1. 03 Apr, 2013 2 commits
  2. 02 Apr, 2013 3 commits
    • James Hogan's avatar
      clk: fix clk_mux::flags kerneldoc · 3566d40c
      James Hogan authored
      The kerneldoc comment for struct clk_mux documented the non-existent
      num_clks instead of flags. Correct this.
      Signed-off-by: default avatarJames Hogan <james.hogan@imgtec.com>
      Signed-off-by: default avatarMike Turquette <mturquette@linaro.org>
      3566d40c
    • Mike Turquette's avatar
      clk: allow reentrant calls into the clk framework · 533ddeb1
      Mike Turquette authored
      Reentrancy into the clock framework is necessary for clock operations
      that result in nested calls to the clk api.  A common example is a clock
      that is prepared via an i2c transaction, such as a clock inside of a
      discrete audio chip or a power management IC.  The i2c subsystem itself
      will use the clk api resulting in a deadlock:
      
      clk_prepare(audio_clk)
      	i2c_transfer(..)
      		clk_prepare(i2c_controller_clk)
      
      The ability to reenter the clock framework prevents this deadlock.
      
      Other use cases exist such as allowing .set_rate callbacks to call
      clk_set_parent to achieve the best rate, or to save power in certain
      configurations.  Yet another example is performing pinctrl operations
      from a clk_ops callback.  Calls into the pinctrl subsystem may call
      clk_{un}prepare on an unrelated clock.  Allowing for nested calls to
      reenter the clock framework enables both of these use cases.
      
      Reentrancy is implemented by two global pointers that track the owner
      currently holding a global lock.  One pointer tracks the owner during
      sleepable, mutex-protected operations and the other one tracks the owner
      during non-interruptible, spinlock-protected operations.
      
      When the clk framework is entered we try to hold the global lock.  If it
      is held we compare the current task against the current owner; a match
      implies a nested call and we reenter.  If the values do not match then
      we block on the lock until it is released.
      Signed-off-by: default avatarMike Turquette <mturquette@linaro.org>
      Cc: Rajagopal Venkat <rajagopal.venkat@linaro.org>
      Cc: David Brown <davidb@codeaurora.org>
      Tested-by: default avatarLaurent Pinchart <laurent.pinchart@ideasonboard.com>
      Reviewed-by: default avatarThomas Gleixner <tglx@linutronix.de>
      Reviewed-by: default avatarUlf Hansson <ulf.hansson@linaro.org>
      533ddeb1
    • Mike Turquette's avatar
      clk: abstract locking out into helper functions · eab89f69
      Mike Turquette authored
      Create locking helpers for the global mutex and global spinlock.  The
      definitions of these helpers will be expanded upon in the next patch
      which introduces reentrancy into the locking scheme.
      Signed-off-by: default avatarMike Turquette <mturquette@linaro.org>
      Cc: Rajagopal Venkat <rajagopal.venkat@linaro.org>
      Cc: David Brown <davidb@codeaurora.org>
      Tested-by: default avatarLaurent Pinchart <laurent.pinchart@ideasonboard.com>
      Reviewed-by: default avatarThomas Gleixner <tglx@linutronix.de>
      Reviewed-by: default avatarUlf Hansson <ulf.hansson@linaro.org>
      eab89f69
  3. 27 Mar, 2013 6 commits
  4. 26 Mar, 2013 1 commit
    • Prashant Gaikwad's avatar
      clk: Add composite clock type · ece70094
      Prashant Gaikwad authored
      Not all clocks are required to be decomposed into basic clock
      types but at the same time want to use the functionality
      provided by these basic clock types instead of duplicating.
      
      For example, Tegra SoC has ~100 clocks which can be decomposed
      into Mux -> Div -> Gate clock types making the clock count to
      ~300. Also, parent change operation can not be performed on gate
      clock which forces to use mux clock in driver if want to change
      the parent.
      
      Instead aggregate the basic clock types functionality into one
      clock and just use this clock for all operations. This clock
      type re-uses the functionality of basic clock types and not
      limited to basic clock types but any hardware-specific
      implementation.
      Signed-off-by: default avatarPrashant Gaikwad <pgaikwad@nvidia.com>
      Signed-off-by: default avatarMike Turquette <mturquette@linaro.org>
      ece70094
  5. 22 Mar, 2013 3 commits
  6. 21 Mar, 2013 2 commits
  7. 20 Mar, 2013 1 commit
  8. 19 Mar, 2013 5 commits
  9. 17 Mar, 2013 4 commits
    • Linus Torvalds's avatar
      Linux 3.9-rc3 · a937536b
      Linus Torvalds authored
      a937536b
    • David Rientjes's avatar
      perf,x86: fix link failure for non-Intel configs · 6c4d3bc9
      David Rientjes authored
      Commit 1d9d8639 ("perf,x86: fix kernel crash with PEBS/BTS after
      suspend/resume") introduces a link failure since
      perf_restore_debug_store() is only defined for CONFIG_CPU_SUP_INTEL:
      
      	arch/x86/power/built-in.o: In function `restore_processor_state':
      	(.text+0x45c): undefined reference to `perf_restore_debug_store'
      
