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737516 commits

Author SHA1 Message Date
Sagar Arun Kamble
70deeaddc6 drm/i915/guc: Fix lockdep due to log relay channel handling under struct_mutex
This patch fixes lockdep issue due to circular locking dependency of
struct_mutex, i_mutex_key, mmap_sem, relay_channels_mutex.
For GuC log relay channel we create debugfs file that requires i_mutex_key
lock and we are doing that under struct_mutex. So we introduced newer
dependency as:
    &dev->struct_mutex --> &sb->s_type->i_mutex_key#3 --> &mm->mmap_sem
However, there is dependency from mmap_sem to struct_mutex. Hence we
separate the relay create/destroy operation from under struct_mutex.
Also added runtime check of relay buffer status.
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>

======================================================
WARNING: possible circular locking dependency detected
4.15.0-rc6-CI-Patchwork_7614+ #1 Not tainted
------------------------------------------------------
debugfs_test/1388 is trying to acquire lock:
 (&dev->struct_mutex){+.+.}, at: [<00000000d5e1d915>] i915_mutex_lock_interruptible+0x47/0x130 [i915]

but task is already holding lock:
 (&mm->mmap_sem){++++}, at: [<0000000029a9c131>] __do_page_fault+0x106/0x560

which lock already depends on the new lock.

the existing dependency chain (in reverse order) is:

-> #3 (&mm->mmap_sem){++++}:
       _copy_to_user+0x1e/0x70
       filldir+0x8c/0xf0
       dcache_readdir+0xeb/0x160
       iterate_dir+0xdc/0x140
       SyS_getdents+0xa0/0x130
       entry_SYSCALL_64_fastpath+0x1c/0x89

-> #2 (&sb->s_type->i_mutex_key#3){++++}:
       start_creating+0x59/0x110
       __debugfs_create_file+0x2e/0xe0
       relay_create_buf_file+0x62/0x80
       relay_late_setup_files+0x84/0x250
       guc_log_late_setup+0x4f/0x110 [i915]
       i915_guc_log_register+0x32/0x40 [i915]
       i915_driver_load+0x7b6/0x1720 [i915]
       i915_pci_probe+0x2e/0x90 [i915]
       pci_device_probe+0x9c/0x120
       driver_probe_device+0x2a3/0x480
       __driver_attach+0xd9/0xe0
       bus_for_each_dev+0x57/0x90
       bus_add_driver+0x168/0x260
       driver_register+0x52/0xc0
       do_one_initcall+0x39/0x150
       do_init_module+0x56/0x1ef
       load_module+0x231c/0x2d70
       SyS_finit_module+0xa5/0xe0
       entry_SYSCALL_64_fastpath+0x1c/0x89

-> #1 (relay_channels_mutex){+.+.}:
       relay_open+0x12c/0x2b0
       intel_guc_log_runtime_create+0xab/0x230 [i915]
       intel_guc_init+0x81/0x120 [i915]
       intel_uc_init+0x29/0xa0 [i915]
       i915_gem_init+0x182/0x530 [i915]
       i915_driver_load+0xaa9/0x1720 [i915]
       i915_pci_probe+0x2e/0x90 [i915]
       pci_device_probe+0x9c/0x120
       driver_probe_device+0x2a3/0x480
       __driver_attach+0xd9/0xe0
       bus_for_each_dev+0x57/0x90
       bus_add_driver+0x168/0x260
       driver_register+0x52/0xc0
       do_one_initcall+0x39/0x150
       do_init_module+0x56/0x1ef
       load_module+0x231c/0x2d70
       SyS_finit_module+0xa5/0xe0
       entry_SYSCALL_64_fastpath+0x1c/0x89

-> #0 (&dev->struct_mutex){+.+.}:
       __mutex_lock+0x81/0x9b0
       i915_mutex_lock_interruptible+0x47/0x130 [i915]
       i915_gem_fault+0x201/0x790 [i915]
       __do_fault+0x15/0x70
       __handle_mm_fault+0x677/0xdc0
       handle_mm_fault+0x14f/0x2f0
       __do_page_fault+0x2d1/0x560
       page_fault+0x4c/0x60

other info that might help us debug this:

