openwrt/staging/blogic.git
5 years agodrm/nouveau/fault/gp100: expose MaxwellFaultBufferA
Ben Skeggs [Tue, 8 May 2018 10:39:48 +0000 (20:39 +1000)]
drm/nouveau/fault/gp100: expose MaxwellFaultBufferA

This nvclass exposes the replayable fault buffer, which will be used
by SVM to manage GPU page faults.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
5 years agodrm/nouveau/mmu/gp100-: support vmms with gcc/tex replayable faults enabled
Ben Skeggs [Tue, 8 May 2018 10:39:48 +0000 (20:39 +1000)]
drm/nouveau/mmu/gp100-: support vmms with gcc/tex replayable faults enabled

Some GPU units are capable of supporting "replayable" page faults, where
the execution unit will wait for SW to fixup GPU page tables rather than
triggering a channel-fatal fault.

This feature isn't useful (it's harmful, even) unless something like HMM
is being used to manage events appearing in the replayable fault buffer,
so, it's disabled by default.

This commit allows a client to request it be enabled.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
5 years agodrm/nouveau/mmu/gp100-: add privileged methods for fault replay/cancel
Ben Skeggs [Mon, 9 Jul 2018 06:07:40 +0000 (16:07 +1000)]
drm/nouveau/mmu/gp100-: add privileged methods for fault replay/cancel

Host methods exist to do at least some of what we need, but we are not
currently pushing replay/cancels through a channel like UVM does as it's
not clear whether it's necessary in our case (UVM also updates PTEs with
the GPU).

UVM also pushes a software method for fault cancels on Pascal, seemingly
because the host methods don't appear to be sufficient.  If/when we want
to push the replay/cancel on the GPU, we can re-purpose the cancellation
code here to implement that swmthd.

Keep it simple for now, until we figure out exactly what we need here.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
5 years agodrm/nouveau/mmu: add a privileged method to directly manage PTEs
Ben Skeggs [Sat, 7 Jul 2018 02:35:48 +0000 (12:35 +1000)]
drm/nouveau/mmu: add a privileged method to directly manage PTEs

This provides a somewhat more direct method of manipulating the GPU page
tables, which will be required to support SVM.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
5 years agodrm/nouveau/mmu: store mapped flag separately from memory pointer
Ben Skeggs [Sat, 7 Jul 2018 08:29:20 +0000 (18:29 +1000)]
drm/nouveau/mmu: store mapped flag separately from memory pointer

This will be used to support a privileged client providing PTEs directly,
without a memory object to use as a reference.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
5 years agodrm/nouveau/mmu: support initialisation of client-managed address-spaces
Ben Skeggs [Wed, 13 Jun 2018 06:25:53 +0000 (16:25 +1000)]
drm/nouveau/mmu: support initialisation of client-managed address-spaces

NVKM is currently responsible for managing the allocation of a client's
GPU address-space, but there's various use-cases (ie. HMM address-space
mirroring) where giving a client more direct control is desirable.

This commit allows for a VMM to be created where the area allocated for
NVKM is limited to a client-specified window, the remainder of address-
space is controlled directly by the client.

Leaving a window is necessary to support various internal requirements,
but also to support existing allocation interfaces as not all of the HW
is capable of working with a HMM allocation.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
5 years agodrm/nouveau/gr/gf100-: expose method to determine current context
Ben Skeggs [Tue, 5 Feb 2019 04:54:53 +0000 (14:54 +1000)]
drm/nouveau/gr/gf100-: expose method to determine current context

MMU will need access to this info.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
5 years agodrm/nouveau/gr/gf100-: expose fecs methods for pausing ctxsw
Ben Skeggs [Fri, 1 Feb 2019 03:52:50 +0000 (13:52 +1000)]
drm/nouveau/gr/gf100-: expose fecs methods for pausing ctxsw

MMU will need access to these.

v2. Apply fix from Rhys Kidd to send correct FECS method for STOP_CTXSW.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
5 years agodrm/nouveau/falcon: fix a few indentation issues
Colin Ian King [Tue, 12 Feb 2019 13:51:18 +0000 (13:51 +0000)]
drm/nouveau/falcon: fix a few indentation issues

There are a few statements that are indented incorrectly. Fix these.

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
5 years agodrm/nouveau/mmu/gf100-: virtualise setting pdb base address for invalidation
Ben Skeggs [Tue, 12 Feb 2019 12:28:13 +0000 (22:28 +1000)]
drm/nouveau/mmu/gf100-: virtualise setting pdb base address for invalidation

It appears that Pascal and newer need something different.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
5 years agodrm/nouveau/mmu/gf100-: make mmu invalidate function more general
Ben Skeggs [Tue, 12 Feb 2019 12:28:13 +0000 (22:28 +1000)]
drm/nouveau/mmu/gf100-: make mmu invalidate function more general

Will want to reuse this for fault replay/cancellation swmthds.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
5 years agodrm/nouveau/gr/gf100-: store fecs/gpccs falcon pointers in substructures
Ben Skeggs [Tue, 12 Feb 2019 12:28:13 +0000 (22:28 +1000)]
drm/nouveau/gr/gf100-: store fecs/gpccs falcon pointers in substructures

Future changes will want to add some additional things here, keep them
grouped together.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
5 years agodrm/nouveau/gr/gf100-: move fecs bind_pointer into a function
Ben Skeggs [Tue, 12 Feb 2019 12:28:13 +0000 (22:28 +1000)]
drm/nouveau/gr/gf100-: move fecs bind_pointer into a function

Makes the code somewhat less magic.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
5 years agodrm/nouveau/gr/gf100-: remove some unnecessary reg writes
Ben Skeggs [Tue, 12 Feb 2019 12:28:13 +0000 (22:28 +1000)]
drm/nouveau/gr/gf100-: remove some unnecessary reg writes

This is already done during golden context creation.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
5 years agodrm/nouveau/gr/gf100-: move fecs elpg setup into functions
Ben Skeggs [Tue, 12 Feb 2019 12:28:13 +0000 (22:28 +1000)]
drm/nouveau/gr/gf100-: move fecs elpg setup into functions

Makes the code somewhat less magic.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
5 years agodrm/nouveau/gr/gf100-: move fecs discover_pm_image_size into a function
Ben Skeggs [Tue, 12 Feb 2019 12:28:13 +0000 (22:28 +1000)]
drm/nouveau/gr/gf100-: move fecs discover_pm_image_size into a function

Makes the code somewhat less magic.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
5 years agodrm/nouveau/gr/gf100-: move fecs discover_zcull_image_size into a function
Ben Skeggs [Tue, 12 Feb 2019 12:28:13 +0000 (22:28 +1000)]
drm/nouveau/gr/gf100-: move fecs discover_zcull_image_size into a function

Makes the code somewhat less magic.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
5 years agodrm/nouveau/gr/gf100-: move fecs discover_image_size into a function
Ben Skeggs [Tue, 12 Feb 2019 12:28:13 +0000 (22:28 +1000)]
drm/nouveau/gr/gf100-: move fecs discover_image_size into a function

Makes the code somewhat less magic.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
5 years agodrm/nouveau/gr/gf100-: move fecs set_watchdog_timeout method into a function
Ben Skeggs [Tue, 12 Feb 2019 12:28:13 +0000 (22:28 +1000)]
drm/nouveau/gr/gf100-: move fecs set_watchdog_timeout method into a function

Makes the code somewhat less magic.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
5 years agodrm/nouveau: allow accelerated buffer moves even when gr isn't present
Ben Skeggs [Tue, 12 Feb 2019 12:28:13 +0000 (22:28 +1000)]
drm/nouveau: allow accelerated buffer moves even when gr isn't present

There's no need to avoid using copy engines if gr init fails for some
reason (usually missing FW, or incomplete bring-up).

