Commit Graph

456159 Commits

Author SHA1 Message Date
Horia Geanta cbb4d3e651 scripts/kernel-doc: handle object-like macros
Object-like macros are different than function-like macros:
https://gcc.gnu.org/onlinedocs/cpp/Object-like-Macros.html
https://gcc.gnu.org/onlinedocs/cpp/Function-like-Macros.html

They are not parsed correctly, generating invalid intermediate
files (xmls) for cases like:
    #define BIT_MASK    (0xFF << BIT_SHIFT)
where "OxFF <<" is considered to be parameter type.

When parsing, we can differentiate beween these two types of macros by
checking whether there is at least one whitespace b/w "#define" and
first opening parenthesis.

Signed-off-by: Horia Geanta <horia.geanta@freescale.com>
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-07-12 11:30:36 -07:00
Paul Bolle c8c3f7d621 Documentation/Changes: clean up mcelog paragraph
The paragraph on mcelog currently describes kernel v2.6.31. In that
kernel the mce code (for i386, that is) was in transition. Ever since
v2.6.32 the situation is much simpler (eg, mcelog is now needed to
process events on almost all x86 machines, i386 and x86-64). Since this
"document is designed to provide a list of the minimum levels of
software necessary to run the 3.0 kernels" let's just describe that
situation.

Signed-off-by: Paul Bolle <pebolle@tiscali.nl>
Acked-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-07-12 11:30:36 -07:00
Bo Shen 363d4ddc17 ARM: at91: at91sam9x5: add clocks for usb device
Add clocks for usb device, or else switch to CCF, the gadget
won't work.

Reported-by: Jiri Prchal <jiri.prchal@aksignal.cz>
Signed-off-by: Bo Shen <voice.shen@atmel.com>
Acked-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Tested-by: Jiri Prchal <jiri.prchal@aksignal.cz>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Olof Johansson <olof@lixom.net>
2014-07-12 09:15:11 -07:00
Russell King cda390bb8f Merge branch 'kprobes-test-fixes' of git://git.linaro.org/people/tixy/kernel into fixes 2014-07-12 13:59:24 +01:00
Roger Quadros eb82a3d846 phy: omap-usb2: Balance pm_runtime_enable() on probe failure and remove
If probe fails then we need to call pm_runtime_disable() to balance
out the previous pm_runtime_enable() call. Else it will cause
unbalanced pm_runtime_enable() call in the succeding probe call.

This anomaly was observed when the call to devm_phy_create() failed
with -EPROBE_DEFER.

Balance out the pm_runtime_enable() call in .remove() as well.

Signed-off-by: Roger Quadros <rogerq@ti.com>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-07-11 18:23:50 -07:00
Roger Quadros e73b49f1c4 phy: core: Fix error path in phy_create()
Prevent resources from being freed twice in case device_add() call
fails within phy_create(). Also use ida_simple_remove() instead of
ida_remove() as we had used ida_simple_get() to allocate the ida.

Cc: 3.13+ <stable@vger.kernel.org> # 3.13+
Signed-off-by: Roger Quadros <rogerq@ti.com>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-07-11 18:23:49 -07:00
Sjoerd Simons bf5baf954a drivers: phy: phy-samsung-usb2.c: Add missing MODULE_DEVICE_TABLE
Allow phy-exynos-usb2 to be autoloaded based on devicetree information.
Tested on Odroid X2 with its USB subsystem build as modules.

Signed-off-by: Sjoerd Simons <sjoerd.simons@collabora.co.uk>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-07-11 18:23:49 -07:00
Himangi Saraogi 3df9fcd59f phy: omap-usb2: fix devm_ioremap_resource error detection code
devm_ioremap_resource returns an ERR_PTR value, not NULL, on failure.

A simplified version of the semantic match that finds this problem is as
follows:

// <smpl>
@@
expression e,e1;
statement S;
@@

*e = devm_ioremap_resource(...);
if (!e1) S

// </smpl>

Signed-off-by: Himangi Saraogi <himangi774@gmail.com>
Acked-by: Julia Lawall <julia.lawall@lip6.fr>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-07-11 18:23:49 -07:00
Maxime Ripard 9820ccba4b phy: sun4i: depend on RESET_CONTROLLER
The driver depend on the reset framework in a mandatory way. Make sure
reset_control_get is defined by adding this dependency in Kconfig

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Reported-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-07-11 18:23:49 -07:00
Michal Sojka d8279a40e5 USB: serial: ftdi_sio: Add Infineon Triboard
This adds support for Infineon TriBoard TC1798 [1]. Only interface 1
is used as serial line (see [2], Figure 8-6).