Chain exists of:
  &dev->struct_mutex --> &sb->s_type->i_mutex_key#3 --> &mm->mmap_sem

 Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  lock(&mm->mmap_sem);
                               lock(&sb->s_type->i_mutex_key#3);
                               lock(&mm->mmap_sem);
  lock(&dev->struct_mutex);

 *** DEADLOCK ***

1 lock held by debugfs_test/1388:
 #0:  (&mm->mmap_sem){++++}, at: [<0000000029a9c131>] __do_page_fault+0x106/0x560

stack backtrace:
CPU: 2 PID: 1388 Comm: debugfs_test Not tainted 4.15.0-rc6-CI-Patchwork_7614+ #1
Hardware name: To Be Filled By O.E.M. To Be Filled By O.E.M./J4205-ITX, BIOS P1.10 09/29/2016
Call Trace:
 dump_stack+0x5f/0x86
 print_circular_bug.isra.18+0x1d0/0x2c0
 __lock_acquire+0x14ae/0x1b60
 ? lock_acquire+0xaf/0x200
 lock_acquire+0xaf/0x200
 ? i915_mutex_lock_interruptible+0x47/0x130 [i915]
 __mutex_lock+0x81/0x9b0
 ? i915_mutex_lock_interruptible+0x47/0x130 [i915]
 ? i915_mutex_lock_interruptible+0x47/0x130 [i915]
 ? i915_mutex_lock_interruptible+0x47/0x130 [i915]
 i915_mutex_lock_interruptible+0x47/0x130 [i915]
 ? __pm_runtime_resume+0x4f/0x80
 i915_gem_fault+0x201/0x790 [i915]
 __do_fault+0x15/0x70
 ? _raw_spin_unlock+0x29/0x40
 __handle_mm_fault+0x677/0xdc0
 handle_mm_fault+0x14f/0x2f0
 __do_page_fault+0x2d1/0x560
 ? page_fault+0x36/0x60
 page_fault+0x4c/0x60

v2: Added lock protection to guc->log.runtime.relay_chan (Chris)
    Fixed locking inside guc_flush_logs uncovered by new lockdep.

v3: Locking guc_read_update_log_buffer entirely with relay_lock. (Chris)
    Prepared intel_guc_init_early. Moved relay_lock inside relay_create
    relay_destroy, relay_file_create, guc_read_update_log_buffer. (Michal)
    Removed struct_mutex lock around guc_log_flush and removed usage
    of guc_log_has_relay() from runtime_create path as it needs
    struct_mutex lock.

v4: Handle NULL relay sub buffer pointer earlier in read_update_log_buffer
    (Chris). Fixed comment suffix **/. (Michal)

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=104693
Testcase: igt/debugfs_test/read_all_entries # with enable_guc=1 and guc_log_level=1
Signed-off-by: Sagar Arun Kamble <sagar.a.kamble@intel.com>
Cc: Michal Wajdeczko <michal.wajdeczko@intel.com>
Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Marta Lofstedt <marta.lofstedt@intel.com>
Cc: Michal Winiarski <michal.winiarski@intel.com>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/1516808821-3638-3-git-send-email-sagar.a.kamble@intel.com
2018-01-24 19:44:04 +00:00
Sagar Arun Kamble
1ed21cb414 drm/i915/guc: Enable interrupts before resuming GuC during runtime resume
GuC log streaming needs interrupts enabled prior to GuC resume but
runtime pm interrupt setup was happening post GuC resume. Fix it.
While at it, fix the unwinding of steps in the runtime suspend path.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=104695
Signed-off-by: Sagar Arun Kamble <sagar.a.kamble@intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Michal Wajdeczko <michal.wajdeczko@intel.com>
Cc: Michał Winiarski <michal.winiarski@intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Marta Lofstedt <marta.lofstedt@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/1516808821-3638-2-git-send-email-sagar.a.kamble@intel.com
2018-01-24 19:44:03 +00:00
Sagar Arun Kamble
1be333d34e drm/i915/guc: Grab RPM wakelock while disabling GuC interrupts
Disabling GuC interrupts involves access to GuC IRQ control registers
hence ensure device is RPM awake.