It's not terribly useful for an end-user, but it'll slightly speed up
suspend/resume when saving fb contents, and allow for host/ce code to
be validated.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
5 years agodrm/nouveau/kms/nv04-nv4x: move resume code to dispnv04 init hook
Ben Skeggs [Tue, 12 Feb 2019 12:28:13 +0000 (22:28 +1000)]
drm/nouveau/kms/nv04-nv4x: move resume code to dispnv04 init hook

It has no relevance to the atomic path used by newer GPUs.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
5 years agodrm/nouveau/kms/nv04-nv4x: move suspend code to dispnv04 fini hook
Ben Skeggs [Tue, 12 Feb 2019 12:28:13 +0000 (22:28 +1000)]
drm/nouveau/kms/nv04-nv4x: move suspend code to dispnv04 fini hook

It has no relevance to the atomic path used by newer GPUs.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
5 years agodrm/nouveau/kms/nv04-nv4x: move a bunch of pre-nv50 page flip code to dispnv04
Ben Skeggs [Tue, 12 Feb 2019 12:28:13 +0000 (22:28 +1000)]
drm/nouveau/kms/nv04-nv4x: move a bunch of pre-nv50 page flip code to dispnv04

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
5 years agodrm/nouveau/kms: display destroy/init/fini hooks can be static
Ben Skeggs [Tue, 12 Feb 2019 12:28:13 +0000 (22:28 +1000)]
drm/nouveau/kms: display destroy/init/fini hooks can be static

Swapped order of functions in dispnv04 to allow this, but no code changes.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
5 years agodrm/nouveau: allocate kernel channel(s) before initialising display
Ben Skeggs [Tue, 12 Feb 2019 12:28:13 +0000 (22:28 +1000)]
drm/nouveau: allocate kernel channel(s) before initialising display

Some of the pre-NV50 depends on SW methods to implement synchronisation
for page flips, and we want to move this setup out of common code, thus
we require the channel to have been allocation before display init.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
5 years agodrm/nouveau/disp/gf119-: decode exception reason to human-readable string
Ben Skeggs [Tue, 12 Feb 2019 12:28:13 +0000 (22:28 +1000)]
drm/nouveau/disp/gf119-: decode exception reason to human-readable string

We also change the error strings to match NVIDIA's naming.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
5 years agodrm/nouveau/bios/init: handle INIT_GENERIC_CONDITION_ID_NO_PANEL_SEQ_DELAYS
Ben Skeggs [Tue, 12 Feb 2019 12:28:13 +0000 (22:28 +1000)]
drm/nouveau/bios/init: handle INIT_GENERIC_CONDITION_ID_NO_PANEL_SEQ_DELAYS

As I currently understand it, this is related to features we have no
support for as of yet.

In theory, this change should be a noop, just without the warning.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
5 years agodrm/nouveau/bios/init: label existing INIT_GENERIC_CONDITION types
Ben Skeggs [Tue, 12 Feb 2019 12:28:13 +0000 (22:28 +1000)]
drm/nouveau/bios/init: label existing INIT_GENERIC_CONDITION types

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
5 years agodrm/nouveau/secboot: fix missing newline in error messages
Ben Skeggs [Tue, 12 Feb 2019 12:28:13 +0000 (22:28 +1000)]
drm/nouveau/secboot: fix missing newline in error messages

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
5 years agodrm/nouveau/sec2/tu102-: instantiate SEC2 falcon
Ben Skeggs [Tue, 12 Feb 2019 12:28:13 +0000 (22:28 +1000)]
drm/nouveau/sec2/tu102-: instantiate SEC2 falcon

Required for ACR.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
5 years agodrm/nouveau/sec2: utilise engine PRI address from TOP
Ben Skeggs [Tue, 12 Feb 2019 12:28:13 +0000 (22:28 +1000)]
drm/nouveau/sec2: utilise engine PRI address from TOP

Turing has its SEC2 instance in an alternate location, and this avoids
needing to duplicate the code here for it.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
5 years agodrm/nouveau/nvdec/tu102-: instantiate NVDEC0 falcon
Ben Skeggs [Tue, 12 Feb 2019 12:28:13 +0000 (22:28 +1000)]
drm/nouveau/nvdec/tu102-: instantiate NVDEC0 falcon

Required to run VPR scrubber binary as part of secboot.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
5 years agodrm/nouveau/nvdec/gp102-: utilise engine PRI address from TOP
Ben Skeggs [Tue, 12 Feb 2019 12:28:13 +0000 (22:28 +1000)]
drm/nouveau/nvdec/gp102-: utilise engine PRI address from TOP

Turing has its NVDEC instances in an alternate location.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
5 years agodrm/nouveau/gsp/gv100-: instantiate GSP falcon
Ben Skeggs [Tue, 12 Feb 2019 12:28:13 +0000 (22:28 +1000)]
drm/nouveau/gsp/gv100-: instantiate GSP falcon

We need this for Turing ACR, but it's present from Volta onwards.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
5 years agodrm/nouveau/top/gv100-: translate entry for the GSP
Ben Skeggs [Tue, 12 Feb 2019 12:28:13 +0000 (22:28 +1000)]
drm/nouveau/top/gv100-: translate entry for the GSP

So we're able to connect fault/interrupt handling to the GSP subdev.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
5 years agodrm/nouveau/top: add function to lookup PRI address for devices
Ben Skeggs [Tue, 12 Feb 2019 12:28:13 +0000 (22:28 +1000)]
drm/nouveau/top: add function to lookup PRI address for devices

Will be using this in upcoming changes to avoid the need for entirely
new subdevs to deal with Turing register moves.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
5 years agodrm/nouveau/core: define GSP subdev
Ben Skeggs [Tue, 12 Feb 2019 12:28:13 +0000 (22:28 +1000)]
drm/nouveau/core: define GSP subdev

Exact meaning of the acronym is unknown, but we need this for Turing ACR.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
5 years agodrm/nouveau: fix missing break in switch statement
Colin Ian King [Mon, 8 Oct 2018 20:47:36 +0000 (21:47 +0100)]
drm/nouveau: fix missing break in switch statement

The NOUVEAU_GETPARAM_PCI_DEVICE case is missing a break statement and falls
through to the following NOUVEAU_GETPARAM_BUS_TYPE case and may end up
re-assigning the getparam->value to an undesired value. Fix this by adding
in the missing break.

Detected by CoverityScan, CID#1460507 ("Missing break in switch")

Fixes: 359088d5b8ec ("drm/nouveau: remove trivial cases of nvxx_device() usage")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Reviewed-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
5 years agodrm/nouveau: mark expected switch fall-through
Gustavo A. R. Silva [Tue, 29 Jan 2019 20:30:46 +0000 (14:30 -0600)]
drm/nouveau: mark expected switch fall-through

In preparation to enabling -Wimplicit-fallthrough, mark switch cases
where we are expecting to fall through.

This patch fixes the following warning:

drivers/gpu/drm/nouveau/nouveau_bo.c:1434:53: warning: this statement may fall through [-Wimplicit-fallthrough=]

Warning level 3 was used: -Wimplicit-fallthrough=3

This patch is part of the ongoing efforts to enabling
-Wimplicit-fallthrough.

Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
5 years agodrm/nouveau: Don't WARN_ON VCPI allocation failures
Lyude Paul [Mon, 28 Jan 2019 21:03:50 +0000 (16:03 -0500)]
drm/nouveau: Don't WARN_ON VCPI allocation failures

This is much louder then we want. VCPI allocation failures are quite
normal, since they will happen if any part of the modesetting process is
interrupted by removing the DP MST topology in question. So just print a
debugging message on VCPI failures instead.

Signed-off-by: Lyude Paul <lyude@redhat.com>
Fixes: f479c0ba4a17 ("drm/nouveau/kms/nv50: initial support for DP 1.2 multi-stream")
Cc: Ben Skeggs <bskeggs@redhat.com>
Cc: dri-devel@lists.freedesktop.org
Cc: nouveau@lists.freedesktop.org
Cc: <stable@vger.kernel.org> # v4.10+
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
5 years agodrm/nouveau/pmu: don't print reply values if exec is false
Colin Ian King [Wed, 19 Dec 2018 15:29:49 +0000 (15:29 +0000)]
drm/nouveau/pmu: don't print reply values if exec is false

Currently the uninitialized values in the array reply are printed out
when exec is false and nvkm_pmu_send has not updated the array. Avoid
confusion by only dumping out these values if they have been actually
updated.

Detected by CoverityScan, CID#1271291 ("Uninitialized scaler variable")
Fixes: ebb58dc2ef8c ("drm/nouveau/pmu: rename from pwr (no binary change)")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
5 years agodrm/nouveau/bios/ramcfg: fix missing parentheses when calculating RON
Colin Ian King [Sun, 25 Nov 2018 17:09:18 +0000 (17:09 +0000)]
drm/nouveau/bios/ramcfg: fix missing parentheses when calculating RON

Currently, the expression for calculating RON is always going to result
in zero no matter the value of ram->mr[1] because the ! operator has
higher precedence than the shift >> operator.  I believe the missing
parentheses around the expression before appying the ! operator will
result in the desired result.