[1] http://www.infineon.com/cms/de/product/microcontroller/development-tools-software-and-kits/tricore-tm-development-tools-software-and-kits/starterkits-and-evaluation-boards/starter-kit-tc1798/channel.html?channel=db3a304333b8a7ca0133cfa3d73e4268
[2] http://www.infineon.com/dgdl/TriBoardManual-TC1798-V10.pdf?folderId=db3a304412b407950112b409ae7c0343&fileId=db3a304333b8a7ca0133cfae99fe426a

Signed-off-by: Michal Sojka <sojkam1@fel.cvut.cz>
Cc: Johan Hovold <johan@kernel.org>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-07-11 18:22:38 -07:00
Simon Horman 34c4eda809 serial: sh-sci: Add device tree support for r8a7{778,740,3a4} and sh73a0
Simply document new compat strings.
There appears to be no need for a driver updates.

Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-07-11 17:45:12 -07:00
Peter Hurley 8bec751bd6 serial: imx: Fix build breakage
Fix breakage introduced by
commit c557d392fb,
'serial: Test for no tx data on tx restart'.

Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-07-11 17:43:13 -07:00
Linus Torvalds 47ea8dd871 Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 fixes from Peter Anvin:
 "A couple of further build fixes for the VDSO code.

  This is turning into a bit of a headache, and Andy has already come up
  with a more ultimate cleanup, but most likely that is 3.17 material"

* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86-32, vdso: Fix vDSO build error due to missing align_vdso_addr()
  x86-64, vdso: Fix vDSO build breakage due to empty .rela.dyn
2014-07-11 17:10:05 -07:00
Linus Torvalds bae78dc259 Merge branch 'for-3.16' of git://linux-nfs.org/~bfields/linux
Pull nfsd bugfix from Bruce Fields:
 "Another xdr encoding regression that may cause incorrect encoding on
  failures of certain readdirs"

* 'for-3.16' of git://linux-nfs.org/~bfields/linux:
  nfsd: Fix bad reserving space for encoding rdattr_error
2014-07-11 15:10:04 -07:00
Linus Torvalds ef24209fb2 ARM64 implementation of TASK_SIZE_OF and exporting two functions to
modules.
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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:
 "ARM64 implementation of TASK_SIZE_OF and exporting two functions to
  modules"

* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
  arm64: implement TASK_SIZE_OF
  arm64: export __cpu_{clear,copy}_user_page functions
2014-07-11 15:09:15 -07:00
Theodore Ts'o f9ae9cf5d7 ext4: revert commit which was causing fs corruption after journal replays
Commit 007649375f ("ext4: initialize multi-block allocator before
checking block descriptors") causes the block group descriptor's count
of the number of free blocks to become inconsistent with the number of
free blocks in the allocation bitmap.  This is a harmless form of fs
corruption, but it causes the kernel to potentially remount the file
system read-only, or to panic, depending on the file systems's error
behavior.

Thanks to Eric Whitney for his tireless work to reproduce and to find
the guilty commit.

Fixes: 007649375f ("ext4: initialize multi-block allocator before checking block descriptors"

Cc: stable@vger.kernel.org  # 3.15
Reported-by: David Jander <david@protonic.nl>
Reported-by: Matteo Croce <technoboy85@gmail.com>
Tested-by: Eric Whitney <enwlinux@gmail.com>
Suggested-by: Eric Whitney <enwlinux@gmail.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2014-07-11 13:55:40 -04:00
Linus Torvalds 67b9d76f9e . Fix DM multipath IO hang regression from 3.15 due to logic bug in
multipath_busy.  This impacted cable-pull testing and also the ability
   to boot with IPR SCSI on a POWER8 box.
 
 . Fix possible deadlock with deferred device removal by using a new
   dedicated workqueue rather than using the system workqueue.
 
 . Fix NULL pointer crash due to race condition in dm-io's wake up code
   for sync_io by using a completion.
 
 . Update dm-crypt and dm-zero author name following legal name change;
   this is important to Jana so I didn't see any reason to hold it back.
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Merge tag 'dm-3.16-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm

Pull device mapper fixes from Mike Snitzer:

 - Fix DM multipath IO hang regression from 3.15 due to logic bug in
   multipath_busy.  This impacted cable-pull testing and also the
   ability to boot with IPR SCSI on a POWER8 box.

 - Fix possible deadlock with deferred device removal by using a new
   dedicated workqueue rather than using the system workqueue.

 - Fix NULL pointer crash due to race condition in dm-io's wake up code
   for sync_io by using a completion.

 - Update dm-crypt and dm-zero author name following legal name change;
   this is important to Jana so I didn't see any reason to hold it back.

* tag 'dm-3.16-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm:
  dm mpath: fix IO hang due to logic bug in multipath_busy
  dm io: fix a race condition in the wake up code for sync_io
  dm crypt, dm zero: update author name following legal name change
  dm: allocate a special workqueue for deferred device removal
2014-07-11 09:33:36 -07:00
Linus Torvalds c7c3ae2596 Merge branch 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc
Pull powerpc fixes from Ben Herrenschmidt:
 "Here are a few more powerpc fixes for 3.16

  There's a small series of 3 patches that fix saving/restoring MMUCR2
  when using KVM without which perf goes completely bonkers in the host
  system.  Another perf fix from Anton that's been rotting away in
  patchwork due to my poor eyesight, a couple of compile fixes, a little
  addition to the WSP removal by Michael (removing a bit more dead
  stuff) and a fix for an embarassing regression with our soft irq
  masking"