v1-v2: old changelog
1: Add comment about need to synchronize flush work and log runtime
   destroy
2: Moved patch earlier in the series and removed comment about future
work. (Tvrtko)

v3: Added assert_rpm_wakelock_held() to gen9_*_guc_interrupts. (Chris)

Signed-off-by: Sagar Arun Kamble <sagar.a.kamble@intel.com>
Cc: Michal Wajdeczko <michal.wajdeczko@intel.com>
Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/1516808821-3638-1-git-send-email-sagar.a.kamble@intel.com
2018-01-24 19:44:02 +00:00
Josef Bacik
e4fd493c05 Btrfs: fix stale entries in readdir
In fixing the readdir+pagefault deadlock I accidentally introduced a
stale entry regression in readdir.  If we get close to full for the
temporary buffer, and then skip a few delayed deletions, and then try to
add another entry that won't fit, we will emit the entries we found and
retry.  Unfortunately we delete entries from our del_list as we find
them, assuming we won't need them.  However our pos will be with
whatever our last entry was, which could be before the delayed deletions
we skipped, so the next search will add the deleted entries back into
our readdir buffer.  So instead don't delete entries we find in our
del_list so we can make sure we always find our delayed deletions.  This
is a slight perf hit for readdir with lots of pending deletions, but
hopefully this isn't a common occurrence.  If it is we can revist this
and optimize it.

cc: stable@vger.kernel.org
Fixes: 23b5ec7494 ("btrfs: fix readdir deadlock with pagefault")
Signed-off-by: Josef Bacik <jbacik@fb.com>
Signed-off-by: David Sterba <dsterba@suse.com>
2018-01-24 20:27:48 +01:00
Tedd Ho-Jeong An
faf174d297 Bluetooth: btintel: Create common Intel Read Boot Params function
The Intel_Read_Boot_Params command is used to read boot parameters
from the bootloader and this is Intel generic command used in USB
and UART drivers.

Signed-off-by: Tedd Ho-Jeong An <tedd.an@linux.intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2018-01-24 19:31:49 +01:00
Tedd Ho-Jeong An
04d729b8a5 Bluetooth: btintel: Use boot parameter from firmware file
Each RAM SKU has a different boot parameter which is used in
HCI_Intel_Reset command after downloading the firmware.
The boot parameter is embedded in the firmware data and to support
multiple SKUs, driver reads the boot parameter while downloading
the firmware instead of using static values per SKU.

Signed-off-by: Tedd Ho-Jeong An <tedd.an@linux.intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2018-01-24 19:31:49 +01:00
Tedd Ho-Jeong An
e5889af62f Bluetooth: btintel: Create common function for Intel Reset
The Intel_Reset command is used to reset the device after downloading
the firmware and this is Intel generic command used in both USB and
UART.

Signed-off-by: Tedd Ho-Jeong An <tedd.an@linux.intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2018-01-24 19:31:49 +01:00
Tedd Ho-Jeong An
965651c16b Bluetooth: hci_intel: Update firmware filename for Intel 9x60 and later
The format of Intel Bluetooth firmware for bootloader product is
ibt-<hw_variant>-<device_revision_id>.sfi and .ddc.

But for the 9x60 SKU, there are three variants of FW, which cannot be
differenticate just with hw_variant and device_revision_id.
So, to pick the appropriate FW file for 9x60 SKU, three fields,
hw_variant, hw_revision, and fw_revision, needs to be used rather than
hw_variant and device_revision_id.

Format will be like this:
ibt-<hw_variant>-<hw_revision>-<fw_revision>.sfi and .ddc

Signed-off-by: Tedd Ho-Jeong An <tedd.an@linux.intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2018-01-24 19:31:49 +01:00
Arvind Yadav
d3fdd70124 pcmcia: soc_common: Handle return value of clk_prepare_enable
clk_prepare_enable() can fail here and we must check its return value.

Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
CC: Russell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
2018-01-24 19:24:39 +01:00
Dominik Brodowski
3490a69bdd pcmcia: use proper printk format for resource
Even though it is just in a dev_dbg statement, improve the printk format
to use %pr instead of plain %p.

Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
2018-01-24 19:24:38 +01:00
Dominik Brodowski
af87fae7c1 pcmcia: remove mailing list, update MAINTAINERS
In recent years, the linux-pcmcia mailing list gained a pretty bad
signal-to-noise ratio. It does not seem worth the hassle to keep it
any longer. Thanks to David for hosting the list for the last couple
of years!

