Commit Graph

106727 Commits

Author SHA1 Message Date
Richard Cochran b9acf24f77 ptp: tilegx: convert to the 64 bit get/set time methods.
This driver is 64 bit only, and so this driver and device are ready
for 2038.  This patch changes the driver to the new PHC and also
carries the timespec64 parameter on out to the gxio_mpipe_get-
set_timestamp functions, making explicit the fact that the tv_sec
field is 64 bits wide.

Not even compile tested.

Signed-off-by: Richard Cochran <richardcochran@gmail.com>
Acked-by: Chris Metcalf <cmetcalf@ezchip.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-03-31 12:01:18 -04:00
Iyappan Subramanian d31346494b dtb: xgene: Add interrupt for Tx completion
Signed-off-by: Iyappan Subramanian <isubramanian@apm.com>
Signed-off-by: Keyur Chudgar <kchudgar@apm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-03-27 14:18:48 -07:00
Sebastian Ott 358e048d67 s390: fix /proc/interrupts output
The irqclass_sub_desc array and enum interruption_class are out of sync
thus /proc/interrupts is broken. Remove IRQIO_CLW.

Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Ursula Braun <ursula.braun@de.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-03-25 11:41:41 -04:00
David S. Miller d5c1d8c567 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Conflicts:
	net/netfilter/nf_tables_core.c

The nf_tables_core.c conflict was resolved using a conflict resolution
from Stephen Rothwell as a guide.

Signed-off-by: David S. Miller <davem@davemloft.net>
2015-03-23 22:22:43 -04:00
Linus Torvalds d5049617a0 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc
Pull sparc fixes from David Miller:
 "Some perf bug fixes from David Ahern, and the fix for that nasty
  memmove() bug"

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc:
  sparc64: Fix several bugs in memmove().
  sparc: Touch NMI watchdog when walking cpus and calling printk
  sparc: perf: Add support M7 processor
  sparc: perf: Make counting mode actually work
  sparc: perf: Remove redundant perf_pmu_{en|dis}able calls
2015-03-23 10:04:02 -07:00
David S. Miller 2077cef4d5 sparc64: Fix several bugs in memmove().
Firstly, handle zero length calls properly.  Believe it or not there
are a few of these happening during early boot.

Next, we can't just drop to a memcpy() call in the forward copy case
where dst <= src.  The reason is that the cache initializing stores
used in the Niagara memcpy() implementations can end up clearing out
cache lines before we've sourced their original contents completely.

For example, considering NG4memcpy, the main unrolled loop begins like
this:

     load   src + 0x00
     load   src + 0x08
     load   src + 0x10
     load   src + 0x18
     load   src + 0x20
     store  dst + 0x00

Assume dst is 64 byte aligned and let's say that dst is src - 8 for
this memcpy() call.  That store at the end there is the one to the
first line in the cache line, thus clearing the whole line, which thus
clobbers "src + 0x28" before it even gets loaded.

To avoid this, just fall through to a simple copy only mildly
optimized for the case where src and dst are 8 byte aligned and the
length is a multiple of 8 as well.  We could get fancy and call
GENmemcpy() but this is good enough for how this thing is actually
used.

Reported-by: David Ahern <david.ahern@oracle.com>
Reported-by: Bob Picco <bpicco@meloft.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-03-23 09:22:10 -07:00
Linus Torvalds 3d7a6db537 Power management and ACPI fixes for v4.0-rc5
- Revert a recent PCI commit related to IRQ resources management
    that introduced a regression for drivers attempting to bind to
    devices whose previous drivers did not balance pci_enable_device()
    and pci_disable_device() as expected (Rafael J Wysocki).
 
  - Fix a deadlock in at91_rtc_interrupt() introduced by a typo in a
    recent commit related to wakeup interrupt handling (Dan Carpenter).
 
  - Allow the power capping RAPL (Running-Average Power Limit) driver
    to use different energy units for domains within one CPU package
    which is necessary to handle Intel Haswell EP processors correctly
    (Jacob Pan).
 
  - Improve the cpuidle mvebu driver's handling of Armada XP SoCs by
    updating the target residency and exit latency numbers for those
    chips (Sebastien Rannou).
 
  - Prevent the cpuidle mvebu driver from calling cpu_pm_enter() twice
    in a row before cpu_pm_exit() is called on the same CPU which
    breaks the core's assumptions regarding the usage of those
    functions (Gregory Clement).
 
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Merge tag 'pm+acpi-4.0-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull power management and ACPI fixes from Rafael Wysocki:
 "These are fixes for recent regressions (PCI/ACPI resources and at91
  RTC locking), a stable-candidate powercap RAPL driver fix and two ARM
  cpuidle fixes (one stable-candidate too).

  Specifics:

   - Revert a recent PCI commit related to IRQ resources management that
     introduced a regression for drivers attempting to bind to devices
     whose previous drivers did not balance pci_enable_device() and
     pci_disable_device() as expected (Rafael J Wysocki).

   - Fix a deadlock in at91_rtc_interrupt() introduced by a typo in a
     recent commit related to wakeup interrupt handling (Dan Carpenter).

   - Allow the power capping RAPL (Running-Average Power Limit) driver
     to use different energy units for domains within one CPU package
     which is necessary to handle Intel Haswell EP processors correctly
     (Jacob Pan).

   - Improve the cpuidle mvebu driver's handling of Armada XP SoCs by
     updating the target residency and exit latency numbers for those
     chips (Sebastien Rannou).