* 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc:
  powerpc/perf: Never program book3s PMCs with values >= 0x80000000
  powerpc: Disable RELOCATABLE for COMPILE_TEST with PPC64
  powerpc/perf: Clear MMCR2 when enabling PMU
  powerpc/perf: Add PPMU_ARCH_207S define
  powerpc/kvm: Remove redundant save of SIER AND MMCR2
  powerpc/powernv: Check for IRQHAPPENED before sleeping
  powerpc: Clean up MMU_FTRS_A2 and MMU_FTR_TYPE_3E
  powerpc/cell: Fix compilation with CONFIG_COREDUMP=n
2014-07-11 09:32:39 -07:00
Geert Uytterhoeven 5bc8c7cdeb m68k: Export mach_random_get_entropy to modules
When a module calls random_get_entropy():

    ERROR: "mach_random_get_entropy" [crypto/drbg.ko] undefined!
    make[1]: *** [__modpost] Error 1

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
2014-07-11 10:37:53 +02:00
Anton Blanchard f56029410a powerpc/perf: Never program book3s PMCs with values >= 0x80000000
We are seeing a lot of PMU warnings on POWER8:

    Can't find PMC that caused IRQ

Looking closer, the active PMC is 0 at this point and we took a PMU
exception on the transition from negative to 0. Some versions of POWER8
have an issue where they edge detect and not level detect PMC overflows.

A number of places program the PMC with (0x80000000 - period_left),
where period_left can be negative. We can either fix all of these or
just ensure that period_left is always >= 1.

This patch takes the second option.

Cc: <stable@vger.kernel.org>
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2014-07-11 13:50:47 +10:00
Linus Torvalds 85d90faed3 Merge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux
Pull drm fixes from Dave Airlie:
 "Nothing too scary, we have one outstanding i915 regression but Daniel
  has promised the fix as soon as he's finished testing it a bit.

  Fixes for the main x86 drivers:
   - radeon: dpm fixes, displayport regression fix
   - i915: quirks for backlight regression, edp reboot fix, valleyview
     black screen fixes
   - nouveau: display port regression fixes, fix for memory reclocking"

* 'drm-fixes' of git://people.freedesktop.org/~airlied/linux:
  drm/radeon/dpm: Reenabling SS on Cayman
  drm/radeon: fix typo in ci_stop_dpm()
  drm/radeon: fix typo in golden register setup on evergreen
  drm/radeon: only print meaningful VM faults
  drm/radeon/dp: return -EIO for flags not zero case
  drm/i915/vlv: T12 eDP panel timing enforcement during reboot
  drm/i915: Only unbind vgacon, not other console drivers
  drm/i915: Don't clobber the GTT when it's within stolen memory
  drm/i915/vlv: Update the DSI ULPS entry/exit sequence
  drm/i915/vlv: DPI FIFO empty check is not needed
  drm/i915: Toshiba CB35 has a controllable backlight
  drm/i915: Acer C720 and C720P have controllable backlights
  drm/i915: quirk asserts controllable backlight presence, overriding VBT
  drm/nouveau/ram: fix test for gpio presence
  drm/nouveau/dp: workaround broken display
  drm/nouveau/dp: fix required link bandwidth calculations
  drm/nouveau/kms: restore fbcon after display has been resumed
  drm/nv50-/kms: pass a non-zero value for head to sor dpms methods
  drm/nouveau/fb: Prevent inlining of ramfuc_reg
  drm/gk104/ram: bash mpll bit 31 on
2014-07-10 20:37:33 -07:00
Guenter Roeck fb43e8477e powerpc: Disable RELOCATABLE for COMPILE_TEST with PPC64
powerpc:allmodconfig has been failing for some time with the following
error.

arch/powerpc/kernel/exceptions-64s.S: Assembler messages:
arch/powerpc/kernel/exceptions-64s.S:1312: Error: attempt to move .org backwards
make[1]: *** [arch/powerpc/kernel/head_64.o] Error 1

A number of attempts to fix the problem by moving around code have been
unsuccessful and resulted in failed builds for some configurations and
the discovery of toolchain bugs.

Fix the problem by disabling RELOCATABLE for COMPILE_TEST builds instead.
While this is less than perfect, it avoids substantial code changes
which would otherwise be necessary just to make COMPILE_TEST builds
happy and might have undesired side effects.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2014-07-11 12:55:09 +10:00
Joel Stanley b50a6c584b powerpc/perf: Clear MMCR2 when enabling PMU
On POWER8 when switching to a KVM guest we set bits in MMCR2 to freeze
the PMU counters. Aside from on boot they are then never reset,
resulting in stuck perf counters for any user in the guest or host.

We now set MMCR2 to 0 whenever enabling the PMU, which provides a sane
state for perf to use the PMU counters under either the guest or the
host.