      Fix it by defining the dummy function appropriately.
      Signed-off-by: default avatarDavid Rientjes <rientjes@google.com>
      Cc: stable@vger.kernel.org
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      6c4d3bc9
    • Linus Torvalds's avatar
      perf,x86: fix wrmsr_on_cpu() warning on suspend/resume · 2a6e06b2
      Linus Torvalds authored
      Commit 1d9d8639 ("perf,x86: fix kernel crash with PEBS/BTS after
      suspend/resume") fixed a crash when doing PEBS performance profiling
      after resuming, but in using init_debug_store_on_cpu() to restore the
      DS_AREA mtrr it also resulted in a new WARN_ON() triggering.
      
      init_debug_store_on_cpu() uses "wrmsr_on_cpu()", which in turn uses CPU
      cross-calls to do the MSR update.  Which is not really valid at the
      early resume stage, and the warning is quite reasonable.  Now, it all
      happens to _work_, for the simple reason that smp_call_function_single()
      ends up just doing the call directly on the CPU when the CPU number
      matches, but we really should just do the wrmsr() directly instead.
      
      This duplicates the wrmsr() logic, but hopefully we can just remove the
      wrmsr_on_cpu() version eventually.
      Reported-and-tested-by: default avatarParag Warudkar <parag.lkml@gmail.com>
      Cc: stable@vger.kernel.org
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      2a6e06b2
    • Linus Torvalds's avatar
      Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs · 08637024
      Linus Torvalds authored
      Pull btrfs fixes from Chris Mason:
       "Eric's rcu barrier patch fixes a long standing problem with our
        unmount code hanging on to devices in workqueue helpers.  Liu Bo
        nailed down a difficult assertion for in-memory extent mappings."
      
      * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs:
        Btrfs: fix warning of free_extent_map
        Btrfs: fix warning when creating snapshots
        Btrfs: return as soon as possible when edquot happens
        Btrfs: return EIO if we have extent tree corruption
        btrfs: use rcu_barrier() to wait for bdev puts at unmount
        Btrfs: remove btrfs_try_spin_lock
        Btrfs: get better concurrency for snapshot-aware defrag work
      08637024
  10. 16 Mar, 2013 8 commits
    • Liu Bo's avatar
      Btrfs: fix warning of free_extent_map · 3b277594
      Liu Bo authored
      Users report that an extent map's list is still linked when it's actually
      going to be freed from cache.
      
      The story is that
      
      a) when we're going to drop an extent map and may split this large one into
      smaller ems, and if this large one is flagged as EXTENT_FLAG_LOGGING which means
      that it's on the list to be logged, then the smaller ems split from it will also
      be flagged as EXTENT_FLAG_LOGGING, and this is _not_ expected.
      
      b) we'll keep ems from unlinking the list and freeing when they are flagged with
      EXTENT_FLAG_LOGGING, because the log code holds one reference.
      
      The end result is the warning, but the truth is that we set the flag
      EXTENT_FLAG_LOGGING only during fsync.
      
      So clear flag EXTENT_FLAG_LOGGING for extent maps split from a large one.
      Reported-by: default avatarJohannes Hirte <johannes.hirte@fem.tu-ilmenau.de>
      Reported-by: default avatarDarrick J. Wong <darrick.wong@oracle.com>
      Signed-off-by: default avatarLiu Bo <bo.li.liu@oracle.com>
      Signed-off-by: default avatarChris Mason <chris.mason@fusionio.com>
      3b277594
    • Linus Torvalds's avatar
      Merge branch 'kbuild' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild · e2043785
      Linus Torvalds authored
      Pull kbuild fix from Michal Marek:
       "One fix for for make headers_install/headers_check to not require make
        3.81.  The requirement has been accidentally introduced in 3.7."
      
      * 'kbuild' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild:
        kbuild: fix make headers_check with make 3.80
      e2043785
    • Linus Torvalds's avatar
      Merge tag 'for-3.9-rc3' of git://openrisc.net/jonas/linux · 23659587
      Linus Torvalds authored
      Pull OpenRISC bug fixes from Jonas Bonn:
      
       - The GPIO descriptor work has exposed how broken the non-GPIOLIB bits
         for OpenRISC were.  We now require GPIOLIB as this is the preferred
         way forward.
      
       - The system.h split introduced a bug in llist.h for arches using
         asm-generic/cmpxchg.h directly, which is currently only OpenRISC.
         The patch here moves two defines from asm-generic/atomic.h to
         asm-generic/cmpxchg.h to make things work as they should.
      
       - The VIRT_TO_BUS selector was added for OpenRISC, but OpenRISC does
         not have the virt_to_bus methods, so there's a patch to remove it
         again.
      
      * tag 'for-3.9-rc3' of git://openrisc.net/jonas/linux:
        openrisc: remove HAVE_VIRT_TO_BUS
        asm-generic: move cmpxchg*_local defs to cmpxchg.h
        openrisc: require gpiolib
      23659587
    • Linus Torvalds's avatar
      Merge tag 'char-misc-3.9-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc · 9e1a0aab
      Linus Torvalds authored
      Pull char/misc fixes from Greg Kroah-Hartman:
       "Here are some tiny fixes for the w1 drivers and the final removal
        patch for getting rid of CONFIG_EXPERIMENTAL (all users of it are now
        gone from your tree, this just drops the Kconfig item itself.)
      