   - Prevent the cpuidle mvebu driver from calling cpu_pm_enter() twice
     in a row before cpu_pm_exit() is called on the same CPU which
     breaks the core's assumptions regarding the usage of those
     functions (Gregory Clement)"

* tag 'pm+acpi-4.0-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  Revert "x86/PCI: Refine the way to release PCI IRQ resources"
  rtc: at91rm9200: double locking bug in at91_rtc_interrupt()
  powercap / RAPL: handle domains with different energy units
  cpuidle: mvebu: Update cpuidle thresholds for Armada XP SOCs
  cpuidle: mvebu: Fix the CPU PM notifier usage
2015-03-21 12:51:36 -07:00
Linus Torvalds 60ed380eb8 arm64 fixes:
- mm switching fix where the kernel pgd ends up in the user TTBR0 after
   returning from an EFI run-time services call
 - fix __GFP_ZERO handling for atomic pool and CMA DMA allocations (the
   generic code does get the gfp flags, so it's left with the arch code
   to memzero accordingly)
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Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux

Pull arm64 fixes from Catalin Marinas:

 - mm switching fix where the kernel pgd ends up in the user TTBR0 after
   returning from an EFI run-time services call

 - fix __GFP_ZERO handling for atomic pool and CMA DMA allocations (the
   generic code does get the gfp flags, so it's left with the arch code
   to memzero accordingly)

* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
  arm64: Honor __GFP_ZERO in dma allocations
  arm64: efi: don't restore TTBR0 if active_mm points at init_mm
2015-03-21 10:24:10 -07:00
Linus Torvalds 62a202d749 Merge branch 'fixes' of git://ftp.arm.linux.org.uk/~rmk/linux-arm
Pull ARM fixes from Russell King:
 "Another few ARM fixes.  Fabrice fixed the L2 cache DT parsing to allow
  prefetch configuration to be specified even when the cache size
  parsing fails.

  Laura noticed that the setting of page attributes wasn't working for
  modules due to is_module_addr() always returning false.

  Marc Gonzalez (aka Mason) noticed a potential latent bug with the way
  we read one of the CPUID registers (where we could attempt to read a
  non-present CPUID register which may fault.)

  I've fixed an issue where 32-bit DMA masks were failing with memory
  which extended to the top of physical address space, and I've also
  added debugging output of the page tables when we hit a data access
  exception which we don't specifically handle - prompted by the lack of
  information in a bug report"

* 'fixes' of git://ftp.arm.linux.org.uk/~rmk/linux-arm:
  ARM: 8313/1: Use read_cpuid_ext() macro instead of inline asm
  ARM: 8311/1: Don't use is_module_addr in setting page attributes
  ARM: 8310/1: l2c: Fix prefetch settings dt parsing
  ARM: dump pgd, pmd and pte states on unhandled data abort faults
  ARM: dma-api: fix off-by-one error in __dma_supported()
2015-03-21 10:03:22 -07:00
David S. Miller 0fa74a4be4 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Conflicts:
	drivers/net/ethernet/emulex/benet/be_main.c
	net/core/sysctl_net_core.c
	net/ipv4/inet_diag.c

The be_main.c conflict resolution was really tricky.  The conflict
hunks generated by GIT were very unhelpful, to say the least.  It
split functions in half and moved them around, when the real actual
conflict only existed solely inside of one function, that being
be_map_pci_bars().

So instead, to resolve this, I checked out be_main.c from the top
of net-next, then I applied the be_main.c changes from 'net' since
the last time I merged.  And this worked beautifully.

The inet_diag.c and sysctl_net_core.c conflicts were simple
overlapping changes, and were easily to resolve.

Signed-off-by: David S. Miller <davem@davemloft.net>
2015-03-20 18:51:09 -04:00
Suzuki K. Poulose 7132813c38 arm64: Honor __GFP_ZERO in dma allocations
Current implementation doesn't zero out the pages allocated.
Honor the __GFP_ZERO flag and zero out if set.

Cc: <stable@vger.kernel.org> # v3.14+
Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Suzuki K. Poulose <suzuki.poulose@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2015-03-20 18:18:54 +00:00
Will Deacon 130c93fd10 arm64: efi: don't restore TTBR0 if active_mm points at init_mm
init_mm isn't a normal mm: it has swapper_pg_dir as its pgd (which
contains kernel mappings) and is used as the active_mm for the idle
thread.

When restoring the pgd after an EFI call, we write current->active_mm
into TTBR0. If the current task is actually the idle thread (e.g. when
initialising the EFI RTC before entering userspace), then the TLB can
erroneously populate itself with junk global entries as a result of
speculative table walks.

When we do eventually return to userspace, the task can end up hitting
these junk mappings leading to lockups, corruption or crashes.

This patch fixes the problem in the same way as the CPU suspend code by
ensuring that we never switch to the init_mm in efi_set_pgd and instead
point TTBR0 at the zero page. A check is also added to cpu_switch_mm to
BUG if we get passed swapper_pg_dir.

Reviewed-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Fixes: f3cdfd239d ("arm64/efi: move SetVirtualAddressMap() to UEFI stub")
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2015-03-20 17:05:16 +00:00
Rafael J. Wysocki 9e8ce4b96b Revert "x86/PCI: Refine the way to release PCI IRQ resources"
Commit b4b55cda58 (Refine the way to release PCI IRQ resources)
introduced a regression in the PCI IRQ resource management by causing
the IRQ resource of a device, established when pci_enabled_device()
is called on a fully disabled device, to be released when the driver
is unbound from the device, regardless of the enable_cnt.

This leads to the situation that an ill-behaved driver can now make a
device unusable to subsequent drivers by an imbalance in their use of
pci_enable/disable_device().  That is a serious problem for secondary
drivers like vfio-pci, which are innocent of the transgressions of
the previous driver.

