The loop to find the best memory frame in arch_timer_mem_acpi_init()
initializes the loop counter with itself ('i = i'), which is suspicious
in the first place and pointed out by clang. The loop condition is
'i < timer_count' and a prior for loop exits when 'i' reaches
'timer_count', therefore the second loop is never executed.

Initialize the loop counter with 0 to iterate over all timers, which
supposedly was the intention before the typo monster attacked.

Fixes: c2743a36 ("clocksource: arm_arch_timer: add GTDT support for memory-mapped timer")
Signed-off-by: Matthias Kaehlcke <mka@chromium.org>
Reported-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>

For e.g. HZ=100, timer being 430 jiffies in the future, and 32 bit
unsigned int, there is an overflow on unsigned int right-hand side
of the expression which results with wrong values being returned.

Type cast the multiplier to 64bit to avoid that issue.

Fixes: 46c8f0b0 ("timers: Fix get_next_timer_interrupt() computation")
Signed-off-by: Matija Glavinic Pecotic <matija.glavinic-pecotic.ext@nokia.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Alexander Sverdlin <alexander.sverdlin@nokia.com>
Cc: khilman@baylibre.com
Cc: akpm@linux-foundation.org
Cc: stable@vger.kernel.org
Link: http://lkml.kernel.org/r/a7900f04-2a21-c9fd-67be-ab334d459ee5@nokia.com

Pull x86 fixes from Thomas Gleixner:
 "A small set of x86 fixes:

   - prevent the kernel from using the EFI reboot method when EFI is
     disabled.

   - two patches addressing clang issues"

* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/boot: Disable the address-of-packed-member compiler warning
  x86/efi: Fix reboot_mode when EFI runtime services are disabled
  x86/boot: #undef memcpy() et al in string.c

Pull scheduler fixes from Thomas Gleixner:
 "Two patches addressing build warnings caused by inconsistent kernel
  doc comments"

* 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  sched/wait: Clean up some documentation warnings
  sched/core: Fix some documentation build warnings

Pull perf fixes from Thomas Gleixner:
 "A couple of fixes for performance counters and kprobes:

   - a series of small patches which make the uncore performance
     counters on Skylake server systems work correctly

   - add a missing instruction slot release to the failure path of
     kprobes"

* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  kprobes/x86: Release insn_slot in failure path
  perf/x86/intel/uncore: Fix missing marker for skx_uncore_cha_extra_regs
  perf/x86/intel/uncore: Fix SKX CHA event extra regs
  perf/x86/intel/uncore: Remove invalid Skylake server CHA filter field
  perf/x86/intel/uncore: Fix Skylake server CHA LLC_LOOKUP event umask
  perf/x86/intel/uncore: Fix Skylake server PCU PMU event format
  perf/x86/intel/uncore: Fix Skylake UPI PMU event masks

Pull irq fix from Thomas Gleixner:
 "Fix for a regression caused by the conversion of x86 to the generic
  hotplug code.

  Instead of doing a plain single line revert, this adds a pile of
  comments so the semantics of the force argument are clear"

* 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  genirq/cpuhotplug: Revert "Set force affinity flag on hotplug migration"

Pull DeviceTree fixes from Rob Herring:
 "Two small DT fixes:

   - Fix error handling in of_irq_to_resource_table() due to
     of_irq_to_resource() error return changes.

   - Fix dtx_diff script due to dts include path changes"

* tag 'devicetree-fixes-for-4.13' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux:
  of: irq: fix of_irq_to_resource() error check
  scripts/dtc: dtx_diff - update include dts paths to match build

Pull NFS client fixes from Anna Schumaker:
 "More NFS client bugfixes for 4.13.

  Most of these fix locking bugs that Ben and Neil noticed, but I also
  have a patch to fix one more access bug that was reported after last
  week.

  Stable fixes:
   - Fix a race where CB_NOTIFY_LOCK fails to wake a waiter
   - Invalidate file size when taking a lock to prevent corruption

  Other fixes:
   - Don't excessively generate tiny writes with fallocate
   - Use the raw NFS access mask in nfs4_opendata_access()"

* tag 'nfs-for-4.13-3' of git://git.linux-nfs.org/projects/anna/linux-nfs:
  NFSv4.1: Fix a race where CB_NOTIFY_LOCK fails to wake a waiter
  NFS: Optimize fallocate by refreshing mapping when needed.
  NFS: invalidate file size when taking a lock.
  NFS: Use raw NFS access mask in nfs4_opendata_access()

Pull xfs fixes from Darrick Wong:

 - fix firstfsb variables that we left uninitialized, which could lead
   to locking problems.

 - check for NULL metadata buffer pointers before using them.

