simple_strtoull() is obsolete, use the newer kstrtoull() instead.
Signed-off-by: NSebastien Bourdelin <sebastien.bourdelin@savoirfairelinux.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Fix two format string mismatch in genwqe_init_debugfs()
Signed-off-by: NMasanari Iida <standby24x7@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

According to the driver descriptions, the atmel_pwm and atmel-ssc
drivers are only useful on Atmel AT32 and AT91 systems. So add
hardware dependencies to these drivers to hide them on other systems.
Signed-off-by: NJean Delvare <jdelvare@suse.de>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

The current code posts periodic memory pressure status from a dedicated thread.
Under some conditions, especially when we are releasing a lot of memory into
the guest, we may not send timely pressure reports back to the host. Fix this
issue by reporting pressure in all contexts that can be active in this driver.
Signed-off-by: NK. Y. Srinivasan <kys@microsoft.com>
Cc: stable@vger.kernel.org
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

pfncount is of type u32 and thus can never be smaller than 0.

Found by the coverity scanner, CID 143213.
Signed-off-by: NTobias Klauser <tklauser@distanz.ch>
Signed-off-by: NK. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Currently the mapping of the relID to channel is done under the protection of a
single spin lock. Starting with ws2012, each channel is bound to a specific VCPU
in the guest. Use this binding to eliminate the spin lock by setting up
per-cpu state for mapping relId to the channel.
Signed-off-by: NK. Y. Srinivasan <kys@microsoft.com>
Reviewed-by: NHaiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

By ensuring that we set the callback handler to NULL in the channel close
path on the same CPU that the channel is bound to, we can eliminate this lock
acquisition and release in a performance critical path.
Signed-off-by: NK. Y. Srinivasan <kys@microsoft.com>
Reviewed-by: NHaiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Adding power gating introduced new waiting state for client also during
connection attempt, a connection request can be queued for later either due
device is power gated or due to other on going connection.
We setting client connection state before start of full connect procedure so
in both cased the client state will be MEI_FILE_CONNECTING
which create interlock between the two connection attempts, both
detecting that another connection is in progress.

The interlock is resolved by moving client to connecting state
only upon connection request transmission, so the  first
cb in queue can be processed.
Signed-off-by: NAlexander Usyskin <alexander.usyskin@intel.com>
Signed-off-by: NTomas Winkler <tomas.winkler@intel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Follow-up for bits missed in
commit 7ca96aa2
mei: make return values consistent across the driver
Signed-off-by: NAlexander Usyskin <alexander.usyskin@intel.com>
Signed-off-by: NTomas Winkler <tomas.winkler@intel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Fetch FW status registers, as they are important in
in understanding of FW reset reasons
Signed-off-by: NAlexander Usyskin <alexander.usyskin@intel.com>
Signed-off-by: NTomas Winkler <tomas.winkler@intel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Communicate hbm version 1.1 to firmware to tell that we
now support power gating isolation protocol
Signed-off-by: NTomas Winkler <tomas.winkler@intel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

For non wakeable devices we can't use pci runtime framework
as we are not able to wakeup from D3 states.
Instead we create new pg runtime domain that only drives TXE power
gating protocol to reduce the power consumption.
Signed-off-by: NAlexander Usyskin <alexander.usyskin@intel.com>
Signed-off-by: NTomas Winkler <tomas.winkler@intel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

For non wakeable devices we can't use pci runtime framework
as we are not able to wakeup from D3 states.
Instead we create new pg runtime domain that only drives ME power
gating protocol to reduce the power consumption.
Signed-off-by: NTomas Winkler <tomas.winkler@intel.com>
Signed-off-by: NAlexander Usyskin <alexander.usyskin@intel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Take rpm token on operation start to initiate rpm resume if needed.
Mark last busy time, release token and advice rpm framework
to try to autosuspend on operation end.
Signed-off-by: NTomas Winkler <tomas.winkler@intel.com>
Signed-off-by: NAlexander Usyskin <alexander.usyskin@intel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Add runtime pm framework for TXE devices.
The runtime pm handlers are used to run
txe power gating isolation protocol.
Signed-off-by: NAlexander Usyskin <alexander.usyskin@intel.com>
Signed-off-by: NTomas Winkler <tomas.winkler@intel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Add runtime pm framework for ME devices.
The runtime pm handlers are used to run
me power gating isolation protocol
Signed-off-by: NTomas Winkler <tomas.winkler@intel.com>
Signed-off-by: NAlexander Usyskin <alexander.usyskin@intel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