[ Note, not tested ]

Detected by CoveritScan, CID#1324005 ("Operands don't affect result")

Fixes: c25bf7b6155c ("drm/nouveau/bios/ramcfg: Separate out RON pull value")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
5 years agodrm/nouveau/bios/dp: make array vsoff static, shrinks object size
Colin Ian King [Tue, 4 Sep 2018 15:23:33 +0000 (16:23 +0100)]
drm/nouveau/bios/dp: make array vsoff static, shrinks object size

Don't populate the array vsoff on the stack but instead make it
static. Makes the object code smaller by 67 bytes:

Before:
   text    data     bss     dec     hex filename
   5753     112       0    5865    16e9 .../nouveau/nvkm/subdev/bios/dp.o

After:
   text    data     bss     dec     hex filename
   5622     176       0    5798    16a6 .../nouveau/nvkm/subdev/bios/dp.o

(gcc version 8.2.0 x86_64)

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
5 years agodrm/nouveau/ce/tu102: rename implementation from tu104
Ben Skeggs [Thu, 17 Jan 2019 02:13:00 +0000 (12:13 +1000)]
drm/nouveau/ce/tu102: rename implementation from tu104

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
5 years agodrm/nouveau/fifo/tu102: rename implementation from tu104
Ben Skeggs [Thu, 17 Jan 2019 02:11:47 +0000 (12:11 +1000)]
drm/nouveau/fifo/tu102: rename implementation from tu104

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
5 years agodrm/nouveau/disp/tu102: rename implementation from tu104
Ben Skeggs [Thu, 17 Jan 2019 02:10:06 +0000 (12:10 +1000)]
drm/nouveau/disp/tu102: rename implementation from tu104

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
5 years agodrm/nouveau/fault/tu102: rename implementation from tu104
Ben Skeggs [Thu, 17 Jan 2019 02:07:23 +0000 (12:07 +1000)]
drm/nouveau/fault/tu102: rename implementation from tu104

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
5 years agodrm/nouveau/bar/tu102: rename implementation from tu104
Ben Skeggs [Thu, 17 Jan 2019 02:06:01 +0000 (12:06 +1000)]
drm/nouveau/bar/tu102: rename implementation from tu104

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
5 years agodrm/nouveau/mmu/tu102: rename implementation from tu104
Ben Skeggs [Thu, 17 Jan 2019 02:04:02 +0000 (12:04 +1000)]
drm/nouveau/mmu/tu102: rename implementation from tu104

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
5 years agodrm/nouveau/mc/tu102: rename implementation from tu104
Ben Skeggs [Thu, 17 Jan 2019 01:46:39 +0000 (11:46 +1000)]
drm/nouveau/mc/tu102: rename implementation from tu104

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
5 years agodrm/nouveau/devinit/tu102: rename implementation from tu104
Ben Skeggs [Thu, 17 Jan 2019 01:41:53 +0000 (11:41 +1000)]
drm/nouveau/devinit/tu102: rename implementation from tu104

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
5 years agodrm/nouveau/volt/gf117: fix speedo readout register
Ilia Mirkin [Sun, 13 Jan 2019 22:50:10 +0000 (17:50 -0500)]
drm/nouveau/volt/gf117: fix speedo readout register

GF117 appears to use the same register as GK104 (but still with the
general Fermi readout mechanism).

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=108980
Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
5 years agoMerge v5.0-rc7 into drm-next
Dave Airlie [Mon, 18 Feb 2019 03:27:15 +0000 (13:27 +1000)]
Merge v5.0-rc7 into drm-next

Backmerging for nouveau and imx that needed some fixes for next pulls.

Signed-off-by: Dave Airlie <airlied@redhat.com>
5 years agoLinux 5.0-rc7
Linus Torvalds [Mon, 18 Feb 2019 02:46:40 +0000 (18:46 -0800)]
Linux 5.0-rc7

5 years agoMerge branch 'efi-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sun, 17 Feb 2019 17:22:01 +0000 (09:22 -0800)]
Merge branch 'efi-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull EFI fixes from Ingo Molnar:
 "This tree reverts a GICv3 commit (which was broken) and fixes it in
  another way, by adding a memblock build-time entries quirk for ARM64"

* 'efi-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  efi/arm: Revert "Defer persistent reservations until after paging_init()"
  arm64, mm, efi: Account for GICv3 LPI tables in static memblock reserve table

5 years agoMerge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sun, 17 Feb 2019 16:44:38 +0000 (08:44 -0800)]
Merge branch 'x86-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull x86 fixes from Ingo Molnar:
 "Three changes:

   - An UV fix/quirk to pull UV BIOS calls into the efi_runtime_lock
     locking regime. (This done by aliasing __efi_uv_runtime_lock to
     efi_runtime_lock, which should make the quirk nature obvious and
     maintain the general policy that the EFI lock (name...) isn't
     exposed to drivers.)

   - Our version of MAGA: Make a.out Great Again.

   - Add a new Intel model name enumerator to an upstream header to help
     reduce dependencies going forward"

* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/platform/UV: Use efi_runtime_lock to serialise BIOS calls
  x86/CPU: Add Icelake model number
  x86/a.out: Clear the dump structure initially

5 years agoMerge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sun, 17 Feb 2019 16:38:13 +0000 (08:38 -0800)]
Merge branch 'perf-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull perf fixes from Ingo Molnar:
 "Two fixes on the kernel side: fix an over-eager condition that failed
  larger perf ring-buffer sizes, plus fix crashes in the Intel BTS code
  for a corner case, found by fuzzing"

* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  perf/core: Fix impossible ring-buffer sizes warning
  perf/x86: Add check_period PMU callback

5 years agoMerge tag 'powerpc-5.0-5' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc...
Linus Torvalds [Sun, 17 Feb 2019 16:36:21 +0000 (08:36 -0800)]
Merge tag 'powerpc-5.0-5' of git://git./linux/kernel/git/powerpc/linux

Pull powerpc fix from Michael Ellerman:
 "Just one fix, for pgd/pud_present() which were broken on big endian
  since v4.20, leading to possible data corruption.

  Thanks to: Aneesh Kumar K.V., Erhard F., Jan Kara"

* tag 'powerpc-5.0-5' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
  powerpc/64s: Fix possible corruption on big endian due to pgd/pud_present()

5 years agoMerge tag 'csky-for-linus-5.0-rc6' of git://github.com/c-sky/csky-linux
Linus Torvalds [Sun, 17 Feb 2019 16:34:10 +0000 (08:34 -0800)]
Merge tag 'csky-for-linus-5.0-rc6' of git://github.com/c-sky/csky-linux

Pull arch/csky fixes from Guo Ren:
 "Here are some fixup patches for 5.0-rc6"

* tag 'csky-for-linus-5.0-rc6' of git://github.com/c-sky/csky-linux:
  csky: Fixup dead loop in show_stack
  csky: Fixup io-range page attribute for mmap("/dev/mem")
  csky: coding convention: Use task_stack_page
  csky: Fixup wrong pt_regs size
  csky: Fixup _PAGE_GLOBAL bit for 610 tlb entry

5 years agoMerge branch 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa...
Linus Torvalds [Sun, 17 Feb 2019 16:32:25 +0000 (08:32 -0800)]
Merge branch 'i2c/for-current' of git://git./linux/kernel/git/wsa/linux

Pull i2c fixes from Wolfram Sang:
 "Two more driver bugfixes"

* 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
  i2c: bcm2835: Clear current buffer pointers and counts after a transfer
  i2c: cadence: Fix the hold bit setting

5 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
Linus Torvalds [Sun, 17 Feb 2019 16:30:35 +0000 (08:30 -0800)]
Merge branch 'for-linus' of git://git./linux/kernel/git/dtor/input

Pull input fixes from Dmitry Torokhov:

 - tweaks to Elan drivers (both PS/2 and I2C) to support new devices.
   Also revert of one of IDs as that device should really be driven by
   i2c-hid + hid-multitouch

 - a few drivers have been switched to set_brightness_blocking() call
   because they either were sleeping the their set_brightness()
   implementation or used workqueue but were not canceling it on unbind.

 - ps2-gpio and matrix_keypad needed to [properly] flush their works to
   avoid potential use-after-free on unbind.

 - other miscellaneous fixes.