 - don't allow btree cursor manipulation if the btree block is corrupt.
   Better to just shut down.

 - fix infinite loop problems in quotacheck.

 - fix buffer overrun when validating directory blocks.

 - fix deadlock problem in bunmapi.

* tag 'xfs-4.13-fixes-2' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux:
  xfs: fix multi-AG deadlock in xfs_bunmapi
  xfs: check that dir block entries don't off the end of the buffer
  xfs: fix quotacheck dquot id overflow infinite loop
  xfs: check _alloc_read_agf buffer pointer before using
  xfs: set firstfsb to NULLFSBLOCK before feeding it to _bmapi_write
  xfs: check _btree_check_block value

Pull KVM fixes from Paolo Bonzini:
 "s390:
   - SRCU fix

  PPC:
   - host crash fixes

  x86:
   - bugfixes, including making nested posted interrupts really work

  Generic:
   - tweaks to kvm_stat and to uevents"

* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
  KVM: LAPIC: Fix reentrancy issues with preempt notifiers
  tools/kvm_stat: add '-f help' to get the available event list
  tools/kvm_stat: use variables instead of hard paths in help output
  KVM: nVMX: Fix loss of L2's NMI blocking state
  KVM: nVMX: Fix posted intr delivery when vcpu is in guest mode
  x86: irq: Define a global vector for nested posted interrupts
  KVM: x86: do mask out upper bits of PAE CR3
  KVM: make pid available for uevents without debugfs
  KVM: s390: take srcu lock when getting/setting storage keys
  KVM: VMX: remove unused field
  KVM: PPC: Book3S HV: Fix host crash on changing HPT size
  KVM: PPC: Book3S HV: Enable TM before accessing TM registers

Pull xen fixes from Juergen Gross:
 "Three minor cleanups for xen related drivers"

* tag 'for-linus-4.13b-rc3-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
  xen: dont fiddle with event channel masking in suspend/resume
  xen: selfballoon: remove unnecessary static in frontswap_selfshrink()
  xen: Drop un-informative message during boot

Pull arm64 fixes from Will Deacon:
 "I'd been collecting these whilst we debugged a CPU hotplug failure,
  but we ended up diagnosing that one to tglx, who has taken a fix via
  the -tip tree separately.

  We're seeing some NFS issues that we haven't gotten to the bottom of
  yet, and we've uncovered some issues with our backtracing too so there
  might be another fixes pull before we're done.

  Summary:

   - Ensure we have a guard page after the kernel image in vmalloc

   - Fix incorrect prefetch stride in copy_page

   - Ensure irqs are disabled in die()

   - Fix for event group validation in QCOM L2 PMU driver

   - Fix requesting of PMU IRQs on AMD Seattle

   - Minor cleanups and fixes"

* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
  arm64: mmu: Place guard page after mapping of kernel image
  drivers/perf: arm_pmu: Request PMU SPIs with IRQF_PER_CPU
  arm64: sysreg: Fix unprotected macro argmuent in write_sysreg
  perf: qcom_l2: fix column exclusion check
  arm64/lib: copy_page: use consistent prefetch stride
  arm64/numa: Drop duplicate message
  perf: Convert to using %pOF instead of full_name
  arm64: Convert to using %pOF instead of full_name
  arm64: traps: disable irq in die()
  arm64: atomics: Remove '&' from '+&' asm constraint in lse atomics
  arm64: uaccess: Remove redundant __force from addr cast in __range_ok

Pull powerpc fixes from Michael Ellerman:
 "The highlight is Ben's patch to work around a host killing bug when
  running KVM guests with the Radix MMU on Power9. See the long change
  log of that commit for more detail.

  And then three fairly minor fixes:

   - fix of_node_put() underflow during reconfig remove, using old DLPAR
     tools.

   - fix recently introduced ld version check with 64-bit LE-only
     toolchain.

   - free the subpage_prot_table correctly, avoiding a memory leak.

  Thanks to: Aneesh Kumar K.V, Benjamin Herrenschmidt, Laurent Vivier"

* tag 'powerpc-4.13-4' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
  powerpc/mm/hash: Free the subpage_prot_table correctly
  powerpc/Makefile: Fix ld version check with 64-bit LE-only toolchain
  powerpc/pseries: Fix of_node_put() underflow during reconfig remove
  powerpc/mm/radix: Workaround prefetch issue with KVM

nfs4_retry_setlk() sets the task's state to TASK_INTERRUPTIBLE within the
same region protected by the wait_queue's lock after checking for a
notification from CB_NOTIFY_LOCK callback.  However, after releasing that
lock, a wakeup for that task may race in before the call to
freezable_schedule_timeout_interruptible() and set TASK_WAKING, then
freezable_schedule_timeout_interruptible() will set the state back to
TASK_INTERRUPTIBLE before the task will sleep.  The result is that the task
will sleep for the entire duration of the timeout.

