneded semicolon
Input: fix typo in MT documentation
Input: cyapa - fix address of Gen3 devices in device tree documentation
John Stultz [Tue, 15 Sep 2015 01:05:20 +0000 (18:05 -0700)]
clocksource: Fix abs() usage w/ 64bit values
This patch fixes one cases where abs() was being used with 64-bit
nanosecond values, where the result may be capped at 32-bits.
This potentially could cause watchdog false negatives on 32-bit
systems, so this patch addresses the issue by using abs64().
Signed-off-by: John Stultz <john.stultz@linaro.org>
Cc: Prarit Bhargava <prarit@redhat.com>
Cc: Richard Cochran <richardcochran@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: stable@vger.kernel.org
Link: http://lkml.kernel.org/r/1442279124-7309-2-git-send-email-john.stultz@linaro.org
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Linus Torvalds [Fri, 2 Oct 2015 18:54:16 +0000 (14:54 -0400)]
Merge tag 'arm64-fixes' of git://git./linux/kernel/git/arm64/linux
Pull arm64 fixes from Catalin Marinas:
- Fix for transparent huge page change_protection() logic which was
inadvertently changing a huge pmd page into a pmd table entry.
- Function graph tracer panic fix caused by the return_to_handler code
corrupting the multi-regs function return value (composite types).
* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
arm64: ftrace: fix function_graph tracer panic
arm64: Fix THP protection change logic
Linus Torvalds [Fri, 2 Oct 2015 18:51:46 +0000 (14:51 -0400)]
Merge branch 'for-linus' of git://git./linux/kernel/git/geert/linux-m68k
Pull m68k updates from Geert Uytterhoeven:
"Summary:
- Fix for accidental modification of arguments of syscall functions
- Wire up new syscalls
- Update defconfigs"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k:
m68k/defconfig: Update defconfigs for v4.3-rc1
m68k: Define asmlinkage_protect
m68k: Wire up membarrier
m68k: Wire up userfaultfd
m68k: Wire up direct socket calls
Marc Zyngier [Fri, 2 Oct 2015 15:44:06 +0000 (16:44 +0100)]
irqchip/gic-v3-its: Count additional LPIs for the aliased devices
When configuring the interrupt mapping for a new device, we
iterate over all the possible aliases to account for their
maximum MSI allocation. This was introduced by
e8137f4f5088
("irqchip: gicv3-its: Iterate over PCI aliases to generate ITS configuration").
Turns out that the code doing that is a bit braindead, and repeatedly
accounts for the same device over and over.
Fix this by counting the actual alias that is passed to us by the
core code.
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Cc: linux-arm-kernel@lists.infradead.org
Cc: Alex Shi <alex.shi@linaro.org>
Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: David Daney <ddaney.cavm@gmail.com>
Cc: Jason Cooper <jason@lakedaemon.net>
Link: http://lkml.kernel.org/r/1443800646-8074-3-git-send-email-marc.zyngier@arm.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Marc Zyngier [Fri, 2 Oct 2015 15:44:05 +0000 (16:44 +0100)]
irqchip/gic-v3-its: Silence warning when its_lpi_alloc_chunks gets inlined
More agressive inlining in recent versions of GCC have uncovered
a new set of warnings:
drivers/irqchip/irq-gic-v3-its.c: In function its_msi_prepare:
drivers/irqchip/irq-gic-v3-its.c:1148:26: warning: lpi_base may be used
uninitialized in this function [-Wmaybe-uninitialized]
dev->event_map.lpi_base = lpi_base;
^
drivers/irqchip/irq-gic-v3-its.c:1116:6: note: lpi_base was declared here
int lpi_base;
^
drivers/irqchip/irq-gic-v3-its.c:1149:25: warning: nr_lpis may be used
uninitialized in this function [-Wmaybe-uninitialized]
dev->event_map.nr_lpis = nr_lpis;
^
drivers/irqchip/irq-gic-v3-its.c:1117:6: note: nr_lpis was declared here
int nr_lpis;
^
The warning is fairly benign (there is no code path that could
actually use uninitialized variables), but let's silence it anyway
by zeroing the variables on the error path.
Reported-by: Alex Shi <alex.shi@linaro.org>
Tested-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Cc: linux-arm-kernel@lists.infradead.org
Cc: David Daney <ddaney.cavm@gmail.com>
Cc: Jason Cooper <jason@lakedaemon.net>
Link: http://lkml.kernel.org/r/1443800646-8074-2-git-send-email-marc.zyngier@arm.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Linus Torvalds [Fri, 2 Oct 2015 18:46:15 +0000 (14:46 -0400)]
Merge tag 'dmaengine-fix-4.3-rc4' of git://git.infradead.org/users/vkoul/slave-dma
Pull dmaengine fixes from Vinod Koul:
"This contains fixes spread throughout the drivers, and also fixes one
more instance of privatecnt in dmaengine.
Driver fixes summary:
- bunch of pxa_dma fixes for reuse of descriptor issue, residue and
no-requestor
- odd fixes in xgene, idma, sun4i and zxdma
- at_xdmac fixes for cleaning descriptor and block addr mode"
* tag 'dmaengine-fix-4.3-rc4' of git://git.infradead.org/users/vkoul/slave-dma:
dmaengine: pxa_dma: fix residue corner case
dmaengine: pxa_dma: fix the no-requestor case
dmaengine: zxdma: Fix off-by-one for testing valid pchan request
dmaengine: at_xdmac: clean used descriptor
dmaengine: at_xdmac: change block increment addressing mode
dmaengine: dw: properly read DWC_PARAMS register
dmaengine: xgene-dma: Fix overwritting DMA tx ring
dmaengine: fix balance of privatecnt
dmaengine: sun4i: fix unsafe list iteration
dmaengine: idma64: improve residue estimation
dmaengine: xgene-dma: fix handling xgene_dma_get_ring_size result
dmaengine: pxa_dma: fix initial list move
Noralf Trønnes [Fri, 2 Oct 2015 18:30:11 +0000 (11:30 -0700)]
Input: add support for FocalTech FT6236 touchscreen controller
This adds support for the FT6x06 and the FT6x36 family of capacitive touch
panel controllers, in particular the FT6236.
Signed-off-by: Noralf Trønnes <noralf@tronnes.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Javier Martinez Canillas [Fri, 2 Oct 2015 18:21:12 +0000 (11:21 -0700)]
Input: cyttsp - use PTR_ERR_OR_ZERO()
The PTR_ERR_OR_ZERO() helper function checks if a pointer contains an
errno code and returns it or return 0 if that's not the case. Use the
helper instead of open coding the same logic in the driver. This was
found with make coccicheck that complains with the following warning:
drivers/input/touchscreen/cyttsp4_i2c.c:53:1-3: WARNING: PTR_ERR_OR_ZERO can be used
Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Javier Martinez Canillas [Fri, 2 Oct 2015 18:20:40 +0000 (11:20 -0700)]
Input: ads7846 - use PTR_ERR_OR_ZERO()
The PTR_ERR_OR_ZERO() helper function checks if a pointer contains an
errno code and returns it or return 0 if that's not the case. Use the
helper instead of open coding the same logic in the driver. This was
found with make coccicheck that complains with the following warning:
drivers/input/touchscreen/ads7846.c:532:1-3: WARNING: PTR_ERR_OR_ZERO can be used
Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Javier Martinez Canillas [Fri, 2 Oct 2015 18:19:54 +0000 (11:19 -0700)]
Input: tps6507x-ts - simplify function return logic
The invoked function already returns zero on success or a negative
errno code so there is no need to open code the logic in the caller.