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input:
  Input: elan_i2c - add ACPI ID for touchpad in Lenovo V330-15ISK
  Input: st-keyscan - fix potential zalloc NULL dereference
  Input: apanel - switch to using brightness_set_blocking()
  Revert "Input: elan_i2c - add ACPI ID for touchpad in ASUS Aspire F5-573G"
  Input: qt2160 - switch to using brightness_set_blocking()
  Input: matrix_keypad - use flush_delayed_work()
  Input: ps2-gpio - flush TX work when closing port
  Input: cap11xx - switch to using set_brightness_blocking()
  Input: elantech - enable 3rd button support on Fujitsu CELSIUS H780
  Input: bma150 - register input device after setting private data
  Input: pwm-vibra - stop regulator after disabling pwm, not before
  Input: pwm-vibra - prevent unbalanced regulator
  Input: snvs_pwrkey - allow selecting driver for i.MX 7D

5 years agoMerge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm
Linus Torvalds [Sun, 17 Feb 2019 16:28:49 +0000 (08:28 -0800)]
Merge tag 'for-linus' of git://git./virt/kvm/kvm

Pull KVM fixes from Paolo Bonzini:
 "A somewhat bigger ARM update, and the usual smattering of x86 bug
  fixes"

* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
  kvm: vmx: Fix entry number check for add_atomic_switch_msr()
  KVM: x86: Recompute PID.ON when clearing PID.SN
  KVM: nVMX: Restore a preemption timer consistency check
  x86/kvm/nVMX: read from MSR_IA32_VMX_PROCBASED_CTLS2 only when it is available
  KVM: arm64: Forbid kprobing of the VHE world-switch code
  KVM: arm64: Relax the restriction on using stage2 PUD huge mapping
  arm: KVM: Add missing kvm_stage2_has_pmd() helper
  KVM: arm/arm64: vgic: Always initialize the group of private IRQs
  arm/arm64: KVM: Don't panic on failure to properly reset system registers
  arm/arm64: KVM: Allow a VCPU to fully reset itself
  KVM: arm/arm64: Reset the VCPU without preemption and vcpu state loaded
  arm64: KVM: Don't generate UNDEF when LORegion feature is present
  KVM: arm/arm64: vgic: Make vgic_cpu->ap_list_lock a raw_spinlock
  KVM: arm/arm64: vgic: Make vgic_dist->lpi_list_lock a raw_spinlock
  KVM: arm/arm64: vgic: Make vgic_irq->irq_lock a raw_spinlock

5 years agoInput: elan_i2c - add ACPI ID for touchpad in Lenovo V330-15ISK
Mauro Ciancio [Mon, 14 Jan 2019 13:24:53 +0000 (10:24 -0300)]
Input: elan_i2c - add ACPI ID for touchpad in Lenovo V330-15ISK

This adds ELAN0617 to the ACPI table to support Elan touchpad found in
Lenovo V330-15ISK.

Signed-off-by: Mauro Ciancio <mauro@acadeu.com>
Cc: stable@vger.kernel.org
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
5 years agoInput: st-keyscan - fix potential zalloc NULL dereference
Gabriel Fernandez [Sun, 17 Feb 2019 05:10:16 +0000 (21:10 -0800)]
Input: st-keyscan - fix potential zalloc NULL dereference

This patch fixes the following static checker warning:

drivers/input/keyboard/st-keyscan.c:156 keyscan_probe()
error: potential zalloc NULL dereference: 'keypad_data->input_dev'

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Gabriel Fernandez <gabriel.fernandez@st.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
5 years agoInput: apanel - switch to using brightness_set_blocking()
Dmitry Torokhov [Wed, 6 Feb 2019 18:32:46 +0000 (10:32 -0800)]
Input: apanel - switch to using brightness_set_blocking()

Now that LEDs core allows "blocking" flavor of "set brightness" method we
can use it and get rid of private work item. As a bonus, we are no longer
forgetting to cancel it when we unbind the driver.

Reviewed-by: Sven Van Asbroeck <TheSven73@gmail.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
5 years agopowerpc/64s: Fix possible corruption on big endian due to pgd/pud_present()
Michael Ellerman [Thu, 14 Feb 2019 04:00:36 +0000 (15:00 +1100)]
powerpc/64s: Fix possible corruption on big endian due to pgd/pud_present()

In v4.20 we changed our pgd/pud_present() to check for _PAGE_PRESENT
rather than just checking that the value is non-zero, e.g.:

  static inline int pgd_present(pgd_t pgd)
  {
 -       return !pgd_none(pgd);
 +       return (pgd_raw(pgd) & cpu_to_be64(_PAGE_PRESENT));
  }

Unfortunately this is broken on big endian, as the result of the
bitwise & is truncated to int, which is always zero because
_PAGE_PRESENT is 0x8000000000000000ul. This means pgd_present() and
pud_present() are always false at compile time, and the compiler
elides the subsequent code.

Remarkably with that bug present we are still able to boot and run
with few noticeable effects. However under some work loads we are able
to trigger a warning in the ext4 code:

  WARNING: CPU: 11 PID: 29593 at fs/ext4/inode.c:3927 .ext4_set_page_dirty+0x70/0xb0
  CPU: 11 PID: 29593 Comm: debugedit Not tainted 4.20.0-rc1 #1
  ...
  NIP .ext4_set_page_dirty+0x70/0xb0
  LR  .set_page_dirty+0xa0/0x150
  Call Trace:
   .set_page_dirty+0xa0/0x150
   .unmap_page_range+0xbf0/0xe10
   .unmap_vmas+0x84/0x130
   .unmap_region+0xe8/0x190
   .__do_munmap+0x2f0/0x510
   .__vm_munmap+0x80/0x110
   .__se_sys_munmap+0x14/0x30
   system_call+0x5c/0x70

The fix is simple, we need to convert the result of the bitwise & to
an int before returning it.

Thanks to Erhard, Jan Kara and Aneesh for help with debugging.

Fixes: da7ad366b497 ("powerpc/mm/book3s: Update pmd_present to look at _PAGE_PRESENT bit")
Cc: stable@vger.kernel.org # v4.20+
Reported-by: Erhard F. <erhard_f@mailbox.org>
Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
5 years agoMerge tag 'armsoc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc
Linus Torvalds [Sun, 17 Feb 2019 01:44:12 +0000 (17:44 -0800)]
Merge tag 'armsoc-fixes' of git://git./linux/kernel/git/soc/soc

Pull ARM SoC fixes from Arnd Bergmann:
 "This week is a much smaller update, containing fixes only for TI OMAP,
  NXP i.MX and Rockchips platforms:

  omap:
   - omap4 had problems with lost timer interrupts
   - another IRQ handling issue with OMAP5
   - A workaround for a regression in the pwm-omap-dmtimer driver

  NXP i.MX:
   - eMMC was broken on the new imx8mq-evk board

  Rockchip:
   - a fix for new dtc graph warnings and a regulator fix for rock64
   - USB support broke on rk3328-rock64"

* tag 'armsoc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc:
  ARM: OMAP2+: fix lack of timer interrupts on CPU1 after hotplug
  arm64: dts: imx8mq: Fix boot from eMMC
  ARM: OMAP2+: Variable "reg" in function omap4_dsi_mux_pads() could be uninitialized
  ARM: dts: Configure clock parent for pwm vibra
  bus: ti-sysc: Fix timer handling with drop pm_runtime_irq_safe()
  arm64: dts: rockchip: enable usb-host regulators at boot on rk3328-rock64
  arm64: dts: rockchip: fix graph_port warning on rk3399 bob kevin and excavator
  ARM: OMAP5+: Fix inverted nirq pin interrupts with irq_set_type
  clocksource: timer-ti-dm: Fix pwm dmtimer usage of fck reparenting
  ARM: dts: rockchip: remove qos_cif1 from rk3188 power-domain

5 years agoMerge tag 'nfsd-5.0-2' of git://linux-nfs.org/~bfields/linux
Linus Torvalds [Sun, 17 Feb 2019 01:38:01 +0000 (17:38 -0800)]
Merge tag 'nfsd-5.0-2' of git://linux-nfs.org/~bfields/linux

Pull more nfsd fixes from Bruce Fields:
 "Two small fixes, one for crashes using nfs/krb5 with older enctypes,
  one that could prevent clients from reclaiming state after a kernel
  upgrade"

* tag 'nfsd-5.0-2' of git://linux-nfs.org/~bfields/linux:
  sunrpc: fix 4 more call sites that were using stack memory with a scatterlist
  Revert "nfsd4: return default lease period"

5 years agoMerge tag 'nfs-for-5.0-4' of git://git.linux-nfs.org/projects/anna/linux-nfs
Linus Torvalds [Sun, 17 Feb 2019 01:33:39 +0000 (17:33 -0800)]
Merge tag 'nfs-for-5.0-4' of git://git.linux-nfs.org/projects/anna/linux-nfs

Pull more NFS client fixes from Anna Schumaker:
 "Three fixes this time.