Since we've already set TASK_INTERRUPTIBLE in the locked section, just use
freezable_schedule_timout() instead.

Fixes: a1d617d8 ("nfs: allow blocking locks to be awoken by lock callbacks")
Signed-off-by: Benjamin Coddington <bcodding@redhat.com>
Reviewed-by: Jeff Layton <jlayton@redhat.com>
Cc: stable@vger.kernel.org # v4.9+
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>

Pull crypto fixes from Herbert Xu:

 - remove broken dt bindings in inside-secure

 - fix authencesn crash when used with digest_null

 - fix cavium/nitrox firmware path

 - fix SHA3 failure in brcm

 - fix Kconfig dependency for brcm

* 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6:
  crypto: authencesn - Fix digest_null crash
  crypto: brcm - remove BCM_PDC_MBOX dependency in Kconfig
  Documentation/bindings: crypto: remove the dma-mask property
  crypto: inside-secure - do not parse the dma mask from dt
  crypto: cavium/nitrox - Change in firmware path.
  crypto: brcm - Fix SHA3-512 algorithm failure

Pull btrfs fixes from David Sterba:
 "Fixes addressing problems reported by users, and there's one more
  regression fix"

* 'for-4.13-part3' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux:
  btrfs: round down size diff when shrinking/growing device
  Btrfs: fix early ENOSPC due to delalloc
  btrfs: fix lockup in find_free_extent with read-only block groups
  Btrfs: fix dir item validation when replaying xattr deletes

Pull MD fixes from Shaohua Li:
 "This fixes several bugs, three of them are marked for stable:

   - an initialization issue fixed by Ming

   - a bio clone race issue fixed by me

   - an async tx flush issue fixed by Ofer

   - other cleanups"

* 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/shli/md:
  MD: fix warnning for UP case
  md/raid5: add thread_group worker async_tx_issue_pending_all
  md: simplify code with bio_io_error
  md/raid1: fix writebehind bio clone
  md: raid1-10: move raid1/raid10 common code into raid1-10.c
  md: raid1/raid10: initialize bvec table via bio_add_page()
  md: remove 'idx' from 'struct resync_pages'

Merge tag 'for-4.13/dm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm

Pull device mapper fixes from Mike Snitzer:

 - a few DM integrity fixes that improve performance. One that address
   inefficiencies in the on-disk journal device layout. Another that
   makes use of the block layer's on-stack plugging when writing the
   journal.

 - a dm-bufio fix for the blk_status_t conversion that went in during
   the merge window.

 - a few DM raid fixes that address correctness when suspending the
   device and a validation fix for validation that occurs during device
   activation.

 - a couple DM zoned target fixes. Important one being the fix to not
   use GFP_KERNEL in the IO path due to concerns about deadlock in
   low-memory conditions (e.g. swap over a DM zoned device, etc).

 - a DM DAX device fix to make sure dm_dax_flush() is called if the
   underlying DAX device is operating as a write cache.

* tag 'for-4.13/dm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm:
  dm, dax: Make sure dm_dax_flush() is called if device supports it
  dm verity fec: fix GFP flags used with mempool_alloc()
  dm zoned: use GFP_NOIO in I/O path
  dm zoned: remove test for impossible REQ_OP_FLUSH conditions
  dm raid: bump target version
  dm raid: avoid mddev->suspended access
  dm raid: fix activation check in validate_raid_redundancy()
  dm raid: remove WARN_ON() in raid10_md_layout_to_format()
  dm bufio: fix error code in dm_bufio_write_dirty_buffers()
  dm integrity: test for corrupted disk format during table load
  dm integrity: WARN_ON if variables representing journal usage get out of sync
  dm integrity: use plugging when writing the journal
  dm integrity: fix inefficient allocation of journal space

Pull block fixes from Jens Axboe:
 "A small collection of fixes that should go into this series. This
  contains:

   - NVMe pull request from Christoph, with various fixes for nvme
     proper and nvme-fc.

   - disable runtime PM for blk-mq for now.

     With scsi now defaulting to using blk-mq, this reared its head as
     an issue. Longer term we'll fix up runtime PM for blk-mq, for now
     just disable it to prevent a hang on laptop resume for some folks.

   - blk-mq CPU <-> hw queue map fix from Christoph.

   - xen/blkfront pull request from Konrad, with two small fixes for the
     blkfront driver.

   - a few fixups for nbd from Joseph.