This also fixes the following make coccicheck warning:
drivers/input/touchscreen/tps6507x-ts.c:57:5-8: WARNING: end returns can be simplified
Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Javier Martinez Canillas [Fri, 2 Oct 2015 18:18:59 +0000 (11:18 -0700)]
Input: auo-pixcir-ts - simplify function return logic
The invoked function already returns zero on success or a negative
errno code so there is no need to open code the logic in the caller.
This also fixes the following make coccicheck warnings:
end returns can be simplified and declaration on line 402 can be dropped
Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Javier Martinez Canillas [Fri, 2 Oct 2015 18:15:08 +0000 (11:15 -0700)]
Input: zforce - simplify function return logic
The invoked function already returns zero on success or a negative
errno code so there is no need to open code the logic in the caller.
This also fixes the following make coccicheck warning:
end returns can be simplified and declaration on line 602 can be dropped
Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com>
Reviewed-by: Heiko Stuebner <heiko.stuebner@bq.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Javier Martinez Canillas [Fri, 2 Oct 2015 18:14:26 +0000 (11:14 -0700)]
Input: kxtj9 - remove unneeded retval variable
The retval variable isn't needed since isn't used in the function. Remove
the variable and just return 0 instead.
This also fixes the following make coccicheck warning:
drivers/input/misc/kxtj9.c:638:5-11: Unneeded variable: "retval". Return "0" on line 646
Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Javier Martinez Canillas [Fri, 2 Oct 2015 18:12:53 +0000 (11:12 -0700)]
Input: joydev - use memdup_user() to duplicate memory from user-space
The memdup_user() helper function can be used to duplicate a memory region
from user-space to kernel-space. There is no need to open code the same
logic using kmalloc() and copy_from_user() instead. This was found with
make coccicheck that reported the following warning:
drivers/input/joydev.c:447:10-17: WARNING opportunity for memdup_user
drivers/input/joydev.c:483:10-17: WARNING opportunity for memdup_user
Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Javier Martinez Canillas [Fri, 2 Oct 2015 17:49:48 +0000 (10:49 -0700)]
Input: goldfish - allow compile the driver with COMPILE_TEST
The driver depends on GOLDFISH but there isn't a build dependency
so it's a good idea to allow the driver to be built even if that
option is disabled, if the COMPILE_TEST option is enabled.
That way, the driver can be built with a config generated by make
allyesconfig and can be checked if a patch would break the build.
Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Bjorn Andersson [Fri, 2 Oct 2015 17:44:00 +0000 (10:44 -0700)]
Input: gpio_keys - don't report events on gpio failure
In the cases where the gpio chip fails to acquire the current state an
error is reported back to gpio_keys. This is currently interpreted as if
the line went high, which just confuses the developer.
This patch introduces an error print in this case and skipps the
reporting of a input event; to aid in debugging this issue.
Reported-by: John Stultz <john.stultz@linaro.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@sonymobile.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Linus Torvalds [Fri, 2 Oct 2015 18:40:57 +0000 (14:40 -0400)]
Merge branch 'for-linus' of git://git.kernel.dk/linux-block
Pull block fixes from Jens Axboe:
"Another week, another round of fixes.
These have been brewing for a bit and in various iterations, but I
feel pretty comfortable about the quality of them. They fix real
issues. The pull request is mostly blk-mq related, and the only one
not fixing a real bug, is the tag iterator abstraction from Christoph.
But it's pretty trivial, and we'll need it for another fix soon.
Apart from the blk-mq fixes, there's an NVMe affinity fix from Keith,
and a single fix for xen-blkback from Roger fixing failure to free
requests on disconnect"
* 'for-linus' of git://git.kernel.dk/linux-block:
blk-mq: factor out a helper to iterate all tags for a request_queue
blk-mq: fix racy updates of rq->errors
blk-mq: fix deadlock when reading cpu_list
blk-mq: avoid inserting requests before establishing new mapping
blk-mq: fix q->mq_usage_counter access race
blk-mq: Fix use after of free q->mq_map
blk-mq: fix sysfs registration/unregistration race
blk-mq: avoid setting hctx->tags->cpumask before allocation
NVMe: Set affinity after allocating request queues
xen/blkback: free requests on disconnection
Dmitry Torokhov [Fri, 2 Oct 2015 17:31:32 +0000 (10:31 -0700)]
Revert "Input: synaptics - fix handling of disabling gesture mode"
This reverts commit
e51e38494a8ecc18650efb0c840600637891de2c: we
actually do want the device to work in extended W mode, as this is the
mode that allows us receiving multiple contact information.
Cc: stable@vger.kernel.org
Matt Bennett [Wed, 30 Sep 2015 04:40:42 +0000 (17:40 +1300)]
MIPS: Octeon: Fix kernel panic on startup from memory corruption
During development it was found that a number of builds would panic
during the kernel init process, more specifically in 'delayed_fput()'.
The panic showed the kernel trying to access a memory address of
'0xb7fdc00' while traversing the 'delayed_fput_list' structure.
Comparing this memory address to the value of the pointer used on
builds that did not panic confirmed that the pointer on crashing
builds must have been corrupted at some stage earlier in the init
process.
By traversing the list earlier and earlier in the code it was found
that 'plat_mem_setup()' was responsible for corrupting the list.
Specifically the line:
memory = cvmx_bootmem_phy_alloc(mem_alloc_size,
__pa_symbol(&__init_end), -1,
0x100000,
CVMX_BOOTMEM_FLAG_NO_LOCKING);
Which would eventually call:
cvmx_bootmem_phy_set_size(new_ent_addr,
cvmx_bootmem_phy_get_size
(ent_addr) -
(desired_min_addr -
ent_addr));
Where 'new_ent_addr'=0x4800000 (the address of 'delayed_fput_list')
and the second argument (size)=0xb7fdc00 (the address causing the
kernel panic). The job of this part of 'plat_mem_setup()' is to
allocate chunks of memory for the kernel to use. At the start of
each chunk of memory the size of the chunk is written, hence the
value 0xb7fdc00 is written onto memory at 0x4800000, therefore the
kernel panics when it goes back to access 'delayed_fput_list' later
on in the initialisation process.
On builds that were not crashing it was found that the compiler had
placed 'delayed_fput_list' at 0x4800008, meaning it wasn't corrupted
(but something else in memory was overwritten).
As can be seen in the first function call above the code begins to
allocate chunks of memory beginning from the symbol '__init_end'.
The MIPS linker script (vmlinux.lds.S) however defines the .bss
section to begin after '__init_end'. Therefore memory within the
.bss section is allocated to the kernel to use (System.map shows
'delayed_fput_list' and other kernel structures to be in .bss).
To stop the kernel panic (and the .bss section being corrupted)
memory should begin being allocated from the symbol '_end'.