Acked-by: David Woodhouse <dwmw2@infradead.org>
CC: Russell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
2018-01-24 19:24:26 +01:00
Ville Syrjälä
16af25faae drm/i915: Add a comment exlaining CCS hsub/vsub
Let's document why we claim hsub==8,vsub==16 for CCS.

v2: Replace my explanation with Jason's

Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: Ben Widawsky <ben@bwidawsk.net>
Cc: Jason Ekstrand <jason@jlekstrand.net>
Cc: Daniel Stone <daniels@collabora.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180119144152.17224-1-ville.syrjala@linux.intel.com
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
2018-01-24 20:13:53 +02:00
Ville Syrjälä
0519c102f5 drm/i915: Implement display w/a #1143
Apparently SKL/KBL/CFL need some manual help to get the
programmed HDMI vswing to stick. Implement the relevant
workaround (display w/a #1143).

Note that the relevant chicken bits live in a transcoder register
even though the bits affect a specific DDI port rather than a
specific transcoder. Hence we must pick the correct transcoder
register instance based on the port rather than based on the
cpu_transcoder.

Also note that for completeness I included support for DDI A/E
in the code even though we never have HDMI on those ports.

v2: CFL needs the w/a as well (Rodrigo and Art)

Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Art Runyan <arthur.j.runyan@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180122174131.28046-1-ville.syrjala@linux.intel.com
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
2018-01-24 20:09:29 +02:00
Linus Torvalds
03fae44b41 With the new ORC unwinder, ftrace stack tracing became disfunctional.
One was that ORC didn't know how to handle the ftrace callbacks in general
 (which Josh fixed). The other was that ORC would just bail if it hit a
 dynamically allocated trampoline. Which means all ftrace stack tracing that
 happens from the function tracer would produce no results (that includes
 killing the max stack size tracer).  I added a check to the ORC unwinder to
 see if the trampoline belonged to ftrace, and if it did, use the orc entry
 of the static trampoline that was used to create the dynamic one (it would
 be identical).
 
 Finally, I noticed that the skip values of the stack tracing were out of
 whack. I went through and fixed them up.
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Merge tag 'trace-v4.15-rc9' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace

Pull tracing fixes from Steven Rostedt:
 "With the new ORC unwinder, ftrace stack tracing became disfunctional.

  One was that ORC didn't know how to handle the ftrace callbacks in
  general (which Josh fixed).

  The other was that ORC would just bail if it hit a dynamically
  allocated trampoline. Which means all ftrace stack tracing that
  happens from the function tracer would produce no results (that
  includes killing the max stack size tracer). I added a check to the
  ORC unwinder to see if the trampoline belonged to ftrace, and if it
  did, use the orc entry of the static trampoline that was used to
  create the dynamic one (it would be identical).

  Finally, I noticed that the skip values of the stack tracing were out
  of whack. I went through and fixed them up"

* tag 'trace-v4.15-rc9' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
  tracing: Update stack trace skipping for ORC unwinder
  ftrace, orc, x86: Handle ftrace dynamically allocated trampolines
  x86/ftrace: Fix ORC unwinding from ftrace handlers
2018-01-24 10:08:16 -08:00
Willy Tarreau
ce30f264b3 MAINTAINERS: clarify that only verified bugs should be submitted to security@
We're seeing a raise of automated reports from testing tools and reports
about address leaks that are not really exploitable as-is, many of which
do not represent an immediate risk justifying to work in closed places.

Signed-off-by: Willy Tarreau <w@1wt.eu>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2018-01-24 10:05:53 -08:00
Mylene JOSSERAND
eda85d1fee
ASoC: sun8i-codec: Add ADC support for a33
Add ADC support for the sun8i-codec driver.

This driver uses microphones widgets and routes provided by the
analog part (sun8i-codec-analog).
Some digital configurations are needed by creating new ADC widgets
and routes.

Signed-off-by: Mylène Josserand <mylene.josserand@free-electrons.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2018-01-24 17:31:06 +00:00
Axel Lin
9d4853322f
regulator: qcom_spmi: Use regmap helpers for enable/disable/is_enabled callback
Setup .enable_reg/.enable_mask/.enable_val fields, then we can use the
regmap helpers for enable/disable/is_enabled callback implementation.