   - a stable fix for pblk from Javier"

* 'for-linus' of git://git.kernel.dk/linux-block:
  lightnvm: pblk: advance bio according to lba index
  nvme: validate admin queue before unquiesce
  nbd: clear disconnected on reconnect
  nvme-pci: fix HMB size calculation
  nvme-fc: revise TRADDR parsing
  nvme-fc: address target disconnect race conditions in fcp io submit
  nvme: fabrics commands should use the fctype field for data direction
  nvme: also provide a UUID in the WWID sysfs attribute
  xen/blkfront: always allocate grants first from per-queue persistent grants
  xen-blkfront: fix mq start/stop race
  blk-mq: map queues to all present CPUs
  block: disable runtime-pm for blk-mq
  xen-blkfront: Fix handling of non-supported operations
  nbd: only set sndtimeo if we have a timeout set
  nbd: take tx_lock before disconnecting
  nbd: allow multiple disconnects to be sent

Pull MMC fixes from Ulf Hansson:
 "Here are a couple of mmc fixes intended for v4.13-rc1.

  I have also included a couple of cleanup patches in this pull request
  for OMAP2+, related to the omap_hsmmc driver. The reason is because of
  the changes are also depending on OMAP SoC specific code, so this
  simplifies how to deal with this.

  Summary:

  MMC host:
   - sunxi: Correct time phase settings
   - omap_hsmmc: Clean up some dead code
   - dw_mmc: Fix message printed for deprecated num-slots DT binding
   - dw_mmc: Fix DT documentation"

* tag 'mmc-v4.13-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc:
  Documentation: dw-mshc: deprecate num-slots
  mmc: dw_mmc: fix the wrong condition check of getting num-slots from DT
  mmc: host: omap_hsmmc: remove unused platform callbacks
  ARM: OMAP2+: hsmmc.c: Remove dead code
  mmc: sunxi: Keep default timing phase settings for new timing mode

When a lba either hits the cache or corresponds to an empty entry in the
L2P table, we need to advance the bio according to the position in which
the lba is located. Otherwise, we will copy data in the wrong page, thus
causing data corruption for the application.

In case of a cache hit, we assumed that bio->bi_iter.bi_idx would
contain the correct index, but this is no necessarily true. Instead, use
the local bio advance counter and iterator. This guarantees that lbas
hitting the cache are copied into the right bv_page.

In case of an empty L2P entry, we omitted to advance the bio. In the
cases when the same I/O also contains a cache hit, data corresponding
to this lba will be copied to the wrong bv_page. Fix this by advancing
the bio as we do in the case of a cache hit.

Fixes: a4bd217b lightnvm: physical block device (pblk) target
Signed-off-by: Javier González <javier@javigon.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

The vast majority of virtual allocations in the vmalloc region are followed
by a guard page, which can help to avoid overruning on vma into another,
which may map a read-sensitive device.

This patch adds a guard page to the end of the kernel image mapping (i.e.
following the data/bss segments).

Cc: Mark Rutland <mark.rutland@arm.com>
Reviewed-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>

The clang warning 'address-of-packed-member' is disabled for the general
kernel code, also disable it for the x86 boot code.

This suppresses a bunch of warnings like this when building with clang:

./arch/x86/include/asm/processor.h:535:30: warning: taking address of
  packed member 'sp0' of class or structure 'x86_hw_tss' may result in an
  unaligned pointer value [-Waddress-of-packed-member]
    return this_cpu_read_stable(cpu_tss.x86_tss.sp0);
                                ^~~~~~~~~~~~~~~~~~~
./arch/x86/include/asm/percpu.h:391:59: note: expanded from macro
  'this_cpu_read_stable'
    #define this_cpu_read_stable(var)       percpu_stable_op("mov", var)
                                                                    ^~~
./arch/x86/include/asm/percpu.h:228:16: note: expanded from macro
  'percpu_stable_op'
    : "p" (&(var)));
             ^~~
Signed-off-by: Matthias Kaehlcke <mka@chromium.org>
Cc: Doug Anderson <dianders@chromium.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Masahiro Yamada <yamada.masahiro@socionext.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/20170725215053.135586-1-mka@chromium.orgSigned-off-by: Ingo Molnar <mingo@kernel.org>

Pull drm fixes from Dave Airlie:
 "These iare the fixes for 4.13-rc3: vmwgfx, exynos, i915, amdgpu,
  nouveau, host1x and displayport fixes.

  As expected people woke up this week, i915 didn't do an -rc2 pull so
  got a bumper -rc3 pull, and Ben resurfaced on nouveau and fixed a
  bunch of major crashers seen on Fedora 26, and there are a few vmwgfx
  fixes as well.