Signed-off-by: Matt Bennett <matt.bennett@alliedtelesis.co.nz>
Acked-by: David Daney <david.daney@cavium.com>
Cc: linux-mips@linux-mips.org
Cc: aleksey.makarov@auriga.com
Patchwork: https://patchwork.linux-mips.org/patch/11251/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Paul Burton [Mon, 21 Sep 2015 17:07:42 +0000 (10:07 -0700)]
MIPS: Fix R2300 FP context switch handling
Commit
1a3d59579b9f ("MIPS: Tidy up FPU context switching") removed FP
context saving from the asm-written resume function in favour of reusing
existing code to perform the same task. However it only removed the FP
context saving code from the r4k_switch.S implementation of resume.
Remove it from the r2300_switch.S implementation too in order to prevent
attempting to save the FP context twice, which would likely lead to an
exception from the second save because the FPU had already been disabled
by the first save.
This patch has only been build tested, using rbtx49xx_defconfig.
Fixes: 1a3d59579b9f ("MIPS: Tidy up FPU context switching")
Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Cc: linux-mips@linux-mips.org
Cc: Maciej W. Rozycki <macro@linux-mips.org>
Cc: linux-kernel@vger.kernel.org
Cc: Manuel Lauss <manuel.lauss@gmail.com>
Patchwork: https://patchwork.linux-mips.org/patch/11167/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Paul Burton [Mon, 21 Sep 2015 17:07:41 +0000 (10:07 -0700)]
MIPS: Fix octeon FP context switch handling
Commit
1a3d59579b9f ("MIPS: Tidy up FPU context switching") removed FP
context saving from the asm-written resume function in favour of reusing
existing code to perform the same task. However it only removed the FP
context saving code from the r4k_switch.S implementation of resume.
Octeon uses its own implementation in octeon_switch.S, so remove FP
context saving there too in order to prevent attempting to save context
twice. That formerly led to an exception from the second save as follows
because the FPU had already been disabled by the first save:
do_cpu invoked from kernel context![#1]:
CPU: 0 PID: 2 Comm: kthreadd Not tainted 4.3.0-rc2-dirty #2
task:
800000041f84a008 ti:
800000041f864000 task.ti:
800000041f864000
$ 0 :
0000000000000000 0000000010008ce1 0000000000100000 ffffffffbfffffff
$ 4 :
800000041f84a008 800000041f84ac08 800000041f84c000 0000000000000004
$ 8 :
0000000000000001 0000000000000000 0000000000000000 0000000000000001
$12 :
0000000010008ce3 0000000000119c60 0000000000000036 800000041f864000
$16 :
800000041f84ac08 800000000792ce80 800000041f84a008 ffffffff81758b00
$20 :
0000000000000000 ffffffff8175ae50 0000000000000000 ffffffff8176c740
$24 :
0000000000000006 ffffffff81170300
$28 :
800000041f864000 800000041f867d90 0000000000000000 ffffffff815f3fa0
Hi :
0000000000fa8257
Lo :
ffffffffe15cfc00
epc :
ffffffff8112821c resume+0x9c/0x200
ra :
ffffffff815f3fa0 __schedule+0x3f0/0x7d8
Status:
10008ce2 KX SX UX KERNEL EXL
Cause :
1080002c (ExcCode 0b)
PrId :
000d0601 (Cavium Octeon+)
Modules linked in:
Process kthreadd (pid: 2, threadinfo=
800000041f864000, task=
800000041f84a008, tls=
0000000000000000)
Stack :
ffffffff81604218 ffffffff815f7e08 800000041f84a008 ffffffff811681b0
800000041f84a008 ffffffff817e9878 0000000000000000 ffffffff81770000
ffffffff81768340 ffffffff81161398 0000000000000001 0000000000000000
0000000000000000 ffffffff815f4424 0000000000000000 ffffffff81161d68
ffffffff81161be8 0000000000000000 0000000000000000 0000000000000000
0000000000000000 0000000000000000 0000000000000000 ffffffff8111e16c
0000000000000000 0000000000000000 0000000000000000 0000000000000000
0000000000000000 0000000000000000 0000000000000000 0000000000000000
0000000000000000 0000000000000000 0000000000000000 0000000000000000
0000000000000000 0000000000000000 0000000000000000 0000000000000000
...
Call Trace:
[<
ffffffff8112821c>] resume+0x9c/0x200
[<
ffffffff815f3fa0>] __schedule+0x3f0/0x7d8
[<
ffffffff815f4424>] schedule+0x34/0x98
[<
ffffffff81161d68>] kthreadd+0x180/0x198
[<
ffffffff8111e16c>] ret_from_kernel_thread+0x14/0x1c
Tested using cavium_octeon_defconfig on an EdgeRouter Lite.
Fixes: 1a3d59579b9f ("MIPS: Tidy up FPU context switching")
Reported-by: Aaro Koskinen <aaro.koskinen@nokia.com>
Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Cc: linux-mips@linux-mips.org
Cc: Aleksey Makarov <aleksey.makarov@auriga.com>
Cc: linux-kernel@vger.kernel.org
Cc: Chandrakala Chavva <cchavva@caviumnetworks.com>
Cc: David Daney <david.daney@cavium.com>
Cc: Leonid Rosenboim <lrosenboim@caviumnetworks.com>
Patchwork: https://patchwork.linux-mips.org/patch/11166/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Linus Torvalds [Fri, 2 Oct 2015 12:03:04 +0000 (08:03 -0400)]
Merge tag 'mmc-v4.3-rc3' of git://git.linaro.org/people/ulf.hansson/mmc
Pull MMC fixes from Ulf Hansson:
"Here are some mmc fixes intended for v4.3 rc4:
MMC core:
- Allow users of mmc_of_parse() to succeed when CONFIG_GPIOLIB is
unset
- Prevent infinite loop of re-tuning for CRC-errors for CMD19 and
CMD21
MMC host:
- pxamci: Fix issues with card detect
- sunxi: Fix clk-delay settings"
* tag 'mmc-v4.3-rc3' of git://git.linaro.org/people/ulf.hansson/mmc:
mmc: core: fix dead loop of mmc_retune
mmc: pxamci: fix card detect with slot-gpio API
mmc: sunxi: Fix clk-delay settings
mmc: core: Don't return an error for CD/WP GPIOs when GPIOLIB is unset
Linus Torvalds [Fri, 2 Oct 2015 11:59:29 +0000 (07:59 -0400)]
Merge git://git.infradead.org/intel-iommu
Pull IOVA fixes from David Woodhouse:
"The main fix here is the first one, fixing the over-allocation of
size-aligned requests. The other patches simply make the existing
IOVA code available to users other than the Intel VT-d driver, with no
functional change.