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2018-01-24 17:31:01 +00:00
Jeffy Chen
fde7f9dbc7
ASoC: rockchip: Use dummy_dai for rt5514 dsp dailink
The rt5514 dsp captures pcm data through spi directly, so we should not
use rockchip-i2s as it's cpu dai like other codecs.

Use dummy_dai for rt5514 dsp dailink to make voice wakeup work again.

Reported-by: Jimmy Cheng-Yi Chiang <cychiang@google.com>
Fixes: (72cfb0f20c ASoC: rockchip: Use codec of_node and dai_name for rt5514 dsp)
Signed-off-by: Jeffy Chen <jeffy.chen@rock-chips.com>
Tested-by: Brian Norris <briannorris@chromium.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
2018-01-24 17:30:55 +00:00
Ville Syrjälä
c19e1124e7 drm/i915: Use enum plane_id for frontbuffer tracking
Replace the ad-hoc plane indexing scheme used by the frontbuffer
tracking with enum plane_id.

The old video overlay not being part of the plane_id namespace
will just be given the high bit.

v2: Drop the unintended whitespace change (Chris)

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180123183343.9181-1-ville.syrjala@linux.intel.com
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
2018-01-24 19:13:59 +02:00
Greg Kroah-Hartman
5132ede0fe Revert "module: Add retpoline tag to VERMAGIC"
This reverts commit 6cfb521ac0.

Turns out distros do not want to make retpoline as part of their "ABI",
so this patch should not have been merged.  Sorry Andi, this was my
fault, I suggested it when your original patch was the "correct" way of
doing this instead.

Reported-by: Jiri Kosina <jikos@kernel.org>
Fixes: 6cfb521ac0 ("module: Add retpoline tag to VERMAGIC")
Acked-by: Andi Kleen <ak@linux.intel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: David Woodhouse <dwmw@amazon.co.uk>
Cc: rusty@rustcorp.com.au
Cc: arjan.van.de.ven@intel.com
Cc: jeyu@kernel.org
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2018-01-24 09:00:05 -08:00
Johannes Thumshirn
3124b65dad bsg: use pr_debug instead of hand crafted macros
Use pr_debug instead of hand crafted macros. This way it is not needed to
re-compile the kernel to enable bsg debug outputs and it's possible to
selectively enable specific prints.

Cc: Joe Perches <joe@perches.com>
Reviewed-by: Bart Van Assche <bart.vanassche@wdc.com>
Signed-off-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2018-01-24 09:50:06 -07:00
David Hildenbrand
8d5fb0dc4e KVM: s390: introduce and use kvm_s390_test_cpuflags()
Use it just like kvm_s390_set_cpuflags() and kvm_s390_clear_cpuflags().

Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20180123170531.13687-5-david@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
2018-01-24 17:46:42 +01:00
David Hildenbrand
9daecfc660 KVM: s390: introduce and use kvm_s390_clear_cpuflags()
Use it just like kvm_s390_set_cpuflags().

Suggested-by: Cornelia Huck <cohuck@redhat.com>
Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20180123170531.13687-4-david@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
2018-01-24 17:46:42 +01:00
David Hildenbrand
ef8f4f49fc KVM: s390: reuse kvm_s390_set_cpuflags()
Use it in all places where we set cpuflags.

Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20180123170531.13687-3-david@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
2018-01-24 17:46:41 +01:00
David Hildenbrand
2018224df3 KVM: s390: rename __set_cpuflag() to kvm_s390_set_cpuflags()
No need to make this function special. Move it to a header right away.

Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20180123170531.13687-2-david@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
2018-01-24 17:46:41 +01:00
Eryu Guan
6b136a24b0 blk-mq-debugfs: don't allow write on attributes with seq_operations set
Attributes that only implement .seq_ops are read-only, any write to
them should be rejected. But currently kernel would crash when
writing to such debugfs entries, e.g.

chmod +w /sys/kernel/debug/block/<dev>/requeue_list
echo 0 > /sys/kernel/debug/block/<dev>/requeue_list
chmod -w /sys/kernel/debug/block/<dev>/requeue_list

Fix it by returning -EPERM in blk_mq_debugfs_write() when writing to
such attributes.