  Otherwise exynos had some regression fixes/cleanups, and amdgpu has an
  rcu locking regression fix and a couple of minor fixes"

* tag 'drm-fixes-for-v4.13-rc3' of git://people.freedesktop.org/~airlied/linux: (44 commits)
  drm/i915: Fix bad comparison in skl_compute_plane_wm.
  drm/i915: Force CPU synchronisation even if userspace requests ASYNC
  drm/i915: Only skip updating execobject.offset after error
  drm/i915: Only mark the execobject as pinned on success
  drm/i915: Remove assertion from raw __i915_vma_unpin()
  drm/i915/cnl: Fix loadgen select programming on ddi vswing sequence
  drm/i915: Fix scaler init during CRTC HW state readout
  drm/i915/selftests: Fix an error handling path in 'mock_gem_device()'
  drm/i915: Unbreak gpu reset vs. modeset locking
  gpu: host1x: Free the IOMMU domain when there is no device to attach
  drm/i915: Fix cursor updates on some platforms
  drm/i915: Fix user ptr check size in eb_relocate_vma()
  drm: exynos: mark pm functions as __maybe_unused
  drm/exynos: select CEC_CORE if CEC_NOTIFIER
  drm/exynos/hdmi: fix disable sequence
  drm/exynos: mic: add a bridge at probe
  drm/exynos/dsi: Remove error handling for bridge_node DT parsing
  drm/exynos: dsi: do not try to find bridge
  drm: exynos: hdmi: make of_device_ids const.
  drm: exynos: constify mixer_match_types and *_mxr_drv_data.
  ...

Merge tag 'exynos-drm-fixes-for-v4.13-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/daeinki/drm-exynos into drm-fixes

Summary:
- fix probing fail issue of dsi driver without bridge device.
- fix disable sequence of hdmi driver.
- trivial cleanups.

* tag 'exynos-drm-fixes-for-v4.13-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/daeinki/drm-exynos:
  drm: exynos: mark pm functions as __maybe_unused
  drm/exynos: select CEC_CORE if CEC_NOTIFIER
  drm/exynos/hdmi: fix disable sequence
  drm/exynos: mic: add a bridge at probe
  drm/exynos/dsi: Remove error handling for bridge_node DT parsing
  drm/exynos: dsi: do not try to find bridge
  drm: exynos: hdmi: make of_device_ids const.
  drm: exynos: constify mixer_match_types and *_mxr_drv_data.
  exynos_drm: Clean up duplicated assignment in exynos_drm_driver

Merge tag 'drm-intel-fixes-2017-07-27' of git://anongit.freedesktop.org/git/drm-intel into drm-fixes

i915 fixes for -rc3

Bit more than usual since we missed -rc2. 4x cc: stable, 2 gvt
patches, but all fairly minor stuff. Last minute rebase was to add a
few missing cc: stable, I did prep the pull this morning already and
made sure CI approves.

* tag 'drm-intel-fixes-2017-07-27' of git://anongit.freedesktop.org/git/drm-intel:
  drm/i915: Fix bad comparison in skl_compute_plane_wm.
  drm/i915: Force CPU synchronisation even if userspace requests ASYNC
  drm/i915: Only skip updating execobject.offset after error
  drm/i915: Only mark the execobject as pinned on success
  drm/i915: Remove assertion from raw __i915_vma_unpin()
  drm/i915/cnl: Fix loadgen select programming on ddi vswing sequence
  drm/i915: Fix scaler init during CRTC HW state readout
  drm/i915/selftests: Fix an error handling path in 'mock_gem_device()'
  drm/i915: Unbreak gpu reset vs. modeset locking
  drm/i915: Fix cursor updates on some platforms
  drm/i915: Fix user ptr check size in eb_relocate_vma()
  drm/i915/gvt: Extend KBL platform support in GVT-g
  drm/i915/gvt: Fix the vblank timer close issue after shutdown VMs in reverse

Core Changes:
- dp: A few fixes in drm_dp_downstream_debug() (Chris)
- rockchip: sanitize the Kconfig dependencies (fallout from EXTCON) (Arnd)
- host1x: Free the iommu domain when attach_device fails (Paul)

Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Paul Kocialkowski <contact@paulk.fr>

* tag 'drm-misc-fixes-2017-07-27' of git://anongit.freedesktop.org/git/drm-misc:
  gpu: host1x: Free the IOMMU domain when there is no device to attach
  drm/rockchip: fix Kconfig dependencies
  drm/dp: Don't trust drm_dp_downstream_id()
  drm/dp: Fix read pointer for drm_dp_downsteam_debug()

Pull ACPI fixes from Rafael Wysocki:
 "These are two fixups for the suspend-to-idle handling in the ACPI
  subsystem after recent changes in that area and two simple fixes of
  the ACPI NUMA code.