This was manifesting as a bug with ppc64_cpu --frequency:

    $ sudo ppc64_cpu --frequency
    WARNING: couldn't run on cpu 0
    WARNING: couldn't run on cpu 8
      ...
    WARNING: couldn't run on cpu 144
    WARNING: couldn't run on cpu 152
    min:    18446744073.710 GHz (cpu -1)
    max:    0.000 GHz (cpu -1)
    avg:    0.000 GHz

The command uses a perf counter to measure CPU cycles over a fixed
amount of time, in order to approximate the frequency of the machine.
The counters were returning zero once a guest was started, regardless of
weather it was still running or had been shut down.

By dumping the value of MMCR2, it was observed that once a guest is
running MMCR2 is set to 1s - which stops counters from running:

    $ sudo sh -c 'echo p > /proc/sysrq-trigger'
    CPU: 0 PMU registers, ppmu = POWER8 n_counters = 6
    PMC1:  5b635e38 PMC2: 00000000 PMC3: 00000000 PMC4: 00000000
    PMC5:  1bf5a646 PMC6: 5793d378 PMC7: deadbeef PMC8: deadbeef
    MMCR0: 0000000080000000 MMCR1: 000000001e000000 MMCRA: 0000040000000000
    MMCR2: fffffffffffffc00 EBBHR: 0000000000000000
    EBBRR: 0000000000000000 BESCR: 0000000000000000
    SIAR:  00000000000a51cc SDAR:  c00000000fc40000 SIER:  0000000001000000

This is done unconditionally in book3s_hv_interrupts.S upon entering the
guest, and the original value is only save/restored if the host has
indicated it was using the PMU. This is okay, however the user of the
PMU needs to ensure that it is in a defined state when it starts using
it.

Fixes: e05b9b9e5c ("powerpc/perf: Power8 PMU support")
Cc: stable@vger.kernel.org
Signed-off-by: Joel Stanley <joel@jms.id.au>
Acked-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2014-07-11 12:55:08 +10:00
Joel Stanley 4d9690dd56 powerpc/perf: Add PPMU_ARCH_207S define
Instead of separate bits for every POWER8 PMU feature, have a single one
for v2.07 of the architecture.

This saves us adding a MMCR2 define for a future patch.

Cc: stable@vger.kernel.org
Signed-off-by: Joel Stanley <joel@jms.id.au>
Acked-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2014-07-11 12:55:07 +10:00
Joel Stanley f73128f4f6 powerpc/kvm: Remove redundant save of SIER AND MMCR2
These two registers are already saved in the block above. Aside from
being unnecessary, by the time we get down to the second save location
r8 no longer contains MMCR2, so we are clobbering the saved value with
PMC5.

MMCR2 primarily consists of counter freeze bits. So restoring the value
of PMC5 into MMCR2 will most likely have the effect of freezing
counters.

Fixes: 72cde5a88d ("KVM: PPC: Book3S HV: Save/restore host PMU registers that are new in POWER8")
Cc: stable@vger.kernel.org
Signed-off-by: Joel Stanley <joel@jms.id.au>
Acked-by: Michael Ellerman <mpe@ellerman.id.au>
Acked-by: Paul Mackerras <paulus@samba.org>
Reviewed-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2014-07-11 12:55:07 +10:00
Preeti U Murthy c733cf83bb powerpc/powernv: Check for IRQHAPPENED before sleeping
Commit 8d6f7c5a: "powerpc/powernv: Make it possible to skip the IRQHAPPENED
check in power7_nap()" added code that prevents cpus from checking for
pending interrupts just before entering sleep state, which is wrong. These
interrupts are delivered during the soft irq disabled state of the cpu.

A cpu cannot enter any idle state with pending interrupts because they will
never be serviced until the next time the cpu is woken up by some other
interrupt. Its only then that the pending interrupts are replayed. This can result
in device timeouts or warnings about this cpu being stuck.

This patch fixes ths issue by ensuring that cpus check for pending interrupts
just before entering any idle state as long as they are not in the path of split
core operations.

Signed-off-by: Preeti U Murthy <preeti@linux.vnet.ibm.com>
Acked-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2014-07-11 12:55:06 +10:00
Michael Ellerman cd68098bce powerpc: Clean up MMU_FTRS_A2 and MMU_FTR_TYPE_3E
In fb5a515704 "powerpc: Remove platforms/wsp and associated pieces",
we removed the last user of MMU_FTRS_A2. So remove it.

MMU_FTRS_A2 was the last user of MMU_FTR_TYPE_3E, so remove it also.
This leaves some unreachable code in mmu_context_nohash.c, so remove
that also.

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2014-07-11 12:55:05 +10:00
Michael Ellerman e623fbf1c4 powerpc/cell: Fix compilation with CONFIG_COREDUMP=n
Commit 046d662f48 "coredump: make core dump functionality optional"
made the coredump optional, but didn't update the spufs code that
depends on it. That leads to build errors such as:

  arch/powerpc/platforms/built-in.o: In function `.spufs_arch_write_note':
  coredump.c:(.text+0x22cd4): undefined reference to `.dump_emit'
  coredump.c:(.text+0x22cf4): undefined reference to `.dump_emit'
  coredump.c:(.text+0x22d0c): undefined reference to `.dump_align'
  coredump.c:(.text+0x22d48): undefined reference to `.dump_emit'
  coredump.c:(.text+0x22e7c): undefined reference to `.dump_skip'

Fix it by adding some ifdefs in the cell code.