Since the solution of this problem is not immediate and requires
further discussion, revert commit b4b55cda58 and the issue it was
supposed to address (a bug related to xen-pciback) will be taken
care of in a different way going forward.

Reported-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2015-03-20 14:56:19 +01:00
David Ahern 31aaa98c24 sparc: Touch NMI watchdog when walking cpus and calling printk
With the increase in number of CPUs calls to functions that dump
output to console (e.g., arch_trigger_all_cpu_backtrace) can take
a long time to complete. If IRQs are disabled eventually the NMI
watchdog kicks in and creates more havoc. Avoid by telling the NMI
watchdog everything is ok.

Signed-off-by: David Ahern <david.ahern@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-03-19 18:54:50 -07:00
David Ahern b5aff55d89 sparc: perf: Add support M7 processor
The M7 processor has a different hypervisor group id and different PCR fast
trap values. PIC read/write functions and PCR bit fields are the same as
the T4 so those are reused.

Signed-off-by: David Ahern <david.ahern@oracle.com>
Acked-by: Bob Picco <bob.picco@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-03-19 18:54:49 -07:00
David Ahern d51291cb8f sparc: perf: Make counting mode actually work
Currently perf-stat (aka, counting mode) does not work:

$ perf stat ls
...
 Performance counter stats for 'ls':

          1.585665      task-clock (msec)         #    0.580 CPUs utilized
                24      context-switches          #    0.015 M/sec
                 0      cpu-migrations            #    0.000 K/sec
                86      page-faults               #    0.054 M/sec
   <not supported>      cycles
   <not supported>      stalled-cycles-frontend
   <not supported>      stalled-cycles-backend
   <not supported>      instructions
   <not supported>      branches
   <not supported>      branch-misses

       0.002735100 seconds time elapsed

The reason is that state is never reset (stays with PERF_HES_UPTODATE set).
Add a call to sparc_pmu_enable_event during the added_event handling.
Clean up the encoding since pmu_start calls sparc_pmu_enable_event which
does the same. Passing PERF_EF_RELOAD to sparc_pmu_start means the call
to sparc_perf_event_set_period can be removed as well.

With this patch:

$ perf stat ls
...
 Performance counter stats for 'ls':

          1.552890      task-clock (msec)         #    0.552 CPUs utilized
                24      context-switches          #    0.015 M/sec
                 0      cpu-migrations            #    0.000 K/sec
                86      page-faults               #    0.055 M/sec
         5,748,997      cycles                    #    3.702 GHz
   <not supported>      stalled-cycles-frontend:HG
   <not supported>      stalled-cycles-backend:HG
         1,684,362      instructions:HG           #    0.29  insns per cycle
           295,133      branches:HG               #  190.054 M/sec
            28,007      branch-misses:HG          #    9.49% of all branches

       0.002815665 seconds time elapsed

Signed-off-by: David Ahern <david.ahern@oracle.com>
Acked-by: Bob Picco <bob.picco@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-03-19 18:54:49 -07:00
David Ahern 5b0d4b5514 sparc: perf: Remove redundant perf_pmu_{en|dis}able calls
perf_pmu_disable is called by core perf code before pmu->del and the
enable function is called by core perf code afterwards. No need to
call again within sparc_pmu_del.

Ditto for pmu->add and sparc_pmu_add.

Signed-off-by: David Ahern <david.ahern@oracle.com>
Acked-by: Bob Picco <bob.picco@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-03-19 18:54:49 -07:00
Linus Torvalds 18eda522c2 nios2 fixes for v4.0-rc5
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Merge tag 'nios2-fixes-v4.0-rc5' of git://git.rocketboards.org/linux-socfpga-next

Pull two arch/nios2 fixes from Ley Foon Tan:
 - Remove ucontext.h from exported arch headers
 - nios2: mm: do not invoke OOM killer on kernel fault OOM

* tag 'nios2-fixes-v4.0-rc5' of git://git.rocketboards.org/linux-socfpga-next:
  nios2: mm: do not invoke OOM killer on kernel fault OOM
  nios2: Remove ucontext.h from exported arch headers
2015-03-19 15:24:28 -07:00
Linus Torvalds 22283c8260 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc
Pull sparc fixes from David Miller:

 1) Some command cases of semtimedop() not even handled due to miscoded
    comparison on sparc64.  From Rob Gardner.

 2) Due to two bugs, /proc/kcore wan't working properly on sparc.

 3) Make sure fatal traps stop all running cpus, from Dave Kleikamp.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc:
  sparc: Fix /proc/kcore
  sparc: semtimedop() unreachable due to comparison error
  sparc: io_64.h: Replace io function-link macros
  sparc64: fatal trap should stop all cpus
  arch: sparc: kernel: starfire.c: Remove unused function
  arch: sparc: kernel: traps_64.c: Remove some unused functions
2015-03-19 13:11:55 -07:00
David S. Miller 3c08158e0e sparc: Fix /proc/kcore
/proc/kcore investigates the "System RAM" elements in /proc/iomem to
initialize it's memory tables.  Therefore we have to register them
before it tries to do so.  kcore uses device_initcall() so let's
use arch_initcall() for the registry.

Also we need ARCH_PROC_KCORE_TEXT to get the virtual addresses of
the kernel image correct.