  Nicolas's is for xprtrdma completion vector allocation on single-core
  systems. Greg's adds an error check when allocating a debugfs dentry.
  And Ben's is an additional fix for nfs_page_async_flush() to prevent
  pages from accidentally getting truncated.

  Summary:

   - Make sure Send CQ is allocated on an existing compvec

   - Properly check debugfs dentry before using it

   - Don't use page_file_mapping() after removing a page"

* tag 'nfs-for-5.0-4' of git://git.linux-nfs.org/projects/anna/linux-nfs:
  NFS: Don't use page_file_mapping after removing the page
  rpc: properly check debugfs dentry before using it
  xprtrdma: Make sure Send CQ is allocated on an existing compvec

5 years agoMerge tag 'auxdisplay-for-linus-v5.0-rc7' of git://github.com/ojeda/linux
Linus Torvalds [Sun, 17 Feb 2019 01:31:36 +0000 (17:31 -0800)]
Merge tag 'auxdisplay-for-linus-v5.0-rc7' of git://github.com/ojeda/linux

Pull auxdisplay fix from Miguel Ojeda:
 "Fix potential user-after-free on ht16k33 module unload. Reported by
  Sven Van Asbroeck"

* tag 'auxdisplay-for-linus-v5.0-rc7' of git://github.com/ojeda/linux:
  auxdisplay: ht16k33: fix potential user-after-free on module unload

5 years agoMerge tag 'compiler-attributes-for-linus-v5.0-rc7' of git://github.com/ojeda/linux
Linus Torvalds [Sat, 16 Feb 2019 18:28:05 +0000 (10:28 -0800)]
Merge tag 'compiler-attributes-for-linus-v5.0-rc7' of git://github.com/ojeda/linux

Pull compiler attributes fixes from Miguel Ojeda:
 "Clean the new GCC 9 -Wmissing-attributes warnings

  The upcoming GCC 9 release extends the -Wmissing-attributes warnings
  (enabled by -Wall) to C and aliases: it warns when particular function
  attributes are missing in the aliases but not in their target, e.g.:

    void __cold f(void) {}
    void __alias("f") g(void);

  diagnoses:

    warning: 'g' specifies less restrictive attribute than
    its target 'f': 'cold' [-Wmissing-attributes]

  These patch series clean these new warnings. Most of them are caused
  by the module_init/exit macros"

Link: https://lore.kernel.org/lkml/20190125104353.2791-1-labbott@redhat.com/
* tag 'compiler-attributes-for-linus-v5.0-rc7' of git://github.com/ojeda/linux:
  include/linux/module.h: copy __init/__exit attrs to init/cleanup_module
  Compiler Attributes: add support for __copy (gcc >= 9)
  lib/crc32.c: mark crc32_le_base/__crc32c_le_base aliases as __pure

5 years agoefi/arm: Revert "Defer persistent reservations until after paging_init()"
Ard Biesheuvel [Fri, 15 Feb 2019 12:33:33 +0000 (13:33 +0100)]
efi/arm: Revert "Defer persistent reservations until after paging_init()"

This reverts commit eff896288872d687d9662000ec9ae11b6d61766f, which
deferred the processing of persistent memory reservations to a point
where the memory may have already been allocated and overwritten,
defeating the purpose.

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Acked-by: Will Deacon <will.deacon@arm.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Cc: Mike Rapoport <rppt@linux.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-efi@vger.kernel.org
Link: http://lkml.kernel.org/r/20190215123333.21209-3-ard.biesheuvel@linaro.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
5 years agoarm64, mm, efi: Account for GICv3 LPI tables in static memblock reserve table
Ard Biesheuvel [Fri, 15 Feb 2019 12:33:32 +0000 (13:33 +0100)]
arm64, mm, efi: Account for GICv3 LPI tables in static memblock reserve table

In the irqchip and EFI code, we have what basically amounts to a quirk
to work around a peculiarity in the GICv3 architecture, which permits
the system memory address of LPI tables to be programmable only once
after a CPU reset. This means kexec kernels must use the same memory
as the first kernel, and thus ensure that this memory has not been
given out for other purposes by the time the ITS init code runs, which
is not very early for secondary CPUs.

On systems with many CPUs, these reservations could overflow the
memblock reservation table, and this was addressed in commit:

  eff896288872 ("efi/arm: Defer persistent reservations until after paging_init()")

However, this turns out to have made things worse, since the allocation
of page tables and heap space for the resized memblock reservation table
itself may overwrite the regions we are attempting to reserve, which may
cause all kinds of corruption, also considering that the ITS will still
be poking bits into that memory in response to incoming MSIs.

So instead, let's grow the static memblock reservation table on such
systems so it can accommodate these reservations at an earlier time.
This will permit us to revert the above commit in a subsequent patch.

[ mingo: Minor cleanups. ]

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Acked-by: Mike Rapoport <rppt@linux.ibm.com>
Acked-by: Will Deacon <will.deacon@arm.com>
Acked-by: Marc Zyngier <marc.zyngier@arm.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-efi@vger.kernel.org
Link: http://lkml.kernel.org/r/20190215123333.21209-2-ard.biesheuvel@linaro.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
5 years agoMerge tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi
Linus Torvalds [Fri, 15 Feb 2019 21:36:43 +0000 (13:36 -0800)]
Merge tag 'scsi-fixes' of git://git./linux/kernel/git/jejb/scsi

Pull SCSI fixes from James Bottomley:
 "Two fairly small fixes: the qla one is a panic inducing use after free
  and the entropy fix may seem minor but it has had huge userspace
  impact thanks to an unrelated change in openssl that causes sshd to
  refuse logins until it has enough entropy for the session keys, which
  causes tens of minutes delay before the affected systems allow logins
  after reboot"

* tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
  scsi: qla2xxx: Fix panic from use after free in qla2x00_async_tm_cmd
  scsi: sd: fix entropy gathering for most rotational disks

5 years agosunrpc: fix 4 more call sites that were using stack memory with a scatterlist
Scott Mayhew [Fri, 15 Feb 2019 18:42:02 +0000 (13:42 -0500)]
sunrpc: fix 4 more call sites that were using stack memory with a scatterlist

While trying to reproduce a reported kernel panic on arm64, I discovered
that AUTH_GSS basically doesn't work at all with older enctypes on arm64
systems with CONFIG_VMAP_STACK enabled.  It turns out there still a few
places using stack memory with scatterlists, causing krb5_encrypt() and
krb5_decrypt() to produce incorrect results (or a BUG if CONFIG_DEBUG_SG
is enabled).

Tested with cthon on v4.0/v4.1/v4.2 with krb5/krb5i/krb5p using
des3-cbc-sha1 and arcfour-hmac-md5.

Signed-off-by: Scott Mayhew <smayhew@redhat.com>
Cc: stable@vger.kernel.org
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
5 years agoMerge tag 'omap-for-v5.0/fixes-rc5' of git://git.kernel.org/pub/scm/linux/kernel...
Arnd Bergmann [Fri, 15 Feb 2019 19:39:46 +0000 (20:39 +0100)]
Merge tag 'omap-for-v5.0/fixes-rc5' of git://git./linux/kernel/git/tmlind/linux-omap into arm/fixes

Fix omap4 and later lost cpu1 interrupts for periodic timer

A fix from Russell that took a while to get applied into fixes as
I thought Russell is merging this one.

* tag 'omap-for-v5.0/fixes-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap:
  ARM: OMAP2+: fix lack of timer interrupts on CPU1 after hotplug

5 years agoinclude/linux/module.h: copy __init/__exit attrs to init/cleanup_module
Miguel Ojeda [Sat, 19 Jan 2019 19:59:34 +0000 (20:59 +0100)]
include/linux/module.h: copy __init/__exit attrs to init/cleanup_module

The upcoming GCC 9 release extends the -Wmissing-attributes warnings
(enabled by -Wall) to C and aliases: it warns when particular function
attributes are missing in the aliases but not in their target.

In particular, it triggers for all the init/cleanup_module
aliases in the kernel (defined by the module_init/exit macros),
ending up being very noisy.

These aliases point to the __init/__exit functions of a module,
which are defined as __cold (among other attributes). However,
the aliases themselves do not have the __cold attribute.

Since the compiler behaves differently when compiling a __cold
function as well as when compiling paths leading to calls
to __cold functions, the warning is trying to point out
the possibly-forgotten attribute in the alias.