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2014-07-11 12:55:05 +10:00
Linus Torvalds fe5aa8a65b Merge branch 'rc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild
Pull kbuild fixes from Michal Marek:
 "Three more fixes for the relative build dir feature:

   - Shut up make -s again
   - Fix for rpm/deb/tar-pkg with O=<subdir>
   - Fix for CONFIG_EXTRA_FIRMWARE"

* 'rc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild:
  firmware: Create directories for external firmware
  kbuild: Fix packaging targets with relative $(srctree)
  kbuild: Do not print the build directory with make -s
2014-07-10 18:40:47 -07:00
Linus Torvalds b67db9d5e1 ACPI and power management fixes for 3.16-rc5
- Missing device ID for ACPI enumeration of PNP devices that we
    overlooked during the recent rework of that code from Zhang Rui.
 
  - Fix for a problem introduced during the 3.14 cycle in the ACPI
    device resources management code and causing it to reject all
    resources of length 0 although some of them are actually valid
    which affects serial ports detection on a number of systems.
    From Andy Whitcroft.
 
  - intel_pstate fix for a boot problem on some BayTrail-based
    systems introduced by a previous fix related to that platform
    during the 3.13 cycle from Dirk Brandewie.
 
  - Revert of a 3.13 commit that removed the ACPI AC /proc interface
    which turns out to be still needed by some old utilities (kpowersave
    from kde 3.5.10 in particular) from Lan Tianyu.
 
  - cpufreq build fix for the davinci ARM platform from Prabhakar Lad
    (the breakage was introduced during the 3.10 cycle).
 
  - ACPI-related i915 fix preventing firmware on some Thinkpad laptops
    from setting backlight levels incorrectly during AC plug/unplug.
    From Aaron Lu.
 
  - Fixes for two nasty race conditions in the ACPI embedded controller
    driver that may be responsible for a number of past bug reports
    related to the EC from Lv Zhang and a fix for two memory leaks in
    error code paths in that driver from Colin Ian King.
 
  - Fixes for a couple of corner-case issues in the intel_pstate
    driver (all candidates for -stable) from Dirk Brandewie and
    Vincent Minet.
 
  - Fixes for two corner-case issues in the ACPI battery driver
    from Josef Gajdusek and Lan Tianyu.
 
  - Two new ACPI video blacklist entries for Acer TravelMate B113
    and Dell Inspiron 5737 from Edward Lin and Martin Kepplinger.
 
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Merge tag 'pm+acpi-3.16-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull ACPI and power management fixes from Rafael Wysocki:
 "These are a few regression fixes for ACPI device enumeration and
  resources management, intel_pstate and cpufreq, a revert of an ACPI
  commit removing user space interfaces in /proc that we incorrectly
  thought were not used any more, fixes for some long-standing
  concurrency issues in the ACPI EC driver, two ACPI battery driver
  fixes, stable-candidate fixes for intel_pstate, an ACPI-related fix
  for i915 and two new ACPI video blacklist entries for Win8-oriented
  BIOSes.

  Specifics:

   - Missing device ID for ACPI enumeration of PNP devices that we
     overlooked during the recent rework of that code from Zhang Rui.

   - Fix for a problem introduced during the 3.14 cycle in the ACPI
     device resources management code and causing it to reject all
     resources of length 0 although some of them are actually valid
     which affects serial ports detection on a number of systems.  From
     Andy Whitcroft.

   - intel_pstate fix for a boot problem on some BayTrail-based systems
     introduced by a previous fix related to that platform during the
     3.13 cycle from Dirk Brandewie.

   - Revert of a 3.13 commit that removed the ACPI AC /proc interface
     which turns out to be still needed by some old utilities
     (kpowersave from kde 3.5.10 in particular) from Lan Tianyu.

   - cpufreq build fix for the davinci ARM platform from Prabhakar Lad
     (the breakage was introduced during the 3.10 cycle).

   - ACPI-related i915 fix preventing firmware on some Thinkpad laptops
     from setting backlight levels incorrectly during AC plug/unplug.
     From Aaron Lu.

   - Fixes for two nasty race conditions in the ACPI embedded controller
     driver that may be responsible for a number of past bug reports
     related to the EC from Lv Zhang and a fix for two memory leaks in
     error code paths in that driver from Colin Ian King.

   - Fixes for a couple of corner-case issues in the intel_pstate driver
     (all candidates for -stable) from Dirk Brandewie and Vincent Minet.

   - Fixes for two corner-case issues in the ACPI battery driver from
     Josef Gajdusek and Lan Tianyu.