The driver needs to check whether the write
queue idle before entering power gating
Signed-off-by: NTomas Winkler <tomas.winkler@intel.com>
Signed-off-by: NAlexander Usyskin <alexander.usyskin@intel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

For power gating entry we write hbm pg entry request command and
then we set pg register
For power gating exit we clear pg register and wait for exit request
hbm command.

Exit power gating request might also be initiated by the firmware
w/o explicit driver request

The power gating state is tracked by pg_state member of me_hw
Signed-off-by: NTomas Winkler <tomas.winkler@intel.com>
Signed-off-by: NAlexander Usyskin <alexander.usyskin@intel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Since the runtime pm and the internal power gating
cannot be in complete sync in regards to I/O
operations, we need to expose the device
hardware internal power gating state to mei layer

2. We add pg_state handler that translate the hw
internal pg state to mei layer

2. We add power gating event variable to keep
power track of power gating transitions
Signed-off-by: NTomas Winkler <tomas.winkler@intel.com>
Signed-off-by: NAlexander Usyskin <alexander.usyskin@intel.com>
Reviewed-by: NAlexander Usyskin <alexander.usyskin@intel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Enable power gating isolation only if hw and fw support it.
This is indicated by ME_PGIC_HRA bit in ME_CSR_HA register
and on HBM protocol version.

The information is exported to MEI layer through
new pg_is_enabled hw op.
Signed-off-by: NTomas Winkler <tomas.winkler@intel.com>
Signed-off-by: NAlexander Usyskin <alexander.usyskin@intel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Add entry and exit power gating isolation register
write handler.
Signed-off-by: NTomas Winkler <tomas.winkler@intel.com>
Signed-off-by: NAlexander Usyskin <alexander.usyskin@intel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

LPT devices have internal power gating handled
through registers and hbm calls
Signed-off-by: NTomas Winkler <tomas.winkler@intel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Add send message functions and receive dispatch stubs
for power gating isolation hbm protocol.

The protocol consist of requests for entering and exiting
the power gating isolation state and their responses.
Signed-off-by: NTomas Winkler <tomas.winkler@intel.com>
Signed-off-by: NAlexander Usyskin <alexander.usyskin@intel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

The asm-generic, big-endian version of zero_bytemask creates a mask of
bytes preceding the first zero-byte by left shifting ~0ul based on the
position of the first zero byte.

Unfortunately, if the first (top) byte is zero, the output of
prep_zero_mask has only the top bit set, resulting in undefined C
behaviour as we shift left by an amount equal to the width of the type.
As it happens, GCC doesn't manage to spot this through the call to fls(),
but the issue remains if architectures choose to implement their shift
instructions differently.

An example would be arch/arm/ (AArch32), where LSL Rd, Rn, #32 results
in Rd == 0x0, whilst on arch/arm64 (AArch64) LSL Xd, Xn, #64 results in
Xd == Xn.

Rather than check explicitly for the problematic shift, this patch adds
an extra shift by 1, replacing fls with __fls. Since zero_bytemask is
never called with a zero argument (has_zero() is used to check the data
first), we don't need to worry about calling __fls(0), which is
undefined.

Cc: <stable@vger.kernel.org>
Cc: Victor Kamensky <victor.kamensky@linaro.org>
Signed-off-by: NWill Deacon <will.deacon@arm.com>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

This merges the patch to fix possible loss of dirty bit on munmap() or
madvice(DONTNEED).  If there are concurrent writers on other CPU's that
have the unmapped/unneeded page in their TLBs, their writes to the page
could possibly get lost if a third CPU raced with the TLB flush and did
a page_mkclean() before the page was fully written.