Cc: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Eryu Guan <eguan@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2018-01-24 09:46:09 -07:00
Kuninori Morimoto
72c3818411
ASoC: soc-pcm: rename .pmdown_time to .use_pmdown_time for Component
commit fbb16563c6 ("ASoC: snd_soc_component_driver has pmdown_time")
added new .pmdown_time which is for inverted version of current
.ignore_pmdown_time
But it is confusable name. Let's rename it to .use_pmdown_time

Reported-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2018-01-24 16:44:22 +00:00
Arend Van Spriel
b69c1df472 brcmfmac: separate firmware errors from i/o errors
When using the firmware api it can fail simply because firmware does
not like the request or it fails due to issues in the host interface.
Currently, there is only a single error code which is confusing. So
adding a parameter to pass the firmware error separately and in case
of a firmware error always return -EBADE to user-space.

Reviewed-by: Hante Meuleman <hante.meuleman@broadcom.com>
Reviewed-by: Pieter-Paul Giesberts <pieter-paul.giesberts@broadcom.com>
Reviewed-by: Franky Lin <franky.lin@broadcom.com>
Signed-off-by: Arend van Spriel <arend.vanspriel@broadcom.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
2018-01-24 18:02:39 +02:00
Arend Van Spriel
5242a5444e brcmfmac: assure bcdc dcmd api does not return value > 0
The protocol layer api defines callbacks for dongle commands.
Although not really well documented these should only return an
error code in case of an error, or 0 upon success. In the bcdc
protocol it can return value above 0 and we carry a fix in the
caller of the protocol layer api. This patch makes it adhere to
the intent of the api as described above.

Reviewed-by: Hante Meuleman <hante.meuleman@broadcom.com>
Reviewed-by: Pieter-Paul Giesberts <pieter-paul.giesberts@broadcom.com>
Reviewed-by: Franky Lin <franky.lin@broadcom.com>
Signed-off-by: Arend van Spriel <arend.vanspriel@broadcom.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
2018-01-24 18:02:38 +02:00
Sergey Matyukevich
c93fe71c91 qtnfmac: remove redundant 'unlikely' checks
Signed-off-by: Sergey Matyukevich <sergey.matyukevich.os@quantenna.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
2018-01-24 18:01:02 +02:00
Igor Mitsyanko
237d29f6ce qtnfmac: do not use bus mutex for events processing
Events processing requires locking of bus mutex, which is also used by
cfg80211 layer before calling several of cfg80211 callbacks. Since all
cfg80211 callbacks in qtnfmac driver also lock bus mutex, this
potentially may lead to a deadlock.

Do not use bus lock for event processing. Use RTNL lock instead to
serialize events and commands processing threads.

Signed-off-by: Igor Mitsyanko <igor.mitsyanko.os@quantenna.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
2018-01-24 18:00:55 +02:00
Igor Mitsyanko
f2cddd5469 qtnfmac: do not use mutexes in timer context
The function qtnf_scan_done makes use of mutexes which is wrong
since it may be called from timer context. Move scan timeout
handler from timer to deferred work.

Signed-off-by: Igor Mitsyanko <igor.mitsyanko.os@quantenna.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
2018-01-24 18:00:54 +02:00
Sergey Matyukevich
39845020b3 qtnfmac: fix STA disconnect procedure
STA does not reconnect to the same AP after disconnect. The reason is
that STA is marked as disconnected in cfg80211 disconnect callback.
This is too early since in this case qtnfmac event handler skips
cfg80211_disconnected call when processing disconnect event from
the card. As a result, wdev is left in an inconsistent state.

Signed-off-by: Sergey Matyukevich <sergey.matyukevich.os@quantenna.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
2018-01-24 18:00:50 +02:00
Sergey Matyukevich
01efff5262 qtnfmac: validate interface combinations on changes
Validate new interface combinations using wireless core checks when new
interface is added or when the type of existing interface is modified.
This is performed to make sure that new interface combination is supported
by hardware. As a result, invalid interface combinations are rejected early,
rather than passed to hardware with sometimes unpredictable results.