Reported-by: David Ahern <david.ahern@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-03-18 19:15:28 -07:00
Linus Torvalds ec3fbff030 Merge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6
Pull crypto fixes from Herbert Xu:
 "Fix a bug in the ARM XTS implementation that can cause failures in
  decrypting encrypted disks, and fix is a memory overwrite bug that can
  cause a crash which can be triggered from userspace"

* git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6:
  crypto: aesni - fix memory usage in GCM decryption
  crypto: arm/aes update NEON AES module to latest OpenSSL version
2015-03-18 11:10:41 -07:00
Keyur Chudgar 2d33394e23 dtb: xgene: Add second SGMII based 1G interface node
- Added new SGMII node for port 1
- Added port-id field

Signed-off-by: Keyur Chudgar <kchudgar@apm.com>
Signed-off-by: Iyappan Subramanian <isubramanian@apm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-03-18 12:44:05 -04:00
Mason 526299ce4e ARM: 8313/1: Use read_cpuid_ext() macro instead of inline asm
Replace inline asm statement in __get_cpu_architecture() with equivalent
macro invocation, i.e. read_cpuid_ext(CPUID_EXT_MMFR0);

As an added bonus, this squashes a potential bug, described by Paul
Walmsley in commit 067e710b9a ("ARM: 7801/1: prevent gcc 4.5 from
reordering extended CP15 reads above is_smp() test").

Signed-off-by: Marc Gonzalez <marc_gonzalez@sigmadesigns.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2015-03-18 10:14:37 +00:00
Laura Abbott f2ca09f381 ARM: 8311/1: Don't use is_module_addr in setting page attributes
The set_memory_* functions currently only support module
addresses. The addresses are validated using is_module_addr.
That function is special though and relies on internal state
in the module subsystem to work properly. At the time of
module initialization and calling set_memory_*, it's too early
for is_module_addr to work properly so it always returns
false. Rather than be subject to the whims of the module state,
just bounds check against the module virtual address range.

Signed-off-by: Laura Abbott <lauraa@codeaurora.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2015-03-18 10:13:46 +00:00
Fabrice Gasnier 5c95ed47f1 ARM: 8310/1: l2c: Fix prefetch settings dt parsing
Allow prefetch settings overriding by device tree, in case
l2x0_cache_size_of_parse() returns value, prefetch tuning
properties are silently ignored. E.g. arm,double-linefill* and
arm,prefetch*.
This happens for example, when "cache-size" or "cache-sets"
properties haven't been filled in l2c dt node.

Comments from Fabrice Gasnier:

 Allow device tree to override the L2C prefetch settings, even when
 l2x0_cache_size_of_parse() fails to parse the cache geometry due to (eg)
 missing "cache-size" or "cache-sets" properties.

Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com>
Reviewed-by: Tomasz Figa <tomasz.figa@gmail.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2015-03-18 10:13:34 +00:00
Linus Torvalds c58616580e Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 fixes from Ingo Molnar:
 "Misc fixes from all around the place:

   - a KASLR related revert where we ran out of time to get a fix - this
     represents a substantial portion of the diffstat,

   - two FPU fixes,

   - two x86 platform fixes: an ACPI reduced-hw fix and a NumaChip fix,

   - an entry code fix,

   - and a VDSO build fix"

* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  Revert "x86/mm/ASLR: Propagate base load address calculation"
  x86/fpu: Drop_fpu() should not assume that tsk equals current
  x86/fpu: Avoid math_state_restore() without used_math() in __restore_xstate_sig()
  x86/apic/numachip: Fix sibling map with NumaChip
  x86/platform, acpi: Bypass legacy PIC and PIT in ACPI hardware reduced mode
  x86/asm/entry/32: Fix user_mode() misuses
  x86/vdso: Fix the build on GCC5
2015-03-17 13:32:17 -07:00
Linus Torvalds 2fc67756e3 Merge git://git.kernel.org/pub/scm/virt/kvm/kvm
Pull kvm fixes from Marcelo Tosatti:
 "KVM bug fixes (ARM and x86)"

* git://git.kernel.org/pub/scm/virt/kvm/kvm:
  arm/arm64: KVM: Keep elrsr/aisr in sync with software model
  KVM: VMX: Set msr bitmap correctly if vcpu is in guest mode
  arm/arm64: KVM: fix missing unlock on error in kvm_vgic_create()
  kvm: x86: i8259: return initialized data on invalid-size read
  arm64: KVM: Fix outdated comment about VTCR_EL2.PS
  arm64: KVM: Do not use pgd_index to index stage-2 pgd
  arm64: KVM: Fix stage-2 PGD allocation to have per-page refcounting
  kvm: move advertising of KVM_CAP_IRQFD to common code
2015-03-17 10:31:36 -07:00
Marcelo Tosatti f710a12d73 Fixes for KVM/ARM for 4.0-rc5.
Fixes page refcounting issues in our Stage-2 page table management code,
 fixes a missing unlock in a gicv3 error path, and fixes a race that can
 cause lost interrupts if signals are pending just prior to entering the
 guest.
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Merge tag 'kvm-arm-fixes-4.0-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm

Fixes for KVM/ARM for 4.0-rc5.

Fixes page refcounting issues in our Stage-2 page table management code,
fixes a missing unlock in a gicv3 error path, and fixes a race that can
cause lost interrupts if signals are pending just prior to entering the
guest.
2015-03-16 20:08:56 -03:00
Borislav Petkov 69797dafe3 Revert "x86/mm/ASLR: Propagate base load address calculation"
This reverts commit:

  f47233c2d3 ("x86/mm/ASLR: Propagate base load address calculation")

The main reason for the revert is that the new boot flag does not work
at all currently, and in order to make this work, we need non-trivial
changes to the x86 boot code which we didn't manage to get done in
time for merging.

And even if we did, they would've been too risky so instead of
rushing things and break booting 4.1 on boxes left and right, we
will be very strict and conservative and will take our time with
this to fix and test it properly.