Admittedly, if you unmap() or madvice(DONTNEED) an area _while_ another
thread is still busy writing to it, you deserve all the lost writes you
could get.  But we kernel people hold ourselves to higher quality
standards than "crazy people deserve to lose", because, well, we've seen
people do all kinds of crazy things.

So let's get it right, just because we can, and we don't have to worry
about it.

* safe-dirty-tlb-flush:
  mm: split 'tlb_flush_mmu()' into tlb flushing and memory freeing parts

Pull btrfs fixes from Chris Mason.

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs:
  Btrfs: limit the path size in send to PATH_MAX
  Btrfs: correctly set profile flags on seqlock retry
  Btrfs: use correct key when repeating search for extent item
  Btrfs: fix inode caching vs tree log
  Btrfs: fix possible memory leaks in open_ctree()
  Btrfs: avoid triggering bug_on() when we fail to start inode caching task
  Btrfs: move btrfs_{set,clear}_and_info() to ctree.h
  btrfs: replace error code from btrfs_drop_extents
  btrfs: Change the hole range to a more accurate value.
  btrfs: fix use-after-free in mount_subvol()

Pull arm fixes from Russell King:
 "A number of fixes for the PJ4/iwmmxt changes which arm-soc forced me
  to take during the merge window.  This stuff should have been better
  tested and sorted out *before* the merge window"

* 'fixes' of git://ftp.arm.linux.org.uk/~rmk/linux-arm:
  ARM: 8042/1: iwmmxt: allow to build iWMMXt on Marvell PJ4B
  ARM: 8041/1: pj4: fix cpu_is_pj4 check
  ARM: 8040/1: pj4: properly detect existence of iWMMXt coprocessor
  ARM: 8039/1: pj4: enable iWMMXt only if CONFIG_IWMMXT is set
  ARM: 8038/1: iwmmxt: explicitly check for supported architectures

Pull arm64 fixes from Catalin Marinas:
 - compat renameat2 syscall wiring and __NR_compat_syscalls fix
 - TLB fix for transparent huge pages following switch to generic
   mmu_gather
 - spinlock initialisation for init_mm's context
 - move of_clk_init() earlier
 - Kconfig duplicate entry fix

* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
  arm64: init: Move of_clk_init to time_init
  arm64: initialize spinlock for init_mm's context
  arm64: debug: remove noisy, pointless warning
  arm64: mm: Add THP TLB entries to general mmu_gather
  arm64: add renameat2 compat syscall
  ARM64: Remove duplicated Kconfig entry for "kernel/power/Kconfig"
  arm64: __NR_compat_syscalls fix

Pull irq fixes from Thomas Gleixner:
 "A slighlty large fix for a subtle issue in the CPU hotplug code of
  certain ARM SoCs, where the not yet online cpu needs to setup the cpu
  local timer and needs to set the interrupt affinity to itself.
  Setting interrupt affinity to a not online cpu is prohibited and
  therefor the timer interrupt ends up on the wrong cpu, which leads to
  nasty complications.

  The SoC folks tried to hack around that in the SoC code in some more
  than nasty ways.  The proper solution is to have a way to enforce the
  affinity setting to a not online cpu.  The core patch to the genirq
  code provides that facility and the follow up patches make use of it
  in the GIC interrupt controller and the exynos timer driver.

  The change to the core code has no implications to existing users,
  except for the rename of the locked function and therefor the
  necessary fixup in mips/cavium.  Aside of that, no runtime impact is
  possible, as none of the existing interrupt chips implements anything
  which depends on the force argument of the irq_set_affinity()
  callback"

* 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  clocksource: Exynos_mct: Register clock event after request_irq()
  clocksource: Exynos_mct: Use irq_force_affinity() in cpu bringup
  irqchip: Gic: Support forced affinity setting
  genirq: Allow forcing cpu affinity of interrupts

Pull tty/serial fixes from Greg KH:
 "Here are a few tty/serial fixes for 3.15-rc3 that resolve a number of
  reported issues in the 8250 and samsung serial drivers, as well as a
  character loss fix for the tty core that was caused by the lock
  removal patches a release ago"

* tag 'tty-3.15-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty:
  serial_core: fix uart PORT_UNKNOWN handling
  serial: samsung: Change barrier() to cpu_relax() in console output
  serial: samsung: don't check config for every character
  serial: samsung: Use the passed in "port", fixing kgdb w/ no console
  serial: 8250: Fix thread unsafe __dma_tx_complete function
  8250_core: Fix unwanted TX chars write
  tty: Fix race condition between __tty_buffer_request_room and flush_to_ldisc

Pull staging / IIO driver fixes from Greg KH:
 "Here are some small staging and IIO driver fixes for 3.15-rc3.