Signed-off-by: Sergey Matyukevich <sergey.matyukevich.os@quantenna.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
2018-01-24 18:00:45 +02:00
Sergey Matyukevich
537faf269d qtnfmac: modify supported interface combinations
Update existing code handling configuration of supported interface
combinations. Current implementation is not complete since it does
not report multiple interface combinations which are incompatible
with each other. Instead current implementation packs all the
supported combinations into single entry.

In fact currently qsr10g wireless card supports the following
two distinct interface combinations:

1. STA/repeater: 1 STA and/or 1 AP
   {
     { .max = 1, .types = NL80211_IFTYPE_AP},
     { .max = 1, .types = NL80211_IFTYPE_STA},
   }

2. AP/mBSS
   {
     { .max = 8, .types = NL80211_IFTYPE_AP},
   }

The list of supported configuration is reported by firmware during
wireless card bring-up. Communication protocol between firmware
and host has been updated accordingly in order to accommodate passing
multiple interface combination entries.

Signed-off-by: Sergey Matyukevich <sergey.matyukevich.os@quantenna.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
2018-01-24 18:00:40 +02:00
Vasily Ulyanov
0b419d0182 qtnfmac: report hardware/firmware information via ethtool
Enable reporting of qtnfmac hardware and firmware details
using ethtool command.

Signed-off-by: Vasily Ulyanov <vulyanov@quantenna.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
2018-01-24 18:00:34 +02:00
Vasily Ulyanov
5ec5b532da qtnfmac: get more hardware info from card
Various bits of hardware and firmware versions are useful for debug
and troubleshooting. Get more information from the wireless card.

Signed-off-by: Vasily Ulyanov <vulyanov@quantenna.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
2018-01-24 18:00:33 +02:00
Vasily Ulyanov
04b01affb8 qtnfmac: support 64-bit network interface stats
On 32-bit platforms packet counters are stored in a net_device_stats struct
as unsigned long integers. As a result, after some time of network activity
an overflow takes place in network packet counters. This patch makes use of
new structs for holding interface statistics.

Signed-off-by: Vasily Ulyanov <vulyanov@quantenna.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
2018-01-24 18:00:30 +02:00
Vasily Ulyanov
87affddef9 qtnfmac: fix warnings when mBSS setup is stopped
Virtual interface should be deleted after calling unregister_netdevice
since this function ends up with sending updown_intf command to card.

Signed-off-by: Vasily Ulyanov <vulyanov@quantenna.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
2018-01-24 18:00:26 +02:00
Vasily Ulyanov
33f9899234 qtnfmac: remove struct qlink_cmd_set_mac_acl
TLV is used to pass ACL data to firmware in start_ap cfg80211 callback.
Use the same approach in set_mac_acl cfg80211 callback.

Signed-off-by: Vasily Ulyanov <vulyanov@quantenna.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
2018-01-24 18:00:25 +02:00
Yuval Mintz
1ecdaea02c mlxsw: spectrum_router: Don't log an error on missing neighbor
Driver periodically samples all neighbors configured in device
in order to update the kernel regarding their state. When finding
an entry configured in HW that doesn't show in neigh_lookup()
driver logs an error message.
This introduces a race when removing multiple neighbors -
it's possible that a given entry would still be configured in HW
as its removal is still being processed but is already removed
from the kernel's neighbor tables.

Simply remove the error message and gracefully accept such events.

Fixes: c723c735fa ("mlxsw: spectrum_router: Periodically update the kernel's neigh table")
Fixes: 60f040ca11 ("mlxsw: spectrum_router: Periodically dump active IPv6 neighbours")
Signed-off-by: Yuval Mintz <yuvalm@mellanox.com>
Reviewed-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-01-24 10:58:22 -05:00
David S. Miller
969ade4086 Merge branch 'cxgb4-fix-build-error'
Rahul Lakkireddy says:

====================
cxgb4: fix build error

Patch 1 fixes build error with compiling cudbg_zlib.c when
CONFIG_ZLIB_DEFLATE macro is not defined.