I concede the latter really *should* have been submitted during the
merge window, but since it's basically risk-free and people are
waiting to build on top of it and it's my fault I didn't get it in, I
(and they) would be grateful if you'd take it"
* git://git.infradead.org/intel-iommu:
iommu: Make the iova library a module
iommu: iova: Export symbols
iommu: iova: Move iova cache management to the iova library
iommu/iova: Avoid over-allocating when size-aligned
Li Bin [Wed, 30 Sep 2015 02:49:55 +0000 (10:49 +0800)]
arm64: ftrace: fix function_graph tracer panic
When function graph tracer is enabled, the following operation
will trigger panic:
mount -t debugfs nodev /sys/kernel
echo next_tgid > /sys/kernel/tracing/set_ftrace_filter
echo function_graph > /sys/kernel/tracing/current_tracer
ls /proc/
------------[ cut here ]------------
[ 198.501417] Unable to handle kernel paging request at virtual address
cb88537fdc8ba316
[ 198.506126] pgd =
ffffffc008f79000
[ 198.509363] [
cb88537fdc8ba316] *pgd=
00000000488c6003, *pud=
00000000488c6003, *pmd=
0000000000000000
[ 198.517726] Internal error: Oops:
94000005 [#1] SMP
[ 198.518798] Modules linked in:
[ 198.520582] CPU: 1 PID: 1388 Comm: ls Tainted: G
[ 198.521800] Hardware name: linux,dummy-virt (DT)
[ 198.522852] task:
ffffffc0fa9e8000 ti:
ffffffc0f9ab0000 task.ti:
ffffffc0f9ab0000
[ 198.524306] PC is at next_tgid+0x30/0x100
[ 198.525205] LR is at return_to_handler+0x0/0x20
[ 198.526090] pc : [<
ffffffc0002a1070>] lr : [<
ffffffc0000907c0>] pstate:
60000145
[ 198.527392] sp :
ffffffc0f9ab3d40
[ 198.528084] x29:
ffffffc0f9ab3d40 x28:
ffffffc0f9ab0000
[ 198.529406] x27:
ffffffc000d6a000 x26:
ffffffc000b786e8
[ 198.530659] x25:
ffffffc0002a1900 x24:
ffffffc0faf16c00
[ 198.531942] x23:
ffffffc0f9ab3ea0 x22:
0000000000000002
[ 198.533202] x21:
ffffffc000d85050 x20:
0000000000000002
[ 198.534446] x19:
0000000000000002 x18:
0000000000000000
[ 198.535719] x17:
000000000049fa08 x16:
ffffffc000242efc
[ 198.537030] x15:
0000007fa472b54c x14:
ffffffffff000000
[ 198.538347] x13:
ffffffc0fada84a0 x12:
0000000000000001
[ 198.539634] x11:
ffffffc0f9ab3d70 x10:
ffffffc0f9ab3d70
[ 198.540915] x9 :
ffffffc0000907c0 x8 :
ffffffc0f9ab3d40
[ 198.542215] x7 :
0000002e330f08f0 x6 :
0000000000000015
[ 198.543508] x5 :
0000000000000f08 x4 :
ffffffc0f9835ec0
[ 198.544792] x3 :
cb88537fdc8ba316 x2 :
cb88537fdc8ba306
[ 198.546108] x1 :
0000000000000002 x0 :
ffffffc000d85050
[ 198.547432]
[ 198.547920] Process ls (pid: 1388, stack limit = 0xffffffc0f9ab0020)
[ 198.549170] Stack: (0xffffffc0f9ab3d40 to 0xffffffc0f9ab4000)
[ 198.582568] Call trace:
[ 198.583313] [<
ffffffc0002a1070>] next_tgid+0x30/0x100
[ 198.584359] [<
ffffffc0000907bc>] ftrace_graph_caller+0x6c/0x70
[ 198.585503] [<
ffffffc0000907bc>] ftrace_graph_caller+0x6c/0x70
[ 198.586574] [<
ffffffc0000907bc>] ftrace_graph_caller+0x6c/0x70
[ 198.587660] [<
ffffffc0000907bc>] ftrace_graph_caller+0x6c/0x70
[ 198.588896] Code:
aa0003f5 2a0103f4 b4000102 91004043 (
885f7c60)
[ 198.591092] ---[ end trace
6a346f8f20949ac8 ]---
This is because when using function graph tracer, if the traced
function return value is in multi regs ([x0-x7]), return_to_handler
may corrupt them. So in return_to_handler, the parameter regs should
be protected properly.
Cc: <stable@vger.kernel.org> # 3.18+
Signed-off-by: Li Bin <huawei.libin@huawei.com>
Acked-by: AKASHI Takahiro <takahiro.akashi@linaro.org>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Ralf Baechle [Fri, 2 Oct 2015 07:48:57 +0000 (09:48 +0200)]
MIPS: BPF: Fix load delay slots.
The entire bpf_jit_asm.S is written in noreorder mode because "we know
better" according to a comment. This also prevented the assembler from
throwing in the required NOPs for MIPS I processors which have no
load-use interlock, thus the load's consumer might end up using the
old value of the register from prior to the load.
Fixed by putting the assembler in reorder mode for just the affected
load instructions. This is not enough for gas to actually try to be
clever by looking at the next instruction and inserting a nop only
when needed but as the comment said "we know better", so getting gas
to unconditionally emit a NOP is just right in this case and prevents
adding further ifdefery.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Ben Hutchings [Thu, 1 Oct 2015 00:40:43 +0000 (01:40 +0100)]
x86/headers/uapi: Fix __BITS_PER_LONG value for x32 builds
On x32, gcc predefines __x86_64__ but long is only 32-bit. Use
__ILP32__ to distinguish x32.
Fixes this compiler error in perf:
tools/include/asm-generic/bitops/__ffs.h: In function '__ffs':
tools/include/asm-generic/bitops/__ffs.h:19:8: error: right shift count >= width of type [-Werror=shift-count-overflow]
word >>= 32;
^
This isn't sufficient to build perf for x32, though.
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-kernel@vger.kernel.org
Link: http://lkml.kernel.org/r/1443660043.2730.15.camel@decadent.org.uk
Signed-off-by: Ingo Molnar <mingo@kernel.org>
NeilBrown [Thu, 1 Oct 2015 06:03:38 +0000 (16:03 +1000)]
md/bitmap: don't pass -1 to bitmap_storage_alloc.
Passing -1 to bitmap_storage_alloc() causes page->index to be set to
-1, which is quite problematic.
So only pass ->cluster_slot if mddev_is_clustered().
Fixes: b97e92574c0b ("Use separate bitmaps for each nodes in the cluster")
Cc: stable@vger.kernel.org (v4.1+)
Signed-off-by: NeilBrown <neilb@suse.com>
Jes Sorensen [Wed, 16 Sep 2015 14:20:05 +0000 (10:20 -0400)]
md/raid1: Avoid raid1 resync getting stuck
close_sync() needs to set conf->next_resync to a large, but safe value
below MaxSector and use it to determine whether or not to set
start_next_window in wait_barrier()
Solution suggested by Neil Brown.
Reported-by: Nate Dailey <nate.dailey@stratus.com>
Tested-by: Xiao Ni <xni@redhat.com>
Signed-off-by: Jes Sorensen <Jes.Sorensen@redhat.com>
Signed-off-by: NeilBrown <neilb@suse.com>
Julia Lawall [Sun, 13 Sep 2015 12:15:10 +0000 (14:15 +0200)]
md: drop null test before destroy functions
Remove unneeded NULL test.