Reported-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Baoquan He <bhe@redhat.com>
Cc: H. Peter Anvin <hpa@linux.intel.com
Cc: Jiri Kosina <jkosina@suse.cz>
Cc: Josh Triplett <josh@joshtriplett.org>
Cc: Junjie Mao <eternal.n08@gmail.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Matt Fleming <matt.fleming@intel.com>
Link: http://lkml.kernel.org/r/20150316100628.GD22995@pd.tnic
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2015-03-16 11:18:21 +01:00
Ley Foon Tan 6347e2a10f nios2: mm: do not invoke OOM killer on kernel fault OOM
Follow commit 871341023c.

Kernel faults are expected to handle OOM conditions gracefully (gup,
uaccess etc.), so they should never invoke the OOM killer.  Reserve
this for faults triggered in user context when it is the only option.

Signed-off-by: Ley Foon Tan <lftan@altera.com>
2015-03-16 15:35:25 +08:00
Tobias Klauser c105e86ace nios2: Remove ucontext.h from exported arch headers
Commit 92d5dd8cd6 ("nios2: update pt_regs") removed the nios2 specific
ucontext.h, replacing it with the version from asm-generic. Thus it's no
longer necessary to include ucontext.h in exported headers.

Cc: Chung-Ling Tang <cltang@codesourcery.com>
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
Acked-by: Ley Foon Tan <lftan@altera.com>
2015-03-16 10:20:41 +08:00
Linus Torvalds 1ee89c519a The clk fixes for 4.0-rc4 comprise three themes. First are the usual
driver fixes for new regressions since v3.19. Second are fixes to the
 common clock divider type caused by recent changes to how we round clock
 rates. This affects many clock drivers that use this common code.
 Finally there are fixes for drivers that improperly compared struct clk
 pointers (drivers must not deref these pointers). While some of these
 drivers have done this for a long time, this did not cause a problem
 until we started generating unique struct clk pointers for every
 consumer. A new function, clk_is_match was introduced to get these
 drivers working again and they are fixed up to no longer deref the
 pointers themselves.
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Merge tag 'clk-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux

Pull clock framework fixes from Michael Turquette:
 "The clk fixes for 4.0-rc4 comprise three themes.

  First are the usual driver fixes for new regressions since v3.19.

  Second are fixes to the common clock divider type caused by recent
  changes to how we round clock rates.  This affects many clock drivers
  that use this common code.

  Finally there are fixes for drivers that improperly compared struct
  clk pointers (drivers must not deref these pointers).  While some of
  these drivers have done this for a long time, this did not cause a
  problem until we started generating unique struct clk pointers for
  every consumer.  A new function, clk_is_match was introduced to get
  these drivers working again and they are fixed up to no longer deref
  the pointers themselves"

* tag 'clk-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux:
  ASoC: kirkwood: fix struct clk pointer comparing
  ASoC: fsl_spdif: fix struct clk pointer comparing
  ARM: imx: fix struct clk pointer comparing
  clk: introduce clk_is_match
  clk: don't export static symbol
  clk: divider: fix calculation of initial best divider when rounding to closest
  clk: divider: fix selection of divider when rounding to closest
  clk: divider: fix calculation of maximal parent rate for a given divider
  clk: divider: return real rate instead of divider value
  clk: qcom: fix platform_no_drv_owner.cocci warnings
  clk: qcom: fix platform_no_drv_owner.cocci warnings
  clk: qcom: Add PLL4 vote clock
  clk: qcom: lcc-msm8960: Fix PLL rate detection
  clk: qcom: Fix slimbus n and m val offsets
  clk: ti: Fix FAPLL parent enable bit handling
2015-03-15 15:07:08 -07:00
Linus Torvalds 6981e2af36 ARM: SoC fixes for 4.0-rc3
This is a rather unpleasantly large set of bug fixes for arm-soc,
 Most of them because of cross-tree dependencies for Exynos
 where we should have figured out the right path to merge things
 before the merge window, and then the maintainer being unable to
 sort things out in time during a business trip.
 
 The other changes contained here are the usual collection:
 
 MAINTAINERS file updates
  - Gregory Clement is now a co-maintainer for the legacy Marvell EBU
    platforms
  - A MAINTAINERS entry for the Freescale Vybrid platform that was
    added last year
  - Matt Porter no longer works as a maintainer on Broadcom SoCs
 
 Build-time issues
  - A compile-time error for at91
  - Several minor DT fixes on at91, imx, exynos, socfpga, and omap
  - The new digicolor platform was not correctly enabled at all
 
 Configuration issues
  - Two defconfig fix for regressions using USB on versatile
    express and on OMAP3
  - Enabling all 8 CPUs on Allwinner/SUNxi
  - Enabling the new STiH410 platform to be usable
 
 Bug fixes in platform code
  - A missing barrier for socfpga
  - Fixing LPDDR1 self-refresh mode on at91
  - Fixing RTC interrupt numbers on Exynos3250
  - Fixing a cache-coherency issues in CPU power-down
    on Exynos5
  - Multiple small OMAP power management fixes
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Merge tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc

Pull ARM SoC fixes from Arnd Bergmann:
 "This is a rather unpleasantly large set of bug fixes for arm-soc, Most
  of them because of cross-tree dependencies for Exynos where we should
  have figured out the right path to merge things before the merge
  window, and then the maintainer being unable to sort things out in
  time during a business trip.