In order to keep the warning enabled, we decided to silence
this case. Ideally, we would mark the aliases directly
as __init/__exit. However, there are currently around 132 modules
in the kernel which are missing __init/__exit in their init/cleanup
functions (either because they are missing, or for other reasons,
e.g. the functions being called from somewhere else); and
a section mismatch is a hard error.

A conservative alternative was to mark the aliases as __cold only.
However, since we would like to eventually enforce __init/__exit
to be always marked,  we chose to use the new __copy function
attribute (introduced by GCC 9 as well to deal with this).
With it, we copy the attributes used by the target functions
into the aliases. This way, functions that were not marked
as __init/__exit won't have their aliases marked either,
and therefore there won't be a section mismatch.

Note that the warning would go away marking either the extern
declaration, the definition, or both. However, we only mark
the definition of the alias, since we do not want callers
(which only see the declaration) to be compiled as if the function
was __cold (and therefore the paths leading to those calls
would be assumed to be unlikely).

Link: https://lore.kernel.org/lkml/20190123173707.GA16603@gmail.com/
Link: https://lore.kernel.org/lkml/20190206175627.GA20399@gmail.com/
Suggested-by: Martin Sebor <msebor@gcc.gnu.org>
Acked-by: Jessica Yu <jeyu@kernel.org>
Signed-off-by: Miguel Ojeda <miguel.ojeda.sandonis@gmail.com>
5 years agoCompiler Attributes: add support for __copy (gcc >= 9)
Miguel Ojeda [Fri, 8 Feb 2019 22:51:05 +0000 (23:51 +0100)]
Compiler Attributes: add support for __copy (gcc >= 9)

From the GCC manual:

  copy
  copy(function)

    The copy attribute applies the set of attributes with which function
    has been declared to the declaration of the function to which
    the attribute is applied. The attribute is designed for libraries
    that define aliases or function resolvers that are expected
    to specify the same set of attributes as their targets. The copy
    attribute can be used with functions, variables, or types. However,
    the kind of symbol to which the attribute is applied (either
    function or variable) must match the kind of symbol to which
    the argument refers. The copy attribute copies only syntactic and
    semantic attributes but not attributes that affect a symbol’s
    linkage or visibility such as alias, visibility, or weak.
    The deprecated attribute is also not copied.

  https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html

The upcoming GCC 9 release extends the -Wmissing-attributes warnings
(enabled by -Wall) to C and aliases: it warns when particular function
attributes are missing in the aliases but not in their target, e.g.:

    void __cold f(void) {}
    void __alias("f") g(void);

diagnoses:

    warning: 'g' specifies less restrictive attribute than
    its target 'f': 'cold' [-Wmissing-attributes]

Using __copy(f) we can copy the __cold attribute from f to g:

    void __cold f(void) {}
    void __copy(f) __alias("f") g(void);

This attribute is most useful to deal with situations where an alias
is declared but we don't know the exact attributes the target has.

For instance, in the kernel, the widely used module_init/exit macros
define the init/cleanup_module aliases, but those cannot be marked
always as __init/__exit since some modules do not have their
functions marked as such.

Suggested-by: Martin Sebor <msebor@gcc.gnu.org>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Miguel Ojeda <miguel.ojeda.sandonis@gmail.com>
5 years agolib/crc32.c: mark crc32_le_base/__crc32c_le_base aliases as __pure
Miguel Ojeda [Thu, 24 Jan 2019 14:59:11 +0000 (15:59 +0100)]
lib/crc32.c: mark crc32_le_base/__crc32c_le_base aliases as __pure

The upcoming GCC 9 release extends the -Wmissing-attributes warnings
(enabled by -Wall) to C and aliases: it warns when particular function
attributes are missing in the aliases but not in their target.

In particular, it triggers here because crc32_le_base/__crc32c_le_base
aren't __pure while their target crc32_le/__crc32c_le are.

These aliases are used by architectures as a fallback in accelerated
versions of CRC32. See commit 9784d82db3eb ("lib/crc32: make core crc32()
routines weak so they can be overridden").

Therefore, being fallbacks, it is likely that even if the aliases
were called from C, there wouldn't be any optimizations possible.
Currently, the only user is arm64, which calls this from asm.

Still, marking the aliases as __pure makes sense and is a good idea
for documentation purposes and possible future optimizations,
which also silences the warning.

Acked-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Tested-by: Laura Abbott <labbott@redhat.com>
Signed-off-by: Miguel Ojeda <miguel.ojeda.sandonis@gmail.com>
5 years agoauxdisplay: ht16k33: fix potential user-after-free on module unload
Miguel Ojeda [Fri, 8 Feb 2019 23:38:45 +0000 (00:38 +0100)]
auxdisplay: ht16k33: fix potential user-after-free on module unload

On module unload/remove, we need to ensure that work does not run
after we have freed resources. Concretely, cancel_delayed_work()
may return while the callback function is still running.

From kernel/workqueue.c:

    The work callback function may still be running on return,
    unless it returns true and the work doesn't re-arm itself.
    Explicitly flush or use cancel_delayed_work_sync() to wait on it.

Link: https://lore.kernel.org/lkml/20190204220952.30761-1-TheSven73@googlemail.com/
Reported-by: Sven Van Asbroeck <thesven73@gmail.com>
Reviewed-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Reviewed-by: Sven Van Asbroeck <TheSven73@gmail.com>
Acked-by: Robin van der Gracht <robin@protonic.nl>
Signed-off-by: Miguel Ojeda <miguel.ojeda.sandonis@gmail.com>
5 years agoMerge tag 'for-linus-20190215' of git://git.kernel.dk/linux-block
Linus Torvalds [Fri, 15 Feb 2019 17:12:28 +0000 (09:12 -0800)]
Merge tag 'for-linus-20190215' of git://git.kernel.dk/linux-block

Pull block fixes from Jens Axboe:

 - Ensure we insert into the hctx dispatch list, if a request is marked
   as DONTPREP (Jianchao)

 - NVMe pull request, single missing unlock on error fix (Keith)

 - MD pull request, single fix for a potentially data corrupting issue
   (Nate)

 - Floppy check_events regression fix (Yufen)

* tag 'for-linus-20190215' of git://git.kernel.dk/linux-block:
  md/raid1: don't clear bitmap bits on interrupted recovery.
  floppy: check_events callback should not return a negative number
  nvme-pci: add missing unlock for reset error
  blk-mq: insert rq with DONTPREP to hctx dispatch list when requeue

5 years agoMerge tag 'for-5.0/dm-fixes-3' of git://git.kernel.org/pub/scm/linux/kernel/git/devic...
Linus Torvalds [Fri, 15 Feb 2019 16:50:48 +0000 (08:50 -0800)]
Merge tag 'for-5.0/dm-fixes-3' of git://git./linux/kernel/git/device-mapper/linux-dm

Pull device mapper fixes from Mike Snitzer:

 - Fix bug in DM crypt's sizing of its block integrity tag space,
   resulting in less memory use when DM crypt layers on DM integrity.

 - Fix a long-standing DM thinp crash consistency bug that was due to
   improper handling of FUA. This issue is specific to writes that fill
   an entire thinp block which needs to be allocated.

* tag 'for-5.0/dm-fixes-3' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm:
  dm thin: fix bug where bio that overwrites thin block ignores FUA
  dm crypt: don't overallocate the integrity tag space

5 years agoMerge tag 'mmc-v5.0-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc
Linus Torvalds [Fri, 15 Feb 2019 16:45:28 +0000 (08:45 -0800)]
Merge tag 'mmc-v5.0-rc5' of git://git./linux/kernel/git/ulfh/mmc

Pull MMC fixes from Ulf Hansson:
 "A couple of MMC fixes intended for v5.0-rc7.