The semantic patch that makes this change is as follows:
(http://coccinelle.lip6.fr/)
// <smpl>
@@ expression x; @@
-if (x != NULL)
\(kmem_cache_destroy\|mempool_destroy\|dma_pool_destroy\)(x);
// </smpl>
Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: NeilBrown <neilb@suse.com>
Shaohua Li [Fri, 18 Sep 2015 17:20:12 +0000 (10:20 -0700)]
md: clear CHANGE_PENDING in readonly array
If faulty disks of an array are more than allowed degraded number, the
array enters error handling. It will be marked as read-only with
MD_CHANGE_PENDING/RECOVERY_NEEDED set. But currently recovery doesn't
clear CHANGE_PENDING bit for read-only array. If MD_CHANGE_PENDING is
set for a raid5 array, all returned IO will be hold on a list till the
bit is clear. But recovery nevery clears this bit, the IO is always in
pending state and nevery finish. This has bad effects like upper layer
can't get an IO error and the array can't be stopped.
Fixes: c3cce6cda162 ("md/raid5: ensure device failure recorded before write request returns.")
Signed-off-by: Shaohua Li <shli@fb.com>
Signed-off-by: NeilBrown <neilb@suse.com>
NeilBrown [Thu, 24 Sep 2015 05:47:47 +0000 (15:47 +1000)]
md/raid0: apply base queue limits *before* disk_stack_limits
Calling e.g. blk_queue_max_hw_sectors() after calls to
disk_stack_limits() discards the settings determined by
disk_stack_limits().
So we need to make those calls first.
Fixes: 199dc6ed5179 ("md/raid0: update queue parameter in a safer location.")
Cc: stable@vger.kernel.org (v2.6.35+ - please apply with 199dc6ed5179).
Reported-by: Jes Sorensen <Jes.Sorensen@redhat.com>
Signed-off-by: NeilBrown <neilb@suse.com>
NeilBrown [Thu, 24 Sep 2015 05:25:36 +0000 (15:25 +1000)]
md/raid5: don't index beyond end of array in need_this_block().
When need_this_block probably shouldn't be called when there
are more than 2 failed devices, we really don't want it to try
indexing beyond the end of the failed_num[] of fdev[] arrays.
So limit the loops to at most 2 iterations.
Reported-by: Shaohua Li <shli@fb.com>
Signed-off-by: NeilBrown <neilb@suse.de>
Shaohua Li [Fri, 18 Sep 2015 17:20:13 +0000 (10:20 -0700)]
raid5: update analysis state for failed stripe
handle_failed_stripe() makes the stripe fail, eg, all IO will return
with a failure, but it doesn't update stripe_head_state. Later
handle_stripe() has special handling for raid6 for handle_stripe_fill().
That check before handle_stripe_fill() doesn't skip the failed stripe
and we get a kernel crash in need_this_block. This patch clear the
analysis state to make sure no functions wrongly called after
handle_failed_stripe()
Signed-off-by: Shaohua Li <shli@fb.com>
Signed-off-by: NeilBrown <neilb@suse.com>
NeilBrown [Thu, 24 Sep 2015 04:00:51 +0000 (14:00 +1000)]
md: wait for pending superblock updates before switching to read-only
If a superblock update is pending, wait for it to complete before
letting md_set_readonly() switch to readonly.
Otherwise we might lose important information about a device having
failed.
For external arrays, waiting for superblock updates can wait on
user-space, so in that case, just return an error.
Reported-and-tested-by: Shaohua Li <shli@fb.com>
Signed-off-by: NeilBrown <neilb@suse.com>
Stephen Smalley [Thu, 1 Oct 2015 13:04:22 +0000 (09:04 -0400)]
x86/mm: Set NX on gap between __ex_table and rodata
Unused space between the end of __ex_table and the start of
rodata can be left W+x in the kernel page tables. Extend the
setting of the NX bit to cover this gap by starting from
text_end rather than rodata_start.
Before:
---[ High Kernel Mapping ]---
0xffffffff80000000-0xffffffff81000000 16M pmd
0xffffffff81000000-0xffffffff81600000 6M ro PSE GLB x pmd
0xffffffff81600000-0xffffffff81754000 1360K ro GLB x pte
0xffffffff81754000-0xffffffff81800000 688K RW GLB x pte
0xffffffff81800000-0xffffffff81a00000 2M ro PSE GLB NX pmd
0xffffffff81a00000-0xffffffff81b3b000 1260K ro GLB NX pte
0xffffffff81b3b000-0xffffffff82000000 4884K RW GLB NX pte
0xffffffff82000000-0xffffffff82200000 2M RW PSE GLB NX pmd
0xffffffff82200000-0xffffffffa0000000 478M pmd
After:
---[ High Kernel Mapping ]---
0xffffffff80000000-0xffffffff81000000 16M pmd
0xffffffff81000000-0xffffffff81600000 6M ro PSE GLB x pmd
0xffffffff81600000-0xffffffff81754000 1360K ro GLB x pte
0xffffffff81754000-0xffffffff81800000 688K RW GLB NX pte
0xffffffff81800000-0xffffffff81a00000 2M ro PSE GLB NX pmd
0xffffffff81a00000-0xffffffff81b3b000 1260K ro GLB NX pte
0xffffffff81b3b000-0xffffffff82000000 4884K RW GLB NX pte
0xffffffff82000000-0xffffffff82200000 2M RW PSE GLB NX pmd
0xffffffff82200000-0xffffffffa0000000 478M pmd
Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov>
Acked-by: Kees Cook <keescook@chromium.org>
Cc: <stable@vger.kernel.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-kernel@vger.kernel.org
Link: http://lkml.kernel.org/r/1443704662-3138-1-git-send-email-sds@tycho.nsa.gov
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Lee, Chun-Yi [Tue, 29 Sep 2015 12:58:57 +0000 (20:58 +0800)]
x86/kexec: Fix kexec crash in syscall kexec_file_load()
The original bug is a page fault crash that sometimes happens
on big machines when preparing ELF headers:
BUG: unable to handle kernel paging request at
ffffc90613fc9000
IP: [<
ffffffff8103d645>] prepare_elf64_ram_headers_callback+0x165/0x260
The bug is caused by us under-counting the number of memory ranges
and subsequently not allocating enough ELF header space for them.
The bug is typically masked on smaller systems, because the ELF header
allocation is rounded up to the next page.
This patch modifies the code in fill_up_crash_elf_data() by using
walk_system_ram_res() instead of walk_system_ram_range() to correctly
count the max number of crash memory ranges. That's because the
walk_system_ram_range() filters out small memory regions that
reside in the same page, but walk_system_ram_res() does not.
Here's how I found the bug:
After tracing prepare_elf64_headers() and prepare_elf64_ram_headers_callback(),
the code uses walk_system_ram_res() to fill-in crash memory regions information
to the program header, so it counts those small memory regions that
reside in a page area.
But, when the kernel was using walk_system_ram_range() in
fill_up_crash_elf_data() to count the number of crash memory regions,
it filters out small regions.
I printed those small memory regions, for example:
kexec: Get nr_ram ranges. vaddr=0xffff880077592258 paddr=0x77592258, sz=0xdc0
Based on the code in walk_system_ram_range(), this memory region
will be filtered out:
pfn = (0x77592258 + 0x1000 - 1) >> 12 = 0x77593
end_pfn = (0x77592258 + 0xfc0 -1 + 1) >> 12 = 0x77593
end_pfn - pfn = 0x77593 - 0x77593 = 0 <=== if (end_pfn > pfn) is FALSE
So, the max_nr_ranges that's counted by the kernel doesn't include
small memory regions - causing us to under-allocate the required space.
