1. 06 Oct, 2013 3 commits
  2. 05 Oct, 2013 2 commits
    • Tejun Heo's avatar
      sysfs: remove sysfs_buffer->needs_read_fill · aea585ef
      Tejun Heo authored
      
      
      ->needs_read_fill is used to implement the following behaviors.
      
      1. Ensure buffer filling on the first read.
      2. Force buffer filling after a write.
      3. Force buffer filling after a successful poll.
      
      However, #2 and #3 don't really work as sysfs doesn't reset file
      position.  While the read buffer would be refilled, the next read
      would continue from the position after the last read or write,
      requiring an explicit seek to the start for it to be useful, which
      makes ->needs_read_fill superflous as read buffer is always refilled
      if f_pos == 0.
      
      Update sysfs_read_file() to test buffer->page for #1 instead and
      remove ->needs_read_fill.  While this changes behavior in extreme
      corner cases - e.g. re-reading a sysfs file after seeking to non-zero
      position after a write or poll, it's highly unlikely to lead to actual
      breakage.  This change is to prepare for using seq_file in the read
      path.
      
      While at it, reformat a comment in fill_write_buffer().
      Signed-off-by: default avatarTejun Heo <tj@kernel.org>
      Cc: Kay Sievers <kay@vrfy.org>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      aea585ef
    • Tejun Heo's avatar
      89e51dab
  3. 03 Oct, 2013 5 commits
    • Tejun Heo's avatar
      sysfs: introduce [__]sysfs_remove() · 250f7c3f
      Tejun Heo authored
      
      
      Given a sysfs_dirent, there is no reason to have multiple versions of
      removal functions.  A function which removes the specified
      sysfs_dirent and its descendants is enough.
      
      This patch intorduces [__}sysfs_remove() which replaces all internal
      variations of removal functions.  This will be the only removal
      function in the planned new sysfs_dirent based interface.
      Signed-off-by: default avatarTejun Heo <tj@kernel.org>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      250f7c3f
    • Tejun Heo's avatar
      sysfs: make __sysfs_remove_dir() recursive · bcdde7e2
      Tejun Heo authored
      
      
      Currently, sysfs directory removal is inconsistent in that it would
      remove any files directly under it but wouldn't recurse into
      directories.  Thanks to group subdirectories, this doesn't even match
      with kobject boundaries.  sysfs is in the process of being separated
      out so that it can be used by multiple subsystems and we want to have
      a consistent behavior - either removal of a sysfs_dirent should remove
      every descendant entries or none instead of something inbetween.
      
      This patch implements proper recursive removal in
      __sysfs_remove_dir().  The function now walks its subtree in a
      post-order walk to remove all descendants.
      
      This is a behavior change but kobject / driver layer, which currently
      is the only consumer, has already been updated to handle duplicate
      removal attempts, so nothing should be broken after this change.
      Signed-off-by: default avatarTejun Heo <tj@kernel.org>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      bcdde7e2
    • Tejun Heo's avatar
      kobject: grab an extra reference on kobject->sd to allow duplicate deletes · 26ea12de
      Tejun Heo authored
      
      
      sysfs currently has a rather weird behavior regarding removals.  A
      directory removal would delete all files directly under it but
      wouldn't recurse into subdirectories, which, while a bit inconsistent,
      seems to make sense at the first glance as each directory is
      supposedly associated with a kobject and each kobject can take care of
      the directory deletion; however, this doesn't really hold as we have
      groups which can be directories without a kobject associated with it
      and require explicit deletions.
      
      We're in the process of separating out sysfs from kboject / driver
      core and want a consistent behavior.  A removal should delete either
      only the specified node or everything under it.  I think it is helpful
      to support recursive atomic removal and later patches will implement
      it.
      
      Such change means that a sysfs_dirent associated with kobject may be
      deleted before the kobject itself is removed if one of its ancestor
      gets removed before it.  As sysfs_remove_dir() puts the base ref, we
      may end up with dangling pointer on descendants.  This can be solved
      by holding an extra reference on the sd from kobject.
      
      Acquire an extra reference on the associated sysfs_dirent on directory
      creation and put it after removal.
      Signed-off-by: default avatarTejun Heo <tj@kernel.org>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      26ea12de
    • Tejun Heo's avatar
      sysfs: remove sysfs_addrm_cxt->parent_sd · d69ac5a0
      Tejun Heo authored
      
      
      sysfs_addrm_start/finish() enclose sysfs_dirent additions and
      deletions and sysfs_addrm_cxt is used to record information necessary
      to finish the operations.  Currently, sysfs_addrm_start() takes
      @parent_sd, records it in sysfs_addrm_cxt, and assumes that all
      operations in the block are performed under that @parent_sd.
      