  Specifics:

   - Add an ACPI module parameter to allow users to override the new
     default behavior on some systems where the EC GPE is not disabled
     during suspend-to-idle in case the EC on their systems generates
     excessive wakeup events and they want to sacrifice some
     functionality (like power button wakeups) for extra battery life
     while suspended (Rafael Wysocki).

   - Fix flushing of the outstanding EC work in the ACPI core
     suspend-to-idle code (Rafael Wysocki).

   - Add a missing include and fix a messed-up comment in the ACPI NUMA
     code (Ross Zwisler)"

* tag 'acpi-4.13-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  ACPI: NUMA: Fix typo in the full name of SRAT
  ACPI: NUMA: add missing include in acpi_numa.h
  ACPI / PM / EC: Flush all EC work in acpi_freeze_sync()
  ACPI / EC: Add parameter to force disable the GPE on suspend

* acpi-pm:
  ACPI / PM / EC: Flush all EC work in acpi_freeze_sync()
  ACPI / EC: Add parameter to force disable the GPE on suspend

* acpi-numa:
  ACPI: NUMA: Fix typo in the full name of SRAT
  ACPI: NUMA: add missing include in acpi_numa.h

gvt-fixes-2017-07-26

- Turn on KBL support for more SKUs (Jianjun)
- Fix vblank timer close bug (Fred)
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20170726075621.hrauvik62gi2jecj@zhen-hp.sh.intel.com

ddb_allocation && ddb_allocation / blocks_per_line >= 1 is the same
as ddb_allocation >= blocks_per_line, so use the latter to simplify
this.

This fixes the following compiler warning:

drivers/gpu/drm/i915/intel_pm.c:4467]: (warning) Comparison of a
boolean expression with an integer other than 0 or 1.
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Fixes: d555cb58 ("drm/i915/skl+: use linetime latency if ddb size is not available")
Cc: "Mahesh Kumar" <mahesh1.kumar@intel.com>
Reported-by: David Binderman <dcb314@hotmail.com>
Cc: David Binderman <dcb314@hotmail.com>
Cc: <drm-intel-fixes@lists.freedesktop.org> # v4.13-rc1+
Reviewed-by: Mahesh Kumar <mahesh1.kumar@intel.com>
(cherry picked from commit 54d20ed1)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20170717111355.4523-1-maarten.lankhorst@linux.intel.comSigned-off-by: Daniel Vetter <daniel.vetter@intel.com>

The goal here was to minimise doing any thing or any check inside the
kernel that was not strictly required. For a userspace that assumes
complete control over the cache domains, the kernel is usually using
outdated information and may trigger clflushes where none were
required.

However, swapping is a situation where userspace has no knowledge of the
domain transfer, and will leave the object in the CPU cache. The kernel
must flush this out to the backing storage prior to use with the GPU. As
we use an asynchronous task tracked by an implicit fence for this, we
also need to cancel the ASYNC flag on the object so that the object will
wait for the clflush to complete before being executed. This also absolves
userspace of the responsibility imposed by commit 77ae9957 ("drm/i915:
Enable userspace to opt-out of implicit fencing") that its needed to ensure
that the object was out of the CPU cache prior to use on the GPU.

Fixes: 77ae9957 ("drm/i915: Enable userspace to opt-out of implicit fencing")
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=101571Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Jason Ekstrand <jason@jlekstrand.net>
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
Link: https://patchwork.freedesktop.org/patch/msgid/20170721145037.25105-5-chris@chris-wilson.co.ukReviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
(cherry picked from commit 0f46daa1)
Cc: stable@vger.kernel.org
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

I was being overly paranoid in not updating the execobject.offset after
performing the fallback copy where we set reloc.presumed_offset to -1.
The thinking was to ensure that a subsequent NORELOC execbuf would be
forced to process the invalid relocations. However this is overkill so
long as we *only* update the execobject.offset following a successful
update of the relocation value witin the batch. If we have to repeat the
execbuf due to a later interruption, then we may skip the relocations on
the second pass (honouring NORELOC) since the execobject.offset match
the actual offsets (even though reloc.presumed_offset is garbage).

Subsequent calls to execbuf with NORELOC should themselves ensure that
the reloc.presumed_offset have been corrected in case of future
migration.

Reporting back the actual execobject.offset, even when
reloc.presumed_offset is garbage, ensures that reuse of those objects
use the latest information to avoid relocations.