That causes the page fault crash that happens in a later code path
when preparing ELF headers.
This bug is not easy to reproduce on small machines that have few
CPUs, because the allocated page aligned ELF buffer has more free
space to cover those small memory regions' PT_LOAD headers.
Signed-off-by: Lee, Chun-Yi <jlee@suse.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Baoquan He <bhe@redhat.com>
Cc: Jiang Liu <jiang.liu@linux.intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: Takashi Iwai <tiwai@suse.de>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Viresh Kumar <viresh.kumar@linaro.org>
Cc: Vivek Goyal <vgoyal@redhat.com>
Cc: kexec@lists.infradead.org
Cc: linux-kernel@vger.kernel.org
Cc: <stable@vger.kernel.org>
Link: http://lkml.kernel.org/r/1443531537-29436-1-git-send-email-jlee@suse.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Dave Airlie [Thu, 1 Oct 2015 06:28:25 +0000 (16:28 +1000)]
drm/dp/mst: add some defines for logical/physical ports
This just removes the magic number.
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Dave Airlie [Wed, 30 Sep 2015 00:39:42 +0000 (10:39 +1000)]
drm/dp/mst: drop cancel work sync in the mstb destroy path (v2)
Since
9eb1e57f564d4e6e10991402726cc83fe0b9172f
drm/dp/mst: make sure mst_primary mstb is valid in work function
we validate the mstb structs in the work function, and doing
that takes a reference. So we should never get here with the
work function running using the mstb device, only if the work
function hasn't run yet or is running for another mstb.
So we don't need to sync the work here, this was causing
lockdep spew as below.
[ +0.000160] =============================================
[ +0.000001] [ INFO: possible recursive locking detected ]
[ +0.000002] 3.10.0-320.el7.rhel72.stable.backport.3.x86_64.debug #1 Tainted: G W ------------
[ +0.000001] ---------------------------------------------
[ +0.000001] kworker/4:2/1262 is trying to acquire lock:
[ +0.000001] ((&mgr->work)){+.+.+.}, at: [<
ffffffff810b29a5>] flush_work+0x5/0x2e0
[ +0.000007]
but task is already holding lock:
[ +0.000001] ((&mgr->work)){+.+.+.}, at: [<
ffffffff810b57e4>] process_one_work+0x1b4/0x710
[ +0.000004]
other info that might help us debug this:
[ +0.000001] Possible unsafe locking scenario:
[ +0.000002] CPU0
[ +0.000000] ----
[ +0.000001] lock((&mgr->work));
[ +0.000002] lock((&mgr->work));
[ +0.000001]
*** DEADLOCK ***
[ +0.000001] May be due to missing lock nesting notation
[ +0.000002] 2 locks held by kworker/4:2/1262:
[ +0.000001] #0: (events_long){.+.+.+}, at: [<
ffffffff810b57e4>] process_one_work+0x1b4/0x710
[ +0.000004] #1: ((&mgr->work)){+.+.+.}, at: [<
ffffffff810b57e4>] process_one_work+0x1b4/0x710
[ +0.000003]
stack backtrace:
[ +0.000003] CPU: 4 PID: 1262 Comm: kworker/4:2 Tainted: G W ------------ 3.10.0-320.el7.rhel72.stable.backport.3.x86_64.debug #1
[ +0.000001] Hardware name: LENOVO 20EGS0R600/20EGS0R600, BIOS GNET71WW (2.19 ) 02/05/2015
[ +0.000008] Workqueue: events_long drm_dp_mst_link_probe_work [drm_kms_helper]
[ +0.000001]
ffffffff82c26c90 00000000a527b914 ffff88046399bae8 ffffffff816fe04d
[ +0.000004]
ffff88046399bb58 ffffffff8110f47f ffff880461438000 0001009b840fc003
[ +0.000002]
ffff880461438a98 0000000000000000 0000000804dc26e1 ffffffff824a2c00
[ +0.000003] Call Trace:
[ +0.000004] [<
ffffffff816fe04d>] dump_stack+0x19/0x1b
[ +0.000004] [<
ffffffff8110f47f>] __lock_acquire+0x115f/0x1250
[ +0.000002] [<
ffffffff8110fd49>] lock_acquire+0x99/0x1e0
[ +0.000002] [<
ffffffff810b29a5>] ? flush_work+0x5/0x2e0
[ +0.000002] [<
ffffffff810b29ee>] flush_work+0x4e/0x2e0
[ +0.000002] [<
ffffffff810b29a5>] ? flush_work+0x5/0x2e0
[ +0.000004] [<
ffffffff81025905>] ? native_sched_clock+0x35/0x80
[ +0.000002] [<
ffffffff81025959>] ? sched_clock+0x9/0x10
[ +0.000002] [<
ffffffff810da1f5>] ? local_clock+0x25/0x30
[ +0.000002] [<
ffffffff8110dca9>] ? mark_held_locks+0xb9/0x140
[ +0.000003] [<
ffffffff810b4ed5>] ? __cancel_work_timer+0x95/0x160
[ +0.000002] [<
ffffffff810b4ee8>] __cancel_work_timer+0xa8/0x160
[ +0.000002] [<
ffffffff810b4fb0>] cancel_work_sync+0x10/0x20
[ +0.000007] [<
ffffffffa0160d17>] drm_dp_destroy_mst_branch_device+0x27/0x120 [drm_kms_helper]
[ +0.000006] [<
ffffffffa0163968>] drm_dp_mst_link_probe_work+0x78/0xa0 [drm_kms_helper]
[ +0.000002] [<
ffffffff810b5850>] process_one_work+0x220/0x710
[ +0.000002] [<
ffffffff810b57e4>] ? process_one_work+0x1b4/0x710
[ +0.000005] [<
ffffffff810b5e5b>] worker_thread+0x11b/0x3a0
[ +0.000003] [<
ffffffff810b5d40>] ? process_one_work+0x710/0x710
[ +0.000002] [<
ffffffff810beced>] kthread+0xed/0x100
[ +0.000003] [<
ffffffff810bec00>] ? insert_kthread_work+0x80/0x80
[ +0.000003] [<
ffffffff817121d8>] ret_from_fork+0x58/0x90
v2: add flush_work.
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: stable@vger.kernel.org
Signed-off-by: Dave Airlie <airlied@redhat.com>
Dave Airlie [Wed, 16 Sep 2015 07:55:23 +0000 (17:55 +1000)]
drm/dp/mst: split connector registration into two parts (v2)
In order to cache the EDID properly for tiled displays, we
need to retrieve it before we register the connector with
userspace, otherwise userspace can call get resources
and try and get the edid before we've even cached it.
This fixes some problems when hotplugging mst monitors,
with X/mutter running. As mutter seems to get 0 modes
for one of the monitors in the tile.
v2: fix warning in radeon
handle tile setting in cached path rather than
get edid path.
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: stable@vger.kernel.org
Signed-off-by: Dave Airlie <airlied@redhat.com>
Dave Airlie [Sun, 6 Sep 2015 08:53:00 +0000 (18:53 +1000)]
drm/dp/mst: update the link_address_sent before sending the link address (v3)
Update the state before sending the msg to close it.
v2: reset value if return indicates we haven't send the msg.
v3: just clean the code up.