   - Two new ACPI video blacklist entries for Acer TravelMate B113 and
     Dell Inspiron 5737 from Edward Lin and Martin Kepplinger"

* tag 'pm+acpi-3.16-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  ACPI / PNP: add soc_button_array device ID to PNP IDs list
  cpufreq: Makefile: fix compilation for davinci platform
  ACPI / video: Add Acer TravelMate B113 to native backlight blacklist
  ACPI / video: Add Dell Inspiron 5737 to the blacklist
  ACPI / i915: ignore firmware requests for backlight change
  ACPI / battery: fix wrong value of capacity_now reported when fully charged
  ACPI / resources: only reject zero length resources based at address zero
  ACPI / battery: Retry to get battery information if failed during probing
  ACPI / EC: Free saved_ec on error exit path
  ACPI / EC: Add detailed fields debugging support of EC_SC(R).
  ACPI / EC: Update revision due to recent changes
  ACPI / EC: Fix race condition in ec_transaction_completed()
  ACPI / EC: Remove duplicated ec_wait_ibf0() waiter
  ACPI / EC: Add asynchronous command byte write support
  ACPI / EC: Avoid race condition related to advance_transaction()
  intel_pstate: Set CPU number before accessing MSRs
  intel_pstate: Update documentation of {max,min}_perf_pct sysfs files
  intel_pstate: don't touch turbo bit if turbo disabled or unavailable.
  intel_pstate: Fix setting VID
  Revert "ACPI / AC: Remove AC's proc directory."
2014-07-10 18:36:30 -07:00
Dave Airlie bf38b025d3 Merge branch 'drm-fixes-3.16' of git://people.freedesktop.org/~agd5f/linux into drm-fixes
This new request drops the pageflipping fixes for now.  Just a few small
fixes for dpm, DP, and a fix for a hang on boot evergreen.

* 'drm-fixes-3.16' of git://people.freedesktop.org/~agd5f/linux:
  drm/radeon/dpm: Reenabling SS on Cayman
  drm/radeon: fix typo in ci_stop_dpm()
  drm/radeon: fix typo in golden register setup on evergreen
  drm/radeon: only print meaningful VM faults
  drm/radeon/dp: return -EIO for flags not zero case
2014-07-11 11:24:13 +10:00
Peter Hurley 99ecb001f5 serial: arc_uart: Use uart_circ_empty() for open-coded comparison
Replace open-coded test for empty tx ring buffer with equivalent
helper function, uart_circ_empty(). No functional change.

Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-07-10 16:31:34 -07:00
Peter Hurley c557d392fb serial: Test for no tx data on tx restart
Commit 717f3bbab3,
'serial_core: Fix conditional start_tx on ring buffer not empty'
exposes an incorrect assumption in several drivers' start_tx methods;
the tx ring buffer can, in fact, be empty when restarting tx while
performing flow control.

Affected drivers:
sunsab.c
ip22zilog.c
pmac_zilog.c
sunzilog.c
m32r_sio.c
imx.c

Other in-tree serial drivers either are not affected or already
test for empty tx ring buffer before transmitting.

Test for empty tx ring buffer in start_tx() method, after transmitting
x_char (if applicable).

Reported-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Cc: Seth Bollinger <sethb@digi.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Sam Ravnborg <sam@ravnborg.org>
Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Cc: stable <stable@vger.kernel.org> # 3.15
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-07-10 16:31:34 -07:00
Tomasz Figa bed7118988 ARM: EXYNOS: Register cpuidle device only on exynos4210 and 5250
Currently, the exynos cpuidle driver works correctly only on exynos4210
and 5250. Trying to use it with just one CPU online on any other exynos
SoCs will lead to system failure, due to unsupported AFTR mode on other
SoCs. This patch fixes the problem by registering the driver only on
supported SoCs and letting others simply use default WFI mode until
support for them is added.

Signed-off-by: Tomasz Figa <t.figa@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2014-07-11 08:15:32 +09:00
Jan Beulich d093601be5 x86-32, vdso: Fix vDSO build error due to missing align_vdso_addr()
Relying on static functions used just once to get inlined (and
subsequently have dead code paths eliminated) is wrong: Compilers are
free to decide whether they do this, regardless of optimization level.
With this not happening for vdso_addr() (observed with gcc 4.1.x), an
unresolved reference to align_vdso_addr() causes the build to fail.

[ hpa: vdso_addr() is never actually used on x86-32, as calculate_addr
  in map_vdso() is always false.  It ought to be possible to clean
  this up further, but this fixes the immediate problem. ]

Signed-off-by: Jan Beulich <jbeulich@suse.com>
Link: http://lkml.kernel.org/r/53B5863B02000078000204D5@mail.emea.novell.com
Acked-by: Andy Lutomirski <luto@amacapital.net>
Tested-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Tested-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2014-07-10 16:06:04 -07:00
Arun Kumar K cacaeb8293 ARM: dts: Add clock property for mfc_pd in exynos5420
Adding the optional clock property for the mfc_pd for
handling the re-parenting while pd on/off.