  The other changes contained here are the usual collection:

  MAINTAINERS file updates
   - Gregory Clement is now a co-maintainer for the legacy Marvell EBU
     platforms
   - A MAINTAINERS entry for the Freescale Vybrid platform that was
     added last year
   - Matt Porter no longer works as a maintainer on Broadcom SoCs

  Build-time issues
   - A compile-time error for at91
   - Several minor DT fixes on at91, imx, exynos, socfpga, and omap
   - The new digicolor platform was not correctly enabled at all

  Configuration issues
   - Two defconfig fix for regressions using USB on versatile express
     and on OMAP3
   - Enabling all 8 CPUs on Allwinner/SUNxi
   - Enabling the new STiH410 platform to be usable

  Bug fixes in platform code
   - A missing barrier for socfpga
   - Fixing LPDDR1 self-refresh mode on at91
   - Fixing RTC interrupt numbers on Exynos3250
   - Fixing a cache-coherency issues in CPU power-down on Exynos5
   - Multiple small OMAP power management fixes"

* tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (69 commits)
  MAINTAINERS: Add myself as co-maintainer to the legacy support of the mvebu SoCs
  ARM: at91: pm_slowclock: fix the compilation error
  ARM: at91/dt: fix USB high-speed clock to select UTMI
  ARM: at91/dt: fix at91 udc compatible strings
  ARM: at91/dt: declare matrix node as a syscon device
  ARM: vexpress: update CONFIG_USB_ISP1760 option
  ARM: digicolor: add the machine directory to Makefile
  ARM: STi: Add STiH410 SoC support
  MAINTAINERS: add Freescale Vybrid SoC
  MAINTAINERS: Remove self as ARM mach-bcm co-maintainer
  ARM: imx6sl-evk: set swbst_reg as vbus's parent reg
  ARM: imx6qdl-sabresd: set swbst_reg as vbus's parent reg
  ARM: at91/dt: at91sam9261: fix clocks and clock-names in udc definition
  ARM: OMAP2+: Fix wl12xx on dm3730-evm with mainline u-boot
  ARM: OMAP: enable TWL4030_USB in omap2plus_defconfig
  ARM: dts: dra7x-evm: avoid possible contention while muxing on CAN lines
  ARM: dts: dra7x-evm: Don't use dcan1_rx.gpio1_15 in DCAN pinctrl
  ARM: dts: am43xx: fix SLEWCTRL_FAST pinctrl binding
  ARM: dts: am33xx: fix SLEWCTRL_FAST pinctrl binding
  ARM: dts: OMAP5: fix polling intervals for thermal zones
  ...
2015-03-15 10:49:38 -07:00
Linus Torvalds 9c987a33a8 arm64 fixes:
- add TLB invalidation for page table tear-down which was missed when
   support for CONFIG_HAVE_RCU_TABLE_FREE was added (assuming page table
   freeing was always deferred)
 - use UEFI for system and reset poweroff if available
 - fix asm label placement in relation to the alignment statement
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Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux

Pull arm64 fixes from Catalin Marinas:

 - add TLB invalidation for page table tear-down which was missed when
   support for CONFIG_HAVE_RCU_TABLE_FREE was added (assuming page table
   freeing was always deferred)

 - use UEFI for system and reset poweroff if available

 - fix asm label placement in relation to the alignment statement

* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
  arm64: put __boot_cpu_mode label after alignment instead of before
  efi/arm64: use UEFI for system reset and poweroff
  arm64: Invalidate the TLB corresponding to intermediate page table levels
2015-03-14 09:32:00 -07:00
Ard Biesheuvel 947bb7587f arm64: put __boot_cpu_mode label after alignment instead of before
Another one for the big head.S spring cleaning: the label should
be after the .align or it may point to the padding.

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2015-03-14 11:02:26 +00:00
Ard Biesheuvel 60c0d45a7f efi/arm64: use UEFI for system reset and poweroff
If UEFI Runtime Services are available, they are preferred over direct
PSCI calls or other methods to reset the system.

For the reset case, we need to hook into machine_restart(), as the
arm_pm_restart function pointer may be overwritten by modules.

Tested-by: Mark Rutland <mark.rutland@arm.com>
Reviewed-by: Mark Rutland <mark.rutland@arm.com>
Reviewed-by: Matt Fleming <matt.fleming@intel.com>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2015-03-14 11:00:18 +00:00
Catalin Marinas 285994a62c arm64: Invalidate the TLB corresponding to intermediate page table levels
The ARM architecture allows the caching of intermediate page table
levels and page table freeing requires a sequence like:

	pmd_clear()
	TLB invalidation
	pte page freeing

With commit 5e5f6dc105 (arm64: mm: enable HAVE_RCU_TABLE_FREE logic),
the page table freeing batching was moved from tlb_remove_page() to
tlb_remove_table(). The former takes care of TLB invalidation as this is
also shared with pte clearing and page cache page freeing. The latter,
however, does not invalidate the TLBs for intermediate page table levels
as it probably relies on the architecture code to do it if required.
When the mm->mm_users < 2, tlb_remove_table() does not do any batching
and page table pages are freed before tlb_finish_mmu() which performs
the actual TLB invalidation.

This patch introduces __tlb_flush_pgtable() for arm64 and calls it from
the {pte,pmd,pud}_free_tlb() directly without relying on deferred page
table freeing.

Fixes: 5e5f6dc105 arm64: mm: enable HAVE_RCU_TABLE_FREE logic
Reported-by: Jon Masters <jcm@redhat.com>
Tested-by: Jon Masters <jcm@redhat.com>
Tested-by: Steve Capper <steve.capper@linaro.org>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2015-03-14 10:48:30 +00:00
Linus Torvalds f47e331042 xen: bug fixes for 4.0-rc3
- Fix a PV regression in 3.19.
 - Fix a dom0 crash on hosts with large numbers of PIRQs.
 - Prevent pcifront from disabling memory or I/O port access, which may
   trigger host crashes.
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Merge tag 'stable/for-linus-4.0-rc3-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip

Pull xen bug fixes from David Vrabel:

 - fix a PV regression in 3.19.