Patch 2 fixes following sparse warning:
"Using plain integer as NULL pointer"
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2018-01-24 10:56:59 -05:00
Rahul Lakkireddy
325694e6c3 cxgb4: properly initialize variables
memset variables to 0 to fix sparse warnings:

drivers/net/ethernet/chelsio/cxgb4/cxgb4_cudbg.c:409:42: sparse: Using
plain integer as NULL pointer

drivers/net/ethernet/chelsio/cxgb4/cudbg_zlib.c:43:47: sparse: Using
plain integer as NULL pointer

Fixes: ad75b7d32f ("cxgb4: implement ethtool dump data operations")
Fixes: 91c1953de3 ("cxgb4: use zlib deflate to compress firmware dump")
Signed-off-by: Rahul Lakkireddy <rahul.lakkireddy@chelsio.com>
Signed-off-by: Ganesh Goudar <ganeshgr@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-01-24 10:56:59 -05:00
Rahul Lakkireddy
a1cf9c9ffe cxgb4: enable ZLIB_DEFLATE when building cxgb4
Fixes:
drivers/net/ethernet/chelsio/cxgb4/cudbg_zlib.c:39:5: error:
redefinition of 'cudbg_compress_buff'
    int cudbg_compress_buff(struct cudbg_init *pdbg_init,
        ^~~~~~~~~~~~~~~~~~~
   In file included from
drivers/net/ethernet/chelsio/cxgb4/cudbg_zlib.c:23:0:
   drivers/net/ethernet/chelsio/cxgb4/cudbg_zlib.h:45:19: note: previous
definition of 'cudbg_compress_buff' was here
    static inline int cudbg_compress_buff(struct cudbg_init *pdbg_init,
                      ^~~~~~~~~~~~~~~~~~~

Fixes: 91c1953de3 ("cxgb4: use zlib deflate to compress firmware dump")
Signed-off-by: Rahul Lakkireddy <rahul.lakkireddy@chelsio.com>
Signed-off-by: Ganesh Goudar <ganeshgr@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-01-24 10:56:59 -05:00
David S. Miller
9e1a27cdab Merge branch 'net-smc-socket-closing-improvements'
Ursula Braun says:

====================
net/smc: socket closing improvements

while the first 2 patches are just small cleanups, the remaing
patches affect socket closing.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2018-01-24 10:52:58 -05:00
Ursula Braun
aa377e682d net/smc: continue waiting if peer signals write_shutdown
If the peer sends a shutdown WRITE, this should not affect sending
in general, and waiting for send buffer space in particular.
Stop waiting of the local socket for send buffer space only, if peer
signals closing, but not if peer signals just shutdown WRITE.

Signed-off-by: Ursula Braun <ubraun@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-01-24 10:52:57 -05:00
Ursula Braun
bbb96bf236 net/smc: improve state change handling after close wait
When a socket is closed or shutdown, smc waits for data being transmitted
in certain states. If the state changes during this wait, the close
switch depending on state should be reentered.
In addition, state change is avoided if sending of close or shutdown fails.

Signed-off-by: Ursula Braun <ubraun@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-01-24 10:52:57 -05:00
Ursula Braun
86e780d3a3 net/smc: make wait for work request uninterruptible
Work requests are needed for every ib_post_send(), among them the
ib_post_send() to signal closing. If an smc socket program is cancelled,
the smc connections should be cleaned up, and require sending of closing
signals to the peer. This may fail, if a wait for
a free work request is needed, but is cancelled immediately due to the
cancel interrupt. To guarantee notification of the peer, the wait for
a work request is changed to uninterruptible.

And the area to receive work request completion info with
ib_poll_cq() is cleared first.
And _tx_ variable names are used in the _tx_routines for the
demultiplexing common type in the header.

Signed-off-by: Ursula Braun <ubraun@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-01-24 10:52:57 -05:00
Ursula Braun
8429c13435 net/smc: get rid of tx_pend waits in socket closing
There is no need to wait for confirmation of pending tx requests
for a closing connection, since pending tx slots are dismissed
when finishing a connection.

Signed-off-by: Ursula Braun <ubraun@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-01-24 10:52:57 -05:00
Ursula Braun
35a6b17847 net/smc: simplify function smc_clcsock_accept()
Cleanup to avoid duplicate code in smc_clcsock_accept().
No functional change.

Signed-off-by: Ursula Braun <ubraun@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-01-24 10:52:57 -05:00