Pointed out by Adam J Richter on
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=91481
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Dave Airlie [Wed, 16 Sep 2015 00:37:28 +0000 (10:37 +1000)]
drm/dp/mst: fixup handling hotplug on port removal.
output ports should always have a connector, unless
in the rare case connector allocation fails in the
driver.
In this case we only need to teardown the pdt,
and free the struct, and there is no need to
send a hotplug msg.
In the case were we add the port to the destroy
list we need to send a hotplug if we destroy
any connectors, so userspace knows to reprobe
stuff.
this patch also handles port->connector allocation
failing which should be a rare event, but makes
the code consistent.
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: stable@vger.kernel.org
Signed-off-by: Dave Airlie <airlied@redhat.com>
Dave Airlie [Wed, 16 Sep 2015 01:04:49 +0000 (11:04 +1000)]
drm/dp/mst: don't pass port into the path builder function
This is unnecessary and it makes it easier to see what is needed
from port.
also add blank line to make things nicer.
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Alex Deucher [Wed, 30 Sep 2015 18:47:38 +0000 (14:47 -0400)]
drm/radeon: drop radeon_fb_helper_set_par
It was just a wrapper around drm_fb_helper_set_par that
called cursor_set2 in addition. Now that the core handles
this, drop this radeon specific version.
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Michel Dänzer <michel.daenzer@amd.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Alex Deucher [Wed, 30 Sep 2015 18:47:37 +0000 (14:47 -0400)]
drm: handle cursor_set2 in restore_fbdev_mode
If a driver uses the cursor_set2 crtc callback rather than
cursor_set, use that. This fixes the fbdev helper for drivers
that use cursor_set2.
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Michel Dänzer <michel.daenzer@amd.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Linus Torvalds [Fri, 2 Oct 2015 02:20:11 +0000 (22:20 -0400)]
Merge branch 'akpm' (patches from Andrew)
Merge misc fixes from Andrew Morton:
"12 fixes"
* emailed patches from Andrew Morton <akpm@linux-foundation.org>:
dmapool: fix overflow condition in pool_find_page()
thermal: avoid division by zero in power allocator
memcg: remove pcp_counter_lock
kprobes: use _do_fork() in samples to make them work again
drivers/input/joystick/Kconfig: zhenhua.c needs BITREVERSE
memcg: make mem_cgroup_read_stat() unsigned
memcg: fix dirty page migration
dax: fix NULL pointer in __dax_pmd_fault()
mm: hugetlbfs: skip shared VMAs when unmapping private pages to satisfy a fault
mm/slab: fix unexpected index mapping result of kmalloc_size(INDEX_NODE+1)
userfaultfd: remove kernel header include from uapi header
arch/x86/include/asm/efi.h: fix build failure
Linus Torvalds [Fri, 2 Oct 2015 02:06:40 +0000 (22:06 -0400)]
Merge tag 'pm+acpi-4.3-rc4' of git://git./linux/kernel/git/rafael/linux-pm
Pull power management and ACPI fixes from Rafael Wysocki:
"These are fixes mostly, for a few changes made in this cycle (the
intel_idle driver, the OPP library, the ACPI EC driver, turbostat) and
for some issues that have just been discovered (ACPI PCI IRQ
management, PCI power management documentation, turbostat), with a
couple of cleanups on top of them.
Specifics:
- intel_idle driver fixup for the recently added Skylake chips
support (Len Brown).
- Operating Performance Points (OPP) library fix related to the
recently added support for new DT bindings and a fix for a typo in
a comment (Viresh Kumar, Stephen Boyd).
- ACPI EC driver fix for a recently introduced memory leak in an
error code path (Lv Zheng).
- ACPI PCI IRQ management fix for the issue where an ISA IRQ is
shared with a PCI device which requires it to be configured in a
different way and may cause an interrupt storm to happen as a
result with an extra ACPI SCI IRQ handling simplification on top of
it (Jiang Liu).
- Update of the PCI power management documentation that became
outdated and started to actively confuse the readers to make it
actually reflect the code (Rafael J Wysocki).
- turbostat fixes including an IVB Xeon regression fix (related to
the --debug command line option), Skylake adjustment for the TSC
running at a frequency that doesn't match the base one exactly, and
a Knights Landing quirk to account for the fact that it only
updates APERF and MPERF every 1024 clock cycles plus bumping up the
turbostat version number (Len Brown, Hubert Chrzaniuk)"
* tag 'pm+acpi-4.3-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
tools/power turbosat: update version number
tools/power turbostat: SKL: Adjust for TSC difference from base frequency
tools/power turbostat: KNL workaround for %Busy and Avg_MHz
tools/power turbostat: IVB Xeon: fix --debug regression
ACPI / PCI: Remove duplicated penalty on SCI IRQ
ACPI, PCI, irq: Do not share PCI IRQ with ISA IRQ
ACPI / EC: Fix a memory leak issue in acpi_ec_query()
PM / OPP: Fix typo modifcation -> modification
PCI / PM: Update runtime PM documentation for PCI devices
PM / OPP: of_property_count_u32_elems() can return errors
intel_idle: Skylake Client Support - updated
Linus Torvalds [Fri, 2 Oct 2015 01:55:35 +0000 (21:55 -0400)]
Merge git://git./linux/kernel/git/davem/net
Pull networking fixes from David Miller:
1) Fix regression in SKB partial checksum handling, from Pravin B
Shalar.
2) Fix VLAN inside of VXLAN handling in i40e driver, from Jesse
Brandeburg.
3) Cure softlockups during accept() in SCTP, from Karl Heiss.
4) MSG_PEEK should return multiple SKBs worth of data in AF_UNIX, from
Aaron Conole.
5) IPV6 erroneously ignores output interface specifier in lookup key for
route lookups, fix from David Ahern.
6) In Marvell DSA driver, forward unknown frames to CPU port, from
Andrew Lunn.
7) Mission flow flag initializations in some code paths, from David
Ahern.
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net:
net: Initialize flow flags in input path
net: dsa: fix preparation of a port STP update
testptp: Silence compiler warnings on ppc64
net/mlx4: Handle return codes in mlx4_qp_attach_common
dsa: mv88e6xxx: Enable forwarding for unknown to the CPU port
skbuff: Fix skb checksum partial check.
net: ipv6: Add RT6_LOOKUP_F_IFACE flag if oif is set
net sysfs: Print link speed as signed integer
bna: fix error handling
af_unix: return data from multiple SKBs on recv() with MSG_PEEK flag
af_unix: Convert the unix_sk macro to an inline function for type safety
net: sctp: Don't use 64 kilobyte lookup table for four elements
l2tp: protect tunnel->del_work by ref_count
net/ibm/emac: bump version numbers for correct work with ethtool
sctp: Prevent soft lockup when sctp_accept() is called during a timeout event
sctp: Whitespace fix
i40e/i40evf: check for stopped admin queue
i40e: fix VLAN inside VXLAN
r8169: fix handling rtl_readphy result
net: hisilicon: fix handling platform_get_irq result
Robin Murphy [Thu, 1 Oct 2015 22:37:19 +0000 (15:37 -0700)]
dmapool: fix overflow condition in pool_find_page()
If a DMA pool lies at the very top of the dma_addr_t range (as may
happen with an IOMMU involved), the calculated end address of the pool
wraps around to zero, and page lookup always fails.