Fixes: 2889caa9 ("drm/i915: Eliminate lots of iterations over the execobjects array")
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=101635Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20170721145037.25105-4-chris@chris-wilson.co.ukReviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
(cherry picked from commit 1f727d9e)
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

If we fail to acquire a fence (for old school fenced GPU access) then we
unwind the vma reservation, including its pin. However, we were making
the execobject as holding the pin before erring out, leading to a double
unpin:

[ 3193.991802] kernel BUG at drivers/gpu/drm/i915/i915_vma.h:287!
[ 3193.998131] invalid opcode: 0000 [#1] PREEMPT SMP
[ 3194.002816] Modules linked in: snd_hda_intel i915 vgem snd_hda_codec_analog snd_hda_codec_generic coretemp snd_hda_codec snd_hwdep snd_hda_core snd_pcm lpc_ich mei_me e1000e mei prime_numbers ptp pps_core [last unloaded: i915]
[ 3194.022841] CPU: 0 PID: 8123 Comm: kms_flip Tainted: G     U          4.13.0-rc1-CI-CI_DRM_471+ #1
[ 3194.031765] Hardware name: Dell Inc. OptiPlex 755                 /0PU052, BIOS A04 11/05/2007
[ 3194.040343] task: ffff8800785d4c40 task.stack: ffffc90001768000
[ 3194.046339] RIP: 0010:eb_release_vmas.isra.6+0x119/0x180 [i915]
[ 3194.052234] RSP: 0018:ffffc9000176ba80 EFLAGS: 00010246
[ 3194.057439] RAX: 00000000000003c0 RBX: ffff8800710fc2d8 RCX: ffff8800588e4f48
[ 3194.064546] RDX: ffffffff1fffffff RSI: 00000000ffffffff RDI: ffff8800588e00d0
[ 3194.071654] RBP: ffffc9000176bab0 R08: 0000000000000000 R09: 0000000000000000
[ 3194.078761] R10: 0000000000000040 R11: 0000000000000001 R12: ffff880060822f00
[ 3194.085867] R13: 0000000000000310 R14: 00000000000003b8 R15: ffffc9000176bbb0
[ 3194.092975] FS:  00007fd2b94aba40(0000) GS:ffff88007d200000(0000) knlGS:0000000000000000
[ 3194.101033] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 3194.106754] CR2: 00007ffbec3ff000 CR3: 0000000074e67000 CR4: 00000000000006f0
[ 3194.113861] Call Trace:
[ 3194.116321]  eb_relocate_slow+0x67/0x4e0 [i915]
[ 3194.120861]  i915_gem_do_execbuffer+0x429/0x1260 [i915]
[ 3194.126070]  ? lock_acquire+0xb5/0x210
[ 3194.129803]  ? __might_fault+0x39/0x90
[ 3194.133563]  i915_gem_execbuffer2+0x9b/0x1b0 [i915]
[ 3194.138447]  ? i915_gem_execbuffer+0x2b0/0x2b0 [i915]
[ 3194.143478]  drm_ioctl_kernel+0x64/0xb0
[ 3194.147298]  drm_ioctl+0x2cd/0x390
[ 3194.150710]  ? i915_gem_execbuffer+0x2b0/0x2b0 [i915]
[ 3194.155741]  ? finish_task_switch+0xa5/0x210
[ 3194.159993]  ? finish_task_switch+0x6a/0x210
[ 3194.164247]  do_vfs_ioctl+0x90/0x670
[ 3194.167806]  ? entry_SYSCALL_64_fastpath+0x5/0xb1
[ 3194.172492]  ? __this_cpu_preempt_check+0x13/0x20
[ 3194.177176]  ? trace_hardirqs_on_caller+0xe7/0x1c0
[ 3194.181946]  SyS_ioctl+0x3c/0x70
[ 3194.185159]  entry_SYSCALL_64_fastpath+0x1c/0xb1
[ 3194.189756] RIP: 0033:0x7fd2b76a8587
[ 3194.193314] RSP: 002b:00007fff074845b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[ 3194.200855] RAX: ffffffffffffffda RBX: ffffffff8146da43 RCX: 00007fd2b76a8587
[ 3194.207962] RDX: 00007fff074846e0 RSI: 0000000040406469 RDI: 0000000000000003
[ 3194.215068] RBP: ffffc9000176bf88 R08: 0000000000000000 R09: 0000000000000003
[ 3194.222175] R10: 00007fd2b796bb58 R11: 0000000000000246 R12: 00007fff07484880
[ 3194.229280] R13: 0000000000000003 R14: 0000000040406469 R15: 0000000000000000
[ 3194.236386]  ? __this_cpu_preempt_check+0x13/0x20
[ 3194.241070] Code: 24 b0 00 00 00 48 85 c9 0f 84 6c ff ff ff 8b 41 20 85 c0 7e 73 83 e8 01 89 41 20 41 8b 84 24 e8 00 00 00 a8 0f 0f 85 5f ff ff ff <0f> 0b 48 83 c4 08 5b 41 5c 41 5d 41 5e 41 5f 5d f3 c3 49 8b 84
[ 3194.259943] RIP: eb_release_vmas.isra.6+0x119/0x180 [i915] RSP: ffffc9000176ba80
[ 3194.268047] ---[ end trace 1d7348c6575d8800 ]---
[ 3673.658819] softdog: Initiating panic
[ 3673.662471] Kernel panic - not syncing: Software Watchdog Timer expired
[ 3673.669066] Kernel Offset: disabled
[ 3673.672541] Rebooting in 1 seconds..
Reported-by: Tomi Sarvela <tomi.p.sarvela@intel.com>
Fixes: 2889caa9 ("drm/i915: Eliminate lots of iterations over the execobjects array")
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20170721145037.25105-3-chris@chris-wilson.co.ukReviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
(cherry picked from commit 1da7b54c)
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