  Nothing major at all, just some assorted issues that people have
  reported"

* tag 'staging-3.15-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging:
  staging: comedi: usbdux: bug fix for accessing 'ao_chanlist' in private data
  iio: adc: mxs-lradc: fix warning when buidling on avr32
  iio: cm36651: Fix i2c client leak and possible NULL pointer dereference
  iio: querying buffer scan_mask should return 0/1
  staging:iio:ad2s1200 fix a missing break
  iio: adc: at91_adc: correct default shtim value
  ARM: at91: at91sam9260: change at91_adc name
  ARM: at91: at91sam9g45: change at91_adc name
  iio: cm32181: Fix read integration time function
  iio: adc: at91_adc: Repair broken platform_data support

Merge tag 'driver-core-3.15-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core

Pull driver core fixes from Greg KH:
 "Here are some kernfs fixes for 3.15-rc3 that resolve some reported
  problems.  Nothing huge, but all needed"

* tag 'driver-core-3.15-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core:
  s390/ccwgroup: Fix memory corruption
  kernfs: add back missing error check in kernfs_fop_mmap()
  kernfs: fix a subdir count leak

Pull USB fixes from Greg KH:
 "Here are a number of USB fixes for 3.15-rc3.  The majority are gadget
  fixes, as we didn't get any of those in for 3.15-rc2.  The others are
  all over the place, and there's a number of new device id addtions as
  well."

* tag 'usb-3.15-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (35 commits)
  usb: option: add and update a number of CMOTech devices
  usb: option: add Alcatel L800MA
  usb: option: add Olivetti Olicard 500
  usb: qcserial: add Sierra Wireless MC7305/MC7355
  usb: qcserial: add Sierra Wireless MC73xx
  usb: qcserial: add Sierra Wireless EM7355
  USB: io_ti: fix firmware download on big-endian machines
  usb/xhci: fix compilation warning when !CONFIG_PCI && !CONFIG_PM
  xhci: extend quirk for Renesas cards
  xhci: Switch Intel Lynx Point ports to EHCI on shutdown.
  usb: xhci: Prefer endpoint context dequeue pointer over stopped_trb
  phy: core: make NULL a valid phy reference if !CONFIG_GENERIC_PHY
  phy: fix kernel oops in phy_lookup()
  phy: restore OMAP_CONTROL_PHY dependencies
  phy: exynos: fix building as a module
  USB: serial: fix sysfs-attribute removal deadlock
  usb: wusbcore: fix panic in wusbhc_chid_set
  usb: wusbcore: convert nested lock to use spin_lock instead of spin_lock_irq
  uwb: don't call spin_unlock_irq in a USB completion handler
  usb: chipidea: coordinate usb phy initialization for different phy type
  ...

Pull ACPI and power management fixes from Rafael Wysocki:
 "These include a fix for a recent ACPI regression related to device
  notifications, intel_idle fix related to IvyTown support, fix for a
  buffer size issue in ACPICA, PM core fix related to the "freeze" sleep
  state, four fixes for various types of breakage in cpufreq drivers, a
  PNP workaround for a wrong memory region size in ACPI tables, and a
  fix and cleanup for the ACPI tools Makefile.

  Specifics:

   - Fix for broken ACPI notifications on some systems caused by a
     recent ACPI hotplug commit that blocked the propagation of unknown
     type notifications to device drivers inadvertently.

   - intel_idle fix to make the IvyTown C-states handling (added
     recently) work as intended which now is broken due to missing
     braces.  From Christoph Jaeger.

   - ACPICA fix to make it allocate buffers of the right sizes for the
     Generic Serial Bus operation region access.  From Lv Zheng.