Tweak the relevant calculation to be overflow-proof.
Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Marek Szyprowski <m.szyprowski@samsung.com>
Cc: Sumit Semwal <sumit.semwal@linaro.org>
Cc: Sakari Ailus <sakari.ailus@iki.fi>
Cc: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Andrea Arcangeli [Thu, 1 Oct 2015 22:37:16 +0000 (15:37 -0700)]
thermal: avoid division by zero in power allocator
During boot I get a div by zero Oops regression starting in v4.3-rc3.
Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
Reviewed-by: Javi Merino <javi.merino@arm.com>
Cc: Zhang Rui <rui.zhang@intel.com>
Cc: Eduardo Valentin <edubezval@gmail.com>
Cc: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Greg Thelen [Thu, 1 Oct 2015 22:37:13 +0000 (15:37 -0700)]
memcg: remove pcp_counter_lock
Commit
733a572e66d2 ("memcg: make mem_cgroup_read_{stat|event}() iterate
possible cpus instead of online") removed the last use of the per memcg
pcp_counter_lock but forgot to remove the variable.
Kill the vestigial variable.
Signed-off-by: Greg Thelen <gthelen@google.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Petr Mladek [Thu, 1 Oct 2015 22:37:11 +0000 (15:37 -0700)]
kprobes: use _do_fork() in samples to make them work again
Commit
3033f14ab78c ("clone: support passing tls argument via C rather
than pt_regs magic") introduced _do_fork() that allowed to pass @tls
parameter.
The old do_fork() is defined only for architectures that are not ready
to use this way and do not define HAVE_COPY_THREAD_TLS.
Let's use _do_fork() in the kprobe examples to make them work again on
all architectures.
Signed-off-by: Petr Mladek <pmladek@suse.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Thiago Macieira <thiago.macieira@intel.com>
Cc: Jiri Kosina <jkosina@suse.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Andrew Morton [Thu, 1 Oct 2015 22:37:08 +0000 (15:37 -0700)]
drivers/input/joystick/Kconfig: zhenhua.c needs BITREVERSE
It uses bitrev8(), so it must ensure that lib/bitrev.o gets included in
vmlinux.
Cc: Fengguang Wu <fengguang.wu@gmail.com>
Cc: yalin wang <yalin.wang2010@gmail.com>
Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Greg Thelen [Thu, 1 Oct 2015 22:37:05 +0000 (15:37 -0700)]
memcg: make mem_cgroup_read_stat() unsigned
mem_cgroup_read_stat() returns a page count by summing per cpu page
counters. The summing is racy wrt. updates, so a transient negative
sum is possible. Callers don't want negative values:
- mem_cgroup_wb_stats() doesn't want negative nr_dirty or nr_writeback.
This could confuse dirty throttling.
- oom reports and memory.stat shouldn't show confusing negative usage.
- tree_usage() already avoids negatives.
Avoid returning negative page counts from mem_cgroup_read_stat() and
convert it to unsigned.
[akpm@linux-foundation.org: fix old typo while we're in there]
Signed-off-by: Greg Thelen <gthelen@google.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: <stable@vger.kernel.org> [4.2+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Greg Thelen [Thu, 1 Oct 2015 22:37:02 +0000 (15:37 -0700)]
memcg: fix dirty page migration
The problem starts with a file backed dirty page which is charged to a
memcg. Then page migration is used to move oldpage to newpage.
Migration:
- copies the oldpage's data to newpage
- clears oldpage.PG_dirty
- sets newpage.PG_dirty
- uncharges oldpage from memcg
- charges newpage to memcg
Clearing oldpage.PG_dirty decrements the charged memcg's dirty page
count.
However, because newpage is not yet charged, setting newpage.PG_dirty
does not increment the memcg's dirty page count. After migration
completes newpage.PG_dirty is eventually cleared, often in
account_page_cleaned(). At this time newpage is charged to a memcg so
the memcg's dirty page count is decremented which causes underflow
because the count was not previously incremented by migration. This
underflow causes balance_dirty_pages() to see a very large unsigned
number of dirty memcg pages which leads to aggressive throttling of
buffered writes by processes in non root memcg.
This issue:
- can harm performance of non root memcg buffered writes.
- can report too small (even negative) values in
memory.stat[(total_)dirty] counters of all memcg, including the root.
To avoid polluting migrate.c with #ifdef CONFIG_MEMCG checks, introduce
page_memcg() and set_page_memcg() helpers.
Test:
0) setup and enter limited memcg
mkdir /sys/fs/cgroup/test
echo 1G > /sys/fs/cgroup/test/memory.limit_in_bytes
echo $$ > /sys/fs/cgroup/test/cgroup.procs
1) buffered writes baseline
dd if=/dev/zero of=/data/tmp/foo bs=1M count=1k
sync
grep ^dirty /sys/fs/cgroup/test/memory.stat
2) buffered writes with compaction antagonist to induce migration
yes 1 > /proc/sys/vm/compact_memory &
rm -rf /data/tmp/foo
dd if=/dev/zero of=/data/tmp/foo bs=1M count=1k
kill %
sync
grep ^dirty /sys/fs/cgroup/test/memory.stat
3) buffered writes without antagonist, should match baseline
rm -rf /data/tmp/foo
dd if=/dev/zero of=/data/tmp/foo bs=1M count=1k
sync
grep ^dirty /sys/fs/cgroup/test/memory.stat
(speed, dirty residue)
unpatched patched
1) 841 MB/s 0 dirty pages 886 MB/s 0 dirty pages
2) 611 MB/s -
33427456 dirty pages 793 MB/s 0 dirty pages
3) 114 MB/s -
33427456 dirty pages 891 MB/s 0 dirty pages
Notice that unpatched baseline performance (1) fell after
migration (3): 841 -> 114 MB/s. In the patched kernel, post
migration performance matches baseline.
Fixes: c4843a7593a9 ("memcg: add per cgroup dirty page accounting")
Signed-off-by: Greg Thelen <gthelen@google.com>
Reported-by: Dave Hansen <dave.hansen@intel.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Cc: <stable@vger.kernel.org> [4.2+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Ross Zwisler [Thu, 1 Oct 2015 22:36:59 +0000 (15:36 -0700)]
dax: fix NULL pointer in __dax_pmd_fault()
Commit
46c043ede471 ("mm: take i_mmap_lock in unmap_mapping_range() for
DAX") moved some code in __dax_pmd_fault() that was responsible for
zeroing newly allocated PMD pages. The new location didn't properly set
up 'kaddr', so when run this code resulted in a NULL pointer BUG.
Fix this by getting the correct 'kaddr' via bdev_direct_access().
Signed-off-by: Ross Zwisler <ross.zwisler@linux.intel.com>
Reported-by: Dan Williams <dan.j.williams@intel.com>
Reviewed-by: Dan Williams <dan.j.williams@intel.com>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Matthew Wilcox <willy@linux.intel.com>
Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Cc: Dave Chinner <david@fromorbit.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
projects / openwrt / staging / blogic.git / log