        All have been in the linux-next tree for a while"
      
      * tag 'char-misc-3.9-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc:
        final removal of CONFIG_EXPERIMENTAL
        w1: fix oops when w1_search is called from netlink connector
        w1-gpio: fix unused variable warning
        w1-gpio: remove erroneous __exit and __exit_p()
        ARM: w1-gpio: fix erroneous gpio requests
      9e1a0aab
    • Linus Torvalds's avatar
      Merge tag 'sound-3.9' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound · 5cd8846c
      Linus Torvalds authored
      Pull sound fixes from Takashi Iwai:
       "A collection of small fixes, as expected for the middle rc:
         - A couple of fixes for potential NULL dereferences and out-of-range
           array accesses revealed by static code parsers
         - A fix for the wrong error handling detected by trinity
         - A regression fix for missing audio on some MacBooks
         - CA0132 DSP loader fixes
         - Fix for EAPD control of IDT codecs on machines w/o speaker
         - Fix a regression in the HD-audio widget list parser code
         - Workaround for the NuForce UDH-100 USB audio"
      
      * tag 'sound-3.9' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
        ALSA: hda - Fix missing EAPD/GPIO setup for Cirrus codecs
        sound: sequencer: cap array index in seq_chn_common_event()
        ALSA: hda/ca0132 - Remove extra setting of dsp_state.
        ALSA: hda/ca0132 - Check download state of DSP.
        ALSA: hda/ca0132 - Check if dspload_image succeeded.
        ALSA: hda - Disable IDT eapd_switch if there are no internal speakers
        ALSA: hda - Fix snd_hda_get_num_raw_conns() to return a correct value
        ALSA: usb-audio: add a workaround for the NuForce UDH-100
        ALSA: asihpi - fix potential NULL pointer dereference
        ALSA: seq: Fix missing error handling in snd_seq_timer_open()
      5cd8846c
    • Linus Torvalds's avatar
      Merge branch 'fixes-for-3.9' of git://git.linaro.org/people/mszyprowski/linux-dma-mapping · c7f17deb
      Linus Torvalds authored
      Pull DMA-mapping fix from Marek Szyprowski:
       "An important fix for all ARM architectures which use ZONE_DMA.
        Without it dma_alloc_* calls with GFP_ATOMIC flag might have allocated
        buffers outsize DMA zone."
      
      * 'fixes-for-3.9' of git://git.linaro.org/people/mszyprowski/linux-dma-mapping:
        ARM: DMA-mapping: add missing GFP_DMA flag for atomic buffer allocation
      c7f17deb
    • Linus Torvalds's avatar
      Merge tag 'mfd-fixes-3.9-1' of git://git.kernel.org/pub/scm/linux/kernel/git/sameo/mfd-fixes · de1893f6
      Linus Torvalds authored
      Pull MFD fixes from Samuel Ortiz:
       "This is the first batch of MFD fixes for 3.9.
      
        With this one we have:
      
         - An ab8500 build failure fix.
         - An ab8500 device tree parsing fix.
         - A fix for twl4030_madc remove routine to work properly (when
           built-in).
         - A fix for properly registering palmas interrupt handler.
         - A fix for omap-usb init routine to actually write into the
           hostconfig register.
         - A couple of warning fixes for ab8500-gpadc and tps65912"
      
      * tag 'mfd-fixes-3.9-1' of git://git.kernel.org/pub/scm/linux/kernel/git/sameo/mfd-fixes:
        mfd: twl4030-madc: Remove __exit_p annotation
        mfd: ab8500: Kill "reg" property from binding
        mfd: ab8500-gpadc: Complain if we fail to enable vtvout LDO
        mfd: wm831x: Don't forward declare enum wm831x_auxadc
        mfd: twl4030-audio: Fix argument type for twl4030_audio_disable_resource()
        mfd: tps65912: Declare and use tps65912_irq_exit()
        mfd: palmas: Provide irq flags through DT/platform data
        mfd: Make AB8500_CORE select POWER_SUPPLY to fix build error
        mfd: omap-usb-host: Actually update hostconfig
      de1893f6
    • Linus Torvalds's avatar
      Merge tag 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging · 92fbb1c9
      Linus Torvalds authored
      Pull hwmon fixes from Guenter Roeck:
       "Bug fixes for pmbus, ltc2978, and lineage-pem drivers
      
        Added specific maintainer for some hwmon drivers"
      
      * tag 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging:
        hwmon: (pmbus/ltc2978) Fix temperature reporting
        hwmon: (pmbus) Fix krealloc() misuse in pmbus_add_attribute()
        hwmon: (lineage-pem) Add missing terminating entry for pem_[input|fan]_attributes
        MAINTAINERS: Add maintainer for MAX6697, INA209, and INA2XX drivers
      92fbb1c9
  11. 15 Mar, 2013 5 commits