 - fix a dom0 crash on hosts with large numbers of PIRQs.

 - prevent pcifront from disabling memory or I/O port access, which may
   trigger host crashes.

* tag 'stable/for-linus-4.0-rc3-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
  xen-pciback: limit guest control of command register
  xen/events: avoid NULL pointer dereference in dom0 on large machines
  xen: Remove trailing semicolon from xenbus_register_frontend() definition
  x86/xen: correct bug in p2m list initialization
2015-03-13 13:34:38 -07:00
Wincy Van 670125bda1 KVM: VMX: Set msr bitmap correctly if vcpu is in guest mode
In commit 3af18d9c5f ("KVM: nVMX: Prepare for using hardware MSR bitmap"),
we are setting MSR_BITMAP in prepare_vmcs02 if we should use hardware. This
is not enough since the field will be modified by following vmx_set_efer.

Fix this by setting vmx_msr_bitmap_nested in vmx_set_msr_bitmap if vcpu is
in guest mode.

Signed-off-by: Wincy Van <fanwenyi0529@gmail.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2015-03-13 09:24:51 -03:00
Oleg Nesterov f4c3686386 x86/fpu: Drop_fpu() should not assume that tsk equals current
drop_fpu() does clear_used_math() and usually this is correct
because tsk == current.

However switch_fpu_finish()->restore_fpu_checking() is called before
__switch_to() updates the "current_task" variable. If it fails,
we will wrongly clear the PF_USED_MATH flag of the previous task.

So use clear_stopped_child_used_math() instead.

Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Rik van Riel <riel@redhat.com>
Cc: <stable@vger.kernel.org>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Pekka Riikonen <priikone@iki.fi>
Cc: Quentin Casasnovas <quentin.casasnovas@oracle.com>
Cc: Suresh Siddha <sbsiddha@gmail.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/20150309171041.GB11388@redhat.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2015-03-13 12:44:29 +01:00
Oleg Nesterov a7c80ebcac x86/fpu: Avoid math_state_restore() without used_math() in __restore_xstate_sig()
math_state_restore() assumes it is called with irqs disabled,
but this is not true if the caller is __restore_xstate_sig().

This means that if ia32_fxstate == T and __copy_from_user()
fails, __restore_xstate_sig() returns with irqs disabled too.

This triggers:

  BUG: sleeping function called from invalid context at kernel/locking/rwsem.c:41
   dump_stack
   ___might_sleep
   ? _raw_spin_unlock_irqrestore
   __might_sleep
   down_read
   ? _raw_spin_unlock_irqrestore
   print_vma_addr
   signal_fault
   sys32_rt_sigreturn

Change __restore_xstate_sig() to call set_used_math()
unconditionally. This avoids enabling and disabling interrupts
in math_state_restore(). If copy_from_user() fails, we can
simply do fpu_finit() by hand.

[ Note: this is only the first step. math_state_restore() should
        not check used_math(), it should set this flag. While
	init_fpu() should simply die. ]

Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: <stable@vger.kernel.org>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Pekka Riikonen <priikone@iki.fi>
Cc: Quentin Casasnovas <quentin.casasnovas@oracle.com>
Cc: Rik van Riel <riel@redhat.com>
Cc: Suresh Siddha <sbsiddha@gmail.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/20150307153844.GB25954@redhat.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2015-03-13 12:44:28 +01:00
Stephan Mueller ccfe8c3f7e crypto: aesni - fix memory usage in GCM decryption
The kernel crypto API logic requires the caller to provide the
length of (ciphertext || authentication tag) as cryptlen for the
AEAD decryption operation. Thus, the cipher implementation must
calculate the size of the plaintext output itself and cannot simply use
cryptlen.

The RFC4106 GCM decryption operation tries to overwrite cryptlen memory
in req->dst. As the destination buffer for decryption only needs to hold
the plaintext memory but cryptlen references the input buffer holding
(ciphertext || authentication tag), the assumption of the destination
buffer length in RFC4106 GCM operation leads to a too large size. This
patch simply uses the already calculated plaintext size.

In addition, this patch fixes the offset calculation of the AAD buffer
pointer: as mentioned before, cryptlen already includes the size of the
tag. Thus, the tag does not need to be added. With the addition, the AAD
will be written beyond the already allocated buffer.

Note, this fixes a kernel crash that can be triggered from user space
via AF_ALG(aead) -- simply use the libkcapi test application
from [1] and update it to use rfc4106-gcm-aes.

Using [1], the changes were tested using CAVS vectors to demonstrate
that the crypto operation still delivers the right results.