After we detect a i915_vma pin overflow, we call __i915_vma_unpin to
cleanup. However, on an overflow the pin_count bitfield will be zero,
triggering an assertion, even though we the intention is to merely warn
and report the error back to the user (as historically the culprit has
be a leak in the display code).

Fixes: 20dfbde4 ("drm/i915: Wrap vma->pin_count accessors with small inline helpers")
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20170721145037.25105-2-chris@chris-wilson.co.ukReviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
(cherry picked from commit 67fddd90)
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

The condition for setting the Loadgen Select bit of
PORT_TX_DW4 register during DDI Vswing Sequence should be
Bit rate <=6 GHz whereas the existing code checks only
Bit Rate < 6GHz. This patch fixes this condition.
While at it also remove the redundant paranthesis.

Fixes: cf54ca8b ("drm/i915/cnl: Implement voltage swing sequence.")
Cc: Paulo Zanoni <paulo.r.zanoni@intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Manasi Navare <manasi.d.navare@intel.com>
Reviewed-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/1500329122-32662-1-git-send-email-manasi.d.navare@intel.comSigned-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
(cherry picked from commit a8e45a1c)
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

The scaler allocation code depends on a non-zero default value for the
crtc scaler_id, so make sure we initialize the scaler state accordingly
even if the crtc is off. This fixes at least an initial YUV420 modeset
(added in a follow-up patchset by Shashank) when booting with the screen
off: after the initial HW readout and modeset which enables the scaler a
subsequent modeset will disable the scaler which isn't properly
allocated. This results in a funky HW state where the pipe scaler HW
registers can't be modified and the normally black screen is grey and
shifted to the right or jitters.

The problem was revealed by Shashank's YUV420 patchset and first
reported by Ville.

v2:
- In the stable tag also include versions which need backporting (Jani)

Cc: Jani Nikula <jani.nikula@intel.com>
Cc: Shashank Sharma <shashank.sharma@intel.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Chandra Konduru <chandra.konduru@intel.com>
Cc: Matt Roper <matthew.d.roper@intel.com>
Cc: <stable@vger.kernel.org> # 4.2.x
Reported-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Fixes: a1b2278e ("drm/i915: skylake panel fitting using shared scalers")
Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Mahesh Kumar <mahesh1.kumar@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20170720112820.26816-1-imre.deak@intel.comSigned-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
(cherry picked from commit 5fb9dadf)
Cc: stable@vger.kernel.org
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

Goto the right label in case of error, otherwise there is a leak.
This has been introduced by c5cf9a91. In this patch a goto has not been
updated.

Fixes: c5cf9a91 ("drm/i915: Create a kmem_cache to allocate struct i915_priolist from")
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Link: https://patchwork.freedesktop.org/patch/msgid/20170719223503.30580-1-christophe.jaillet@wanadoo.frReviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
(cherry picked from commit a5ec7fe8)
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

Taking the modeset locks unconditionally isn't the greatest idea,
because atm that part is still broken and times out (and then atomic
keels over). And there's really no reason to do so, the old code
didn't do that either.

To make the patch a bit simpler let's also nuke 2 cases that are only
around for the old mmioflip paths. Atomic nonblocking workers will not
die (minus bugs) when a gpu reset happens.

And of course this doesn't fix any of the gpu reset vs. modeset
deadlock fun, but it at least stop modern CI machines from keeling
over all over the place for no reason at all.

And we still have the explicit testcases to run the fake gpu reset, so
coverage isn't that much worse.

v2: Split out additional changes on top, restrict this to purely reducing
the critical section of modeset locks.

v2: Review from Maarten
- update comments
- don't oops when state is NULL in intel_finish_reset, but try to at
  least still drop locks properly. The hw is going to be toast anyway.

Fixes: 73974893 ("drm/i915: Fix modeset handling during gpu reset, v5.")
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20170719125502.25696-3-daniel.vetter@ffwll.ch
(cherry picked from commit ce87ea15)
Cc: stable@vger.kernel.org
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>