Signed-off-by: Arun Kumar K <arun.kk@samsung.com>
Signed-off-by: Shaik Ameer Basha <shaik.ameer@samsung.com>
Reviewed-by: Tomasz Figa <t.figa@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2014-07-11 08:04:03 +09:00
Arun Kumar K c0fb262bf2 clk: exynos5420: Add IDs for clocks used in PD mfc
Adds IDs for MUX clocks to be used by power domain for MFC
for doing re-parenting while pd on/off.

Signed-off-by: Arun Kumar K <arun.kk@samsung.com>
Signed-off-by: Shaik Ameer Basha <shaik.ameer@samsung.com>
Acked-by: Tomasz Figa <t.figa@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2014-07-11 08:03:59 +09:00
Prathyush K c760569d0e ARM: EXYNOS: Add support for clock handling in power domain
While powering on/off a local powerdomain in exynos5 chipsets, the
input clocks to each device gets modified. This behaviour is based
on the SYSCLK_SYS_PWR_REG registers.
E.g. SYSCLK_MFC_SYS_PWR_REG = 0x0, the parent of input clock to MFC
                             (aclk333) gets modified to oscclk
                            = 0x1, no change in clocks.
The recommended value of SYSCLK_SYS_PWR_REG before power gating any
domain is 0x0. So we must also restore the clocks while powering on
a domain everytime.

This patch adds the framework for getting the required mux and parent
clocks through a power domain device node. With this patch, while
powering off a domain, parent is set to oscclk and while powering back
on, its re-set to the correct parent which is as per the recommended
pd on/off sequence.

Signed-off-by: Prathyush K <prathyush.k@samsung.com>
Signed-off-by: Andrew Bresticker <abrestic@chromium.org>
Signed-off-by: Arun Kumar K <arun.kk@samsung.com>
Signed-off-by: Shaik Ameer Basha <shaik.ameer@samsung.com>
Reviewed-by: Tomasz Figa <t.figa@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2014-07-11 08:03:19 +09:00
Jan Beulich 9f88b906b4 x86-64, vdso: Fix vDSO build breakage due to empty .rela.dyn
Certain ld versions (observed with 2.20.0) put an empty .rela.dyn
section into shared object files, breaking the assumption on the number
of sections to be copied to the final output. Simply discard any empty
SHT_REL and SHT_RELA sections to address this.

Signed-off-by: Jan Beulich <jbeulich@suse.com>
Link: http://lkml.kernel.org/r/53B5861E02000078000204D1@mail.emea.novell.com
Acked-by: Andy Lutomirski <luto@amacapital.net>
Tested-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Tested-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2014-07-10 15:59:56 -07:00
Alexandre Demers 41959341ac drm/radeon/dpm: Reenabling SS on Cayman
It reverts commit c745fe611c now that
Cayman is stable since VDDCI fix. Spread spectrum was not the culprit.

This depends on b0880e87c1
(drm/radeon/dpm: fix vddci setup typo on cayman).

Signed-off-by: Alexandre Demers <alexandre.f.demers@gmail.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
2014-07-10 17:01:30 -04:00
Alex Deucher ed96377132 drm/radeon: fix typo in ci_stop_dpm()
Need to use the RREG32_SMC() accessor since the register
is an smc indirect index.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
2014-07-10 17:01:30 -04:00
Alex Deucher 6abafb78f9 drm/radeon: fix typo in golden register setup on evergreen
Fixes hangs on driver load on some cards.

bug:
https://bugs.freedesktop.org/show_bug.cgi?id=76998

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
2014-07-10 17:01:29 -04:00
Christian König 9b7d786b90 drm/radeon: only print meaningful VM faults
Signed-off-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2014-07-10 17:01:28 -04:00
Alex Deucher f6be5e6450 drm/radeon/dp: return -EIO for flags not zero case
If there are error flags in the aux transaction return
-EIO rather than -EBUSY.  -EIO restarts the whole transaction
while -EBUSY jus retries.  Fixes problematic aux transfers.

Bug:
https://bugs.freedesktop.org/show_bug.cgi?id=80684

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
2014-07-10 17:01:28 -04:00
Olof Johansson c58a27a49a Fixes for omaps for the -rc series. It's mostly fixes for clock rates,
restart handling and phy regulators and SATA interconnect data.
 
 Also few build fixes related to the DSP driver in staging, and trivial
 stuff like removal of broken and soon to be unused platform data init
 for HDMI audio that would be good to get into the -rc series if not
 too late.
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Merge tag 'omap-for-v3.16/fixes-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap into fixes

Merge "omap fixes against v3.16-rc4" from Tony Lindgren:

Fixes for omaps for the -rc series. It's mostly fixes for clock rates,
restart handling and phy regulators and SATA interconnect data.

Also few build fixes related to the DSP driver in staging, and trivial
stuff like removal of broken and soon to be unused platform data init
for HDMI audio that would be good to get into the -rc series if not
too late.