   - PM core fix unblocking cpuidle before entering the "freeze" sleep
     state which causes that state to be able to actually save more
     energy than runtime idle.

   - Configuration and build fixes for the highbank and powernv cpufreq
     drivers from Kefeng Wang and Srivatsa S Bhat.

   - Coccinelle warning fix related to error pointers for the unicore32
     cpufreq driver from Duan Jiong.

   - Integer overflow fix for the ppc-corenet cpufreq driver from Geert
     Uytterhoeven.

   - Workaround for BIOSes that don't report the entire Intel MCH area
     in their ACPI tables from Bjorn Helgaas.

   - ACPI tools Makefile fix and cleanup from Thomas Renninger"

* tag 'pm+acpi-3.15-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  ACPI / notify: Do not block unknown type notifications in root handler
  PNP: Work around BIOS defects in Intel MCH area reporting
  cpufreq: highbank: fix ARM_HIGHBANK_CPUFREQ dependency warning
  cpufreq: ppc: Fix integer overflow in expression
  cpufreq, powernv: Fix build failure on UP
  cpufreq: unicore32: replace IS_ERR and PTR_ERR with PTR_ERR_OR_ZERO
  PM / suspend: Make cpuidle work in the "freeze" state
  intel_idle: fix IVT idle state table setting
  ACPICA: Fix buffer allocation issue for generic_serial_bus region accesses.
  tools/power/acpi: Minor bugfixes

fs_path_ensure_buf is used to make sure our path buffers for
send are big enough for the path names as we construct them.
The buffer size is limited to 32K by the length field in
the struct.

But bugs in the path construction can end up trying to build
a huge buffer, and we'll do invalid memmmoves when the
buffer length field wraps.

This patch is step one, preventing the overflows.
Signed-off-by: NChris Mason <clm@fb.com>

The mmu-gather operation 'tlb_flush_mmu()' has done two things: the
actual tlb flush operation, and the batched freeing of the pages that
the TLB entries pointed at.

This splits the operation into separate phases, so that the forced
batched flushing done by zap_pte_range() can now do the actual TLB flush
while still holding the page table lock, but delay the batched freeing
of all the pages to after the lock has been dropped.

This in turn allows us to avoid a race condition between
set_page_dirty() (as called by zap_pte_range() when it finds a dirty
shared memory pte) and page_mkclean(): because we now flush all the
dirty page data from the TLB's while holding the pte lock,
page_mkclean() will be held up walking the (recently cleaned) page
tables until after the TLB entries have been flushed from all CPU's.
Reported-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
Tested-by: NDave Hansen <dave.hansen@intel.com>
Acked-by: NHugh Dickins <hughd@google.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Russell King - ARM Linux <linux@arm.linux.org.uk>
Cc: Tony Luck <tony.luck@intel.com>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

* pnp:
  PNP: Work around BIOS defects in Intel MCH area reporting

* acpi-hotplug:
  ACPI / notify: Do not block unknown type notifications in root handler

Pull hwmon fixes from Guenter Roeck:
 - ltc2945: Don't unecessarily crash kernel on implementation error
 - vexpress: Fix 'name' and 'label' attributes

* tag 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging:
  hwmon: (ltc2945) Don't crash the kernel unnecessarily
  hwmon: (vexpress) Avoid creating non-existing attributes
  hwmon: (vexpress) Use legal hwmon device names

Pull SCSI fixes from James Bottomley:
 "This is a set of seven fixes, three (hpsa) and free'd command
  references correcting bugs in the last round of updates and the
  remaining four correcting problems within the SCSI error handler that
  was causing a deadlock within USB"

* tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
  [SCSI] More USB deadlock fixes
  [SCSI] Fix USB deadlock caused by SCSI error handling
  [SCSI] Fix command result state propagation
  [SCSI] Fix spurious request sense in error handling
  [SCSI] don't reference freed command in scsi_prep_return
  [SCSI] don't reference freed command in scsi_init_sgtable
  [SCSI] hpsa: fix NULL dereference in hpsa_put_ctlr_into_performant_mode()