  MMC core:
   - Fix deadlock bug for block I/O requests

  MMC host:
   - sunxi: Disable broken HS-DDR mode for H5 by default
   - sunxi: Avoid unsupported speed modes declared via DT
   - meson-gx: Restore interrupt name"

* tag 'mmc-v5.0-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc:
  mmc: meson-gx: fix interrupt name
  mmc: block: handle complete_work on separate workqueue
  mmc: sunxi: Filter out unsupported modes declared in the device tree
  mmc: sunxi: Disable HS-DDR mode for H5 eMMC controller by default

5 years agoMerge tag 'drm-fixes-2019-02-15-1' of git://anongit.freedesktop.org/drm/drm
Linus Torvalds [Fri, 15 Feb 2019 16:20:33 +0000 (08:20 -0800)]
Merge tag 'drm-fixes-2019-02-15-1' of git://anongit.freedesktop.org/drm/drm

Pull drm fixes from Dave Airlie:
 "Usual pull request, little larger than I'd like but nothing too
  strange in it. Willy found an bug in the lease ioctl calculations, but
  it's a drm master only ioctl which makes it harder to mess with.

 i915:
   - combo phy programming fix
   - opregion version check fix for VBT RVDA lookup
   - gem mmap ioctl race fix
   - fbdev hpd during suspend fix
   - array size bounds check fix in pmu

  amdgpu:
   - Vega20 psp fix
   - Add vrr range to debugfs for freesync debugging

  sched:
   - Scheduler race fix

  vkms:
   - license header fixups

  imx:
   - Fix CSI register offsets for i.MX51 and i.MX53.
   - Fix delayed page flip completion events on i.MX6QP due to
     unexpected behaviour of the PRE when issuing NOP buffer updates to
     the same buffer address.
   - Stop throwing errors for plane updates on disabled CRTCs when a
     userspace process is killed while a plane update is pending.
   - Add missing of_node_put cleanup in imx_ldb_bind"

* tag 'drm-fixes-2019-02-15-1' of git://anongit.freedesktop.org/drm/drm:
  drm: Use array_size() when creating lease
  drm/amdgpu/psp11: TA firmware is optional (v3)
  drm/i915/opregion: rvda is relative from opregion base in opregion 2.1+
  drm/i915/opregion: fix version check
  drm/i915: Prevent a race during I915_GEM_MMAP ioctl with WC set
  drm/i915: Block fbdev HPD processing during suspend
  drm/i915/pmu: Fix enable count array size and bounds checking
  drm/i915/cnl: Fix CNL macros for Voltage Swing programming
  drm/i915/icl: combo port vswing programming changes per BSPEC
  drm/vkms: Fix license inconsistent
  drm/amd/display: Expose connector VRR range via debugfs
  drm/sched: Always trace the dependencies we wait on, to fix a race.
  gpu: ipu-v3: pre: don't trigger update if buffer address doesn't change
  gpu: ipu-v3: Fix CSI offsets for imx53
  drm/imx: imx-ldb: add missing of_node_puts
  gpu: ipu-v3: Fix i.MX51 CSI control registers offset
  drm/imx: ignore plane updates on disabled crtcs

5 years agoMerge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6
Linus Torvalds [Fri, 15 Feb 2019 16:11:43 +0000 (08:11 -0800)]
Merge branch 'linus' of git://git./linux/kernel/git/herbert/crypto-2.6

Pull crypto fix from Herbert Xu:
 "This fixes a crash on resume in the ccree driver"

* 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6:
  crypto: ccree - fix resume race condition on init

5 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Linus Torvalds [Fri, 15 Feb 2019 16:00:11 +0000 (08:00 -0800)]
Merge git://git./linux/kernel/git/davem/net

Pull networking fixes from David Miller:

 1) Fix MAC address setting in mac80211 pmsr code, from Johannes Berg.

 2) Probe SFP modules after being attached, from Russell King.

 3) Byte ordering bug in SMC rx_curs_confirmed code, from Ursula Braun.

 4) Revert some r8169 changes that are causing regressions, from Heiner
    Kallweit.

 5) Fix spurious connection timeouts in netfilter nat code, from Florian
    Westphal.

 6) SKB leak in tipc, from Hoang Le.

 7) Short packet checkum issue in mlx4, similar to a previous mlx5
    change, from Saeed Mahameed. The issue is that whilst padding bytes
    are usually zero, it is not guarateed and the hardware doesn't take
    the padding bytes into consideration when generating the checksum.

 8) Fix various races in cls_tcindex, from Cong Wang.

 9) Need to set stream ext to NULL before freeing in SCTP code, from Xin
    Long.

10) Fix locking in phy_is_started, from Heiner Kallweit.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (54 commits)
  net: ethernet: freescale: set FEC ethtool regs version
  net: hns: Fix object reference leaks in hns_dsaf_roce_reset()
  mm: page_alloc: fix ref bias in page_frag_alloc() for 1-byte allocs
  net: phy: fix potential race in the phylib state machine
  net: phy: don't use locking in phy_is_started
  selftests: fix timestamping Makefile
  net: dsa: bcm_sf2: potential array overflow in bcm_sf2_sw_suspend()
  net: fix possible overflow in __sk_mem_raise_allocated()
  dsa: mv88e6xxx: Ensure all pending interrupts are handled prior to exit
  net: phy: fix interrupt handling in non-started states
  sctp: set stream ext to NULL after freeing it in sctp_stream_outq_migrate
  sctp: call gso_reset_checksum when computing checksum in sctp_gso_segment
  net/mlx5e: XDP, fix redirect resources availability check
  net/mlx5: Fix a compilation warning in events.c
  net/mlx5: No command allowed when command interface is not ready
  net/mlx5e: Fix NULL pointer derefernce in set channels error flow
  netfilter: nft_compat: use-after-free when deleting targets
  team: avoid complex list operations in team_nl_cmd_options_set()
  net_sched: fix two more memory leaks in cls_tcindex
  net_sched: fix a memory leak in cls_tcindex
  ...

5 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm...
Linus Torvalds [Fri, 15 Feb 2019 15:56:24 +0000 (07:56 -0800)]
Merge branch 'for-linus' of git://git./linux/kernel/git/ebiederm/user-namespace

Pull signal fix from Eric Biederman:
 "Just a single patch that restores PTRACE_EVENT_EXIT functionality that
  was accidentally broken by last weeks fixes"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace:
  signal: Restore the stop PTRACE_EVENT_EXIT

5 years agox86/platform/UV: Use efi_runtime_lock to serialise BIOS calls
Hedi Berriche [Wed, 13 Feb 2019 19:34:13 +0000 (19:34 +0000)]
x86/platform/UV: Use efi_runtime_lock to serialise BIOS calls

Calls into UV firmware must be protected against concurrency, expose the
efi_runtime_lock to the UV platform, and use it to serialise UV BIOS
calls.

Signed-off-by: Hedi Berriche <hedi.berriche@hpe.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Reviewed-by: Russ Anderson <rja@hpe.com>
Reviewed-by: Dimitri Sivanich <sivanich@hpe.com>
Reviewed-by: Mike Travis <mike.travis@hpe.com>
Cc: Andy Shevchenko <andy@infradead.org>
Cc: Bhupesh Sharma <bhsharma@redhat.com>
Cc: Darren Hart <dvhart@infradead.org>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: linux-efi <linux-efi@vger.kernel.org>
Cc: platform-driver-x86@vger.kernel.org
Cc: stable@vger.kernel.org # v4.9+
Cc: Steve Wahl <steve.wahl@hpe.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: x86-ml <x86@kernel.org>
Link: https://lkml.kernel.org/r/20190213193413.25560-5-hedi.berriche@hpe.com
5 years agoMerge tag 'imx-fixes-5.0-3' of git://git.kernel.org/pub/scm/linux/kernel/git/shawnguo...
Arnd Bergmann [Fri, 15 Feb 2019 12:43:08 +0000 (13:43 +0100)]
Merge tag 'imx-fixes-5.0-3' of git://git./linux/kernel/git/shawnguo/linux into arm/fixes

i.MX fixes for 5.0, 3rd round:

It contains a fix for i.MX8MQ EVK board device tree, which makes the
broken eMMC support work as expected.

* tag 'imx-fixes-5.0-3' of git://git.kernel.org/pub/scm/linux/kernel/git/shawnguo/linux:
  arm64: dts: imx8mq: Fix boot from eMMC

5 years agoMerge tag 'v5.0-rockchip-dts64fixes-1' of git://git.kernel.org/pub/scm/linux/kernel...
Arnd Bergmann [Fri, 15 Feb 2019 12:41:45 +0000 (13:41 +0100)]
Merge tag 'v5.0-rockchip-dts64fixes-1' of git://git./linux/kernel/git/mmind/linux-rockchip into arm/fixes

Fix for new dtc graph warnings and a regulator fix for rock64.

* tag 'v5.0-rockchip-dts64fixes-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mmind/linux-rockchip:
  arm64: dts: rockchip: enable usb-host regulators at boot on rk3328-rock64
  arm64: dts: rockchip: fix graph_port warning on rk3399 bob kevin and excavator

5 years agoMerge tag 'v5.0-rockchip-dts32fixes-1' of git://git.kernel.org/pub/scm/linux/kernel...
Arnd Bergmann [Fri, 15 Feb 2019 12:41:11 +0000 (13:41 +0100)]
Merge tag 'v5.0-rockchip-dts32fixes-1' of git://git./linux/kernel/git/mmind/linux-rockchip into arm/fixes

Drop one non-existent component from powerdomain list.