[1] http://www.chronox.de/libkcapi.html

CC: Tadeusz Struk <tadeusz.struk@intel.com>
Cc: stable@vger.kernel.org
Signed-off-by: Stephan Mueller <smueller@chronox.de>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2015-03-13 21:32:21 +11:00
Chen Gang 65b9ab888c arch/c6x/include/asm/pgtable.h: define dummy pgprot_writecombine for !MMU
When !MMU, asm-generic will not define default pgprot_writecombine, so c6x
needs to define it by itself.  The related error:

    CC [M]  fs/pstore/ram_core.o
  fs/pstore/ram_core.c: In function 'persistent_ram_vmap':
  fs/pstore/ram_core.c:399:10: error: implicit declaration of function 'pgprot_writecombine' [-Werror=implicit-function-declaration]
     prot = pgprot_writecombine(PAGE_KERNEL);
            ^
  fs/pstore/ram_core.c:399:8: error: incompatible types when assigning to type 'pgprot_t {aka struct <anonymous>}' from type 'int'
     prot = pgprot_writecombine(PAGE_KERNEL);
          ^

Signed-off-by: Chen Gang <gang.chen.5i5j@gmail.com>
Cc: Mark Salter <msalter@redhat.com>
Cc: Aurelien Jacquiot <a-jacquiot@ti.com>
Cc: "Kirill A. Shutemov" <kirill@shutemov.name>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-03-12 18:46:08 -07:00
Petr Matousek c1a6bff28c kvm: x86: i8259: return initialized data on invalid-size read
If data is read from PIC with invalid access size, the return data stays
uninitialized even though success is returned.

Fix this by always initializing the data.

Signed-off-by: Petr Matousek <pmatouse@redhat.com>
Reported-by: Nadav Amit <nadav.amit@gmail.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2015-03-12 22:02:46 -03:00
Linus Torvalds d3dd73fc9e Microblaze patches for 4.0-rc4
- Fix syscall error recovery
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Merge tag 'microblaze-4.0-rc4' of git://git.monstr.eu/linux-2.6-microblaze

Pull arch/microblaze fixes from Michal Simek:
 "Fix syscall error recovery.

  Two patches - one is just preparation patch for the second which is
  fixing the problem with syscalls"

* tag 'microblaze-4.0-rc4' of git://git.monstr.eu/linux-2.6-microblaze:
  microblaze: Fix syscall error recovery for invalid syscall IDs
  microblaze: Coding style cleanup
2015-03-12 09:34:10 -07:00
Linus Torvalds 5627511205 nios2 fix for v4.0-rc4
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Merge tag 'nios2-fix-4.0-rc4' of git://git.rocketboards.org/linux-socfpga-next

Pull arch/nios2 fix from Ley Foon Tan:
 "Remove pt_regs from user header and use generic ucontext.h"

* tag 'nios2-fix-4.0-rc4' of git://git.rocketboards.org/linux-socfpga-next:
  nios2: update pt_regs
2015-03-12 09:23:30 -07:00
Daniel J Blueman c8a470cab0 x86/apic/numachip: Fix sibling map with NumaChip
On NumaChip systems, the physical processor ID assignment wasn't
accounting for the number of nodes in AMD multi-module
processors, giving an incorrect sibling map:

  $ cd /sys/devices/system/cpu/cpu29/topology
  $ grep . *
  core_id:5
  core_siblings:00000000,ff000000
  core_siblings_list:24-31
  physical_package_id:3
  thread_siblings:00000000,30000000
  thread_siblings_list:28-29

This fixes it:

  $ cd /sys/devices/system/cpu/cpu29/topology
  $ grep . *
  core_id:5
  core_siblings:00000000,ffff0000
  core_siblings_list:16-31
  physical_package_id:1
  thread_siblings:00000000,30000000
  thread_siblings_list:28-29

Signed-off-by: Daniel J Blueman <daniel@numascale.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: <stable@vger.kernel.org>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Steffen Persvold <sp@numascale.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1426135950-10110-1-git-send-email-daniel@numascale.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2015-03-12 16:58:59 +01:00
Li, Aubrey 7486341a98 x86/platform, acpi: Bypass legacy PIC and PIT in ACPI hardware reduced mode
On a platform in ACPI Hardware-reduced mode, the legacy PIC and
PIT may not be initialized even though they may be present in
silicon. Touching these legacy components causes unexpected
results on the system.

On the Bay Trail-T(ASUS-T100) platform, touching these legacy
components blocks platform hardware low idle power state(S0ix)
during system suspend. So we should bypass them in ACPI hardware
reduced mode.

Suggested-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Li Aubrey <aubrey.li@linux.intel.com>
Cc: <alan@linux.intel.com>
Cc: Alan Cox <alan@linux.intel.com>
Cc: H. Peter Anvin <hpa@linux.intel.com>
Cc: Len Brown <len.brown@intel.com>
Cc: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Cc: Rafael J. Wysocki <rjw@rjwysocki.net>
Link: http://lkml.kernel.org/r/54FFF81C.20703@linux.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2015-03-12 12:07:13 +01:00
Chung-Ling Tang 92d5dd8cd6 nios2: update pt_regs
Remove struct pt_regs from user header and use generic ucontext.h.

Signed-off-by: Chung-Ling Tang <cltang@codesourcery.com>
Acked-by: Ley Foon Tan <lftan@altera.com>
2015-03-12 13:35:06 +08:00
Shawn Guo a51139fdbc ARM: imx: fix struct clk pointer comparing
Since commit 035a61c314 ("clk: Make clk API return per-user struct clk
instances"), clk API users can no longer check if two struct clk
pointers are pointing to the same hardware clock, i.e. struct clk_hw, by
simply comparing two pointers.  That's because with the per-user clk
change, a brand new struct clk is created whenever clients try to look
up the clock by calling clk_get() or sister functions like clk_get_sys()
and of_clk_get().  This changes the original behavior where the struct
clk is only created for once when clock driver registers the clock to
CCF in the first place.  The net change here is before commit
035a61c314 the struct clk pointer is unique for given hardware
clock, while after the commit the pointers returned by clk lookup calls
become different for the same hardware clock.

That said, the struct clk pointer comparing in the code doesn't work any
more.  Call helper function clk_is_match() instead to fix the problem.

Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: Michael Turquette <mturquette@linaro.org>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
2015-03-11 16:00:20 -07:00