* tag 'omap-for-v3.16/fixes-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap:
  ARM: OMAP2+: Remove non working OMAP HDMI audio initialization
  ARM: dts: Fix TI CPSW Phy mode selection on IGEP COM AQUILA.
  ARM: dts: am335x-evmsk: Enable the McASP FIFO for audio
  ARM: dts: am335x-evm: Enable the McASP FIFO for audio
  ARM: OMAP2+: Make GPMC skip disabled devices
  ARM: OMAP2+: create dsp device only on OMAP3 SoCs
  ARM: dts: dra7-evm: Make VDDA_1V8_PHY supply always on
  ARM: DRA7/AM43XX: fix header definition for omap44xx_restart
  ARM: OMAP2+: clock/dpll: fix _dpll_test_fint arithmetics overflow
  ARM: DRA7: hwmod: Add SYSCONFIG for usb_otg_ss
  ARM: DRA7: hwmod: Fixup SATA hwmod
  ARM: OMAP3: PRM/CM: Add back macros used by TI DSP/Bridge driver
  ARM: dts: dra7xx-clocks: Fix the l3 and l4 clock rates

Signed-off-by: Olof Johansson <olof@lixom.net>
2014-07-10 13:47:51 -07:00
Jun'ichi Nomura 7a7a3b45fe dm mpath: fix IO hang due to logic bug in multipath_busy
Commit e80991773 ("dm mpath: push back requests instead of queueing")
modified multipath_busy() to return true if !pg_ready().  pg_ready()
checks the current state of the multipath device and may return false
even if a new IO is needed to change the state.

Bart Van Assche reported that he had multipath IO lockup when he was
performing cable pull tests.  Analysis showed that the multipath
device had a single path group with both paths active, but that the
path group itself was not active.  During the multipath device state
transitions 'queue_io' got set but nothing could clear it.  Clearing
'queue_io' only happens in __choose_pgpath(), but it won't be called
if multipath_busy() returns true due to pg_ready() returning false
when 'queue_io' is set.

As such the !pg_ready() check in multipath_busy() is wrong because new
IO will not be sent to multipath target and the multipath state change
won't happen.  That results in multipath IO lockup.

The intent of multipath_busy() is to avoid unnecessary cycles of
dequeue + request_fn + requeue if it is known that the multipath
device will requeue.

Such "busy" situations would be:
  - path group is being activated
  - there is no path and the multipath is setup to requeue if no path

Fix multipath_busy() to return "busy" early only for these specific
situations.

Reported-by: Bart Van Assche <bvanassche@acm.org>
Tested-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Jun'ichi Nomura <j-nomura@ce.jp.nec.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Cc: stable@vger.kernel.org # v3.15
2014-07-10 16:44:15 -04:00
Joe Thornber 10f1d5d111 dm io: fix a race condition in the wake up code for sync_io
There's a race condition between the atomic_dec_and_test(&io->count)
in dec_count() and the waking of the sync_io() thread.  If the thread
is spuriously woken immediately after the decrement it may exit,
making the on stack io struct invalid, yet the dec_count could still
be using it.

Fix this race by using a completion in sync_io() and dec_count().

Reported-by: Minfei Huang <huangminfei@ucloud.cn>
Signed-off-by: Joe Thornber <thornber@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Acked-by: Mikulas Patocka <mpatocka@redhat.com>
Cc: stable@vger.kernel.org
2014-07-10 16:44:14 -04:00
Jana Saout bf14299f1c dm crypt, dm zero: update author name following legal name change
Signed-off-by: Jana Saout <jana@saout.de>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
2014-07-10 16:44:14 -04:00
Mikulas Patocka acfe0ad74d dm: allocate a special workqueue for deferred device removal
The commit 2c140a246d ("dm: allow remove to be deferred") introduced a
deferred removal feature for the device mapper.  When this feature is
used (by passing a flag DM_DEFERRED_REMOVE to DM_DEV_REMOVE_CMD ioctl)
and the user tries to remove a device that is currently in use, the
device will be removed automatically in the future when the last user
closes it.

Device mapper used the system workqueue to perform deferred removals.
However, some targets (dm-raid1, dm-mpath, dm-stripe) flush work items
scheduled for the system workqueue from their destructor.  If the
destructor itself is called from the system workqueue during deferred
removal, it introduces a possible deadlock - the workqueue tries to flush
itself.

Fix this possible deadlock by introducing a new workqueue for deferred
removals.  We allocate just one workqueue for all dm targets.  The
ability of dm targets to process IOs isn't dependent on deferred removal
of unused targets, so a deadlock due to shared workqueue isn't possible.

Also, cleanup local_init() to eliminate potential for returning success
on failure.

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Cc: stable@vger.kernel.org # 3.13+
2014-07-10 16:44:13 -04:00
Masanari Iida be11e6d860 Documentation: Docbook: Fix files location change of kernel/[hr]timer.c
make xmldocs failed because of file location change
from kernel/[hr]timer.c to kernel/time/[hr]timer.c.

Signed-off-by: Masanari Iida <standby24x7@gmail.com>
Cc: john.stultz@linaro.org
Cc: rdunlap@infradead.org
Link: http://lkml.kernel.org/r/1405017830-31194-1-git-send-email-standby24x7@gmail.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2014-07-10 22:21:06 +02:00