* tag 'v5.0-rockchip-dts32fixes-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mmind/linux-rockchip:
  ARM: dts: rockchip: remove qos_cif1 from rk3188 power-domain

5 years agoMerge tag 'omap-for-v5.0/fixes-rc4' of git://git.kernel.org/pub/scm/linux/kernel...
Arnd Bergmann [Fri, 15 Feb 2019 12:38:20 +0000 (13:38 +0100)]
Merge tag 'omap-for-v5.0/fixes-rc4' of git://git./linux/kernel/git/tmlind/linux-omap into fixes

SoC fixes for omaps for v5.0-rc cycle

This series contains two SoC regression fixes and one uninitialized
variable fix:

- Fix inverted nirq pin handling for omap5 that started producing
  warnings with earlier GIC direction checks and took a while to
  understand and confirm. Basically there are two sys_nirq pins
  that are bypassing peripheral modules and inverted automatically
  by the SoC and need to be handled with a custom irq_set_type()

- Recent ti-sysc changes caused a regression to the pwm-omap-dmtimer
  code where the device tree handling code for timer source clock
  gets confused. It looks like we can remove that code eventually,
  but for now we just drop a bogus pm_runtime_irq_safe() for the
  timers with the related quirks caused by pm_runtime_irq_safe(),
  and have the standard assigned-clocks and assigned-clock-parents
  deal with setting the source clock

- Fix potentially uninitialized value for display init code if
  regmap_read() fails

* tag 'omap-for-v5.0/fixes-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap:
  ARM: OMAP2+: Variable "reg" in function omap4_dsi_mux_pads() could be uninitialized
  ARM: dts: Configure clock parent for pwm vibra
  bus: ti-sysc: Fix timer handling with drop pm_runtime_irq_safe()
  ARM: OMAP5+: Fix inverted nirq pin interrupts with irq_set_type
  clocksource: timer-ti-dm: Fix pwm dmtimer usage of fck reparenting

5 years agoi2c: bcm2835: Clear current buffer pointers and counts after a transfer
Paul Kocialkowski [Thu, 27 Dec 2018 15:42:25 +0000 (16:42 +0100)]
i2c: bcm2835: Clear current buffer pointers and counts after a transfer

The driver's interrupt handler checks whether a message is currently
being handled with the curr_msg pointer. When it is NULL, the interrupt
is considered to be unexpected. Similarly, the i2c_start_transfer
routine checks for the remaining number of messages to handle in
num_msgs.

However, these values are never cleared and always keep the message and
number relevant to the latest transfer (which might be done already and
the underlying message memory might have been freed).

When an unexpected interrupt hits with the DONE bit set, the isr will
then try to access the flags field of the curr_msg structure, leading
to a fatal page fault.

The msg_buf and msg_buf_remaining fields are also never cleared at the
end of the transfer, which can lead to similar pitfalls.

Fix these issues by introducing a cleanup function and always calling
it after a transfer is finished.

Fixes: e2474541032d ("i2c: bcm2835: Fix hang for writing messages larger than 16 bytes")
Signed-off-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
Acked-by: Stefan Wahren <stefan.wahren@i2se.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
5 years agoi2c: cadence: Fix the hold bit setting
Shubhrajyoti Datta [Tue, 5 Feb 2019 11:12:53 +0000 (16:42 +0530)]
i2c: cadence: Fix the hold bit setting

In case the hold bit is not needed we are carrying the old values.
Fix the same by resetting the bit when not needed.

Fixes the sporadic i2c bus lockups on National Instruments
Zynq-based devices.

Fixes: df8eb5691c48 ("i2c: Add driver for Cadence I2C controller")
Reported-by: Kyle Roeschley <kyle.roeschley@ni.com>
Acked-by: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: Shubhrajyoti Datta <shubhrajyoti.datta@xilinx.com>
Tested-by: Kyle Roeschley <kyle.roeschley@ni.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
5 years agodrm: Use array_size() when creating lease
Matthew Wilcox [Thu, 14 Feb 2019 19:03:48 +0000 (11:03 -0800)]
drm: Use array_size() when creating lease

Passing an object_count of sufficient size will make
object_count * 4 wrap around to be very small, then a later function
will happily iterate off the end of the object_ids array.  Using
array_size() will saturate at SIZE_MAX, the kmalloc() will fail and
we'll return an -ENOMEM to the norty userspace.

Fixes: 62884cd386b8 ("drm: Add four ioctls for managing drm mode object leases [v7]")
Signed-off-by: Matthew Wilcox <willy@infradead.org>
Acked-by: Kees Cook <keescook@chromium.org>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: <stable@vger.kernel.org> # v4.15+
Signed-off-by: Dave Airlie <airlied@redhat.com>
5 years agoMerge branch 'drm-fixes-5.0' of git://people.freedesktop.org/~agd5f/linux into drm...
Dave Airlie [Fri, 15 Feb 2019 01:46:40 +0000 (11:46 +1000)]
Merge branch 'drm-fixes-5.0' of git://people.freedesktop.org/~agd5f/linux into drm-fixes

amdgpu:
- Vega20 psp fix
- Add vrr range to debugfs for freesync debugging

sched:
- Scheduler race fix

Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Alex Deucher <alexdeucher@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190213202958.3336-1-alexander.deucher@amd.com
5 years agoMerge tag 'drm-intel-fixes-2019-02-13' of git://anongit.freedesktop.org/drm/drm-intel...
Dave Airlie [Fri, 15 Feb 2019 01:22:37 +0000 (11:22 +1000)]
Merge tag 'drm-intel-fixes-2019-02-13' of git://anongit.freedesktop.org/drm/drm-intel into drm-fixes

drm/i915 fixes for v5.0-rc7:
- combo phy programming fix
- opregion version check fix for VBT RVDA lookup
- gem mmap ioctl race fix
- fbdev hpd during suspend fix
- array size bounds check fix in pmu

Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/877ee3504b.fsf@intel.com
5 years agoMerge tag 'drm-misc-fixes-2019-02-13' of git://anongit.freedesktop.org/drm/drm-misc...
Dave Airlie [Fri, 15 Feb 2019 01:21:46 +0000 (11:21 +1000)]
Merge tag 'drm-misc-fixes-2019-02-13' of git://anongit.freedesktop.org/drm/drm-misc into drm-fixes

drm-misc-fixes for v5.0:
- Fix license inconsistency in vkms.

Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/812e2f53-d72a-8fba-6c8c-fde8f44cf141@linux.intel.com
5 years agodm thin: fix bug where bio that overwrites thin block ignores FUA
Nikos Tsironis [Thu, 14 Feb 2019 18:38:47 +0000 (20:38 +0200)]
dm thin: fix bug where bio that overwrites thin block ignores FUA

When provisioning a new data block for a virtual block, either because
the block was previously unallocated or because we are breaking sharing,
if the whole block of data is being overwritten the bio that triggered
the provisioning is issued immediately, skipping copying or zeroing of
the data block.

When this bio completes the new mapping is inserted in to the pool's
metadata by process_prepared_mapping(), where the bio completion is
signaled to the upper layers.

This completion is signaled without first committing the metadata.  If
the bio in question has the REQ_FUA flag set and the system crashes
right after its completion and before the next metadata commit, then the
write is lost despite the REQ_FUA flag requiring that I/O completion for
this request must only be signaled after the data has been committed to
non-volatile storage.

Fix this by deferring the completion of overwrite bios, with the REQ_FUA
flag set, until after the metadata has been committed.

Cc: stable@vger.kernel.org
Signed-off-by: Nikos Tsironis <ntsironis@arrikto.com>
Acked-by: Joe Thornber <ejt@redhat.com>
Acked-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
5 years agoRevert "exec: load_script: don't blindly truncate shebang string"
Linus Torvalds [Thu, 14 Feb 2019 23:02:18 +0000 (15:02 -0800)]
Revert "exec: load_script: don't blindly truncate shebang string"

This reverts commit 8099b047ecc431518b9bb6bdbba3549bbecdc343.

It turns out that people do actually depend on the shebang string being
truncated, and on the fact that an interpreter (like perl) will often
just re-interpret it entirely to get the full argument list.

Reported-by: Samuel Dionne-Riel <samuel@dionne-riel.com>
Acked-by: Kees Cook <keescook@chromium.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>