      This assumption has been fine until now but we want to make some
      operations behave recursively and, while having @parent_sd recorded in
      sysfs_addrm_cxt doesn't necessarily prevents that, it becomes
      confusing.
      
      This patch removes sysfs_addrm_cxt->parent_sd and makes
      sysfs_add_one() take an explicit @parent_sd parameter.  Note that
      sysfs_remove_one() doesn't need the extra argument as its parent is
      always known from the target @sd.
      
      While at it, add __acquires/releases() notations to
      sysfs_addrm_start/finish() respectively.
      
      This patch doesn't make any functional difference.
      Signed-off-by: default avatarTejun Heo <tj@kernel.org>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      d69ac5a0
    • Weijie Yang's avatar
      fs/debugfs: add declaration for no CONFIG_DEBUG_FS · 5b880214
      Weijie Yang authored
      
      
      Two function declarations are absence if not define CONFIG_DEBUG_FS
      in include/linux/debugfs.h
      Signed-off-by: default avatarWeijie Yang <weijie.yang@samsung.com>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      5b880214
  4. 30 Sep, 2013 1 commit
  5. 29 Sep, 2013 10 commits
    • Linus Torvalds's avatar
      Linux 3.12-rc3 · 15c03dd4
      Linus Torvalds authored
      15c03dd4
    • Linus Torvalds's avatar
      Merge tag 'usb-3.12-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb · 30ceb4ec
      Linus Torvalds authored
      Pull USB fixes from Greg KH:
       "Here are a number of USB driver fixes for 3.12-rc3.
      
        These are all for host controller issues that have been reported, and
        there's a fix for an annoying error message that gets printed every
        time you remove a USB 3 device from the system that's been bugging me
        for a while"
      
      * tag 'usb-3.12-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb:
        usb: dwc3: add support for Merrifield
        USB: fsl/ehci: fix failure of checking PHY_CLK_VALID during reinitialization
        USB: Fix breakage in ffs_fs_mount()
        fsl/usb: Resolve PHY_CLK_VLD instability issue for ULPI phy
        usb/core/devio.c: Don't reject control message to endpoint with wrong direction bit
        usb: chipidea: USB_CHIPIDEA should depend on HAS_DMA
        usb: chipidea: udc: free pending TD at removal procedure
        usb: chipidea: imx: Add usb_phy_shutdown at probe's error path
        usb: chipidea: Fix memleak for ci->hw_bank.regmap when removal
        usb: chipidea: udc: fix the oops after rmmod gadget
        USB: fix PM config symbol in uhci-hcd, ehci-hcd, and xhci-hcd
        USB: OHCI: accept very late isochronous URBs
        USB: UHCI: accept very late isochronous URBs
        USB: iMX21: accept very late isochronous URBs
        usbcore: check usb device's state before sending a Set SEL control transfer
        xhci: Fix race between ep halt and URB cancellation
        usb: Fix xHCI host issues on remote wakeup.
        xhci: Ensure a command structure points to the correct trb on the command ring
        xhci: Fix oops happening after address device timeout
      30ceb4ec
    • Linus Torvalds's avatar
      Merge tag 'tty-3.12-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty · 26c019fc
      Linus Torvalds authored
      Pull tty/serial fixes from Greg KH:
       "Here are some serial at tty driver fixes for 3.12-rc3
      
        The serial driver fixes some kref leaks, documentation is moved to the
        proper places, and the tty and n_tty fixes resolve some reported
        regressions.  There is still one outstanding tty regression fix that
        isn't in here yet, as I want to test it out some more, it will be sent
        for 3.12-rc4 if it checks out"
      
      * tag 'tty-3.12-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty:
        tty: ar933x_uart: move devicetree binding documentation
        tty: Fix SIGTTOU not sent with tcflush()
        n_tty: Fix EOF push index when termios changes
        serial: pch_uart: remove unnecessary tty_port_tty_get
        serial: pch_uart: fix tty-kref leak in dma-rx path
        serial: pch_uart: fix tty-kref leak in rx-error path
        serial: tegra: fix tty-kref leak
      26c019fc
    • Linus Torvalds's avatar
      Merge tag 'staging-3.12-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging · 31795c40
      Linus Torvalds authored
      Pull staging fixes from Greg KH:
       "Here are some staging driver fixes, MAINTAINER updates, and a new
        device id.  All of these have been in the linux-next tree, and are
        pretty simple patches"
      
      * tag 'staging-3.12-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging:
        staging: r8188eu: Add new device ID
        staging: imx-drm: Fix probe failure
        staging: vt6656: [BUG] iwctl_siwencodeext return if device not open
        staging: vt6656: [BUG] main_usb.c oops on device_close move flag earlier.
        staging: vt6656: rxtx.c [BUG] s_vGetFreeContext dead lock on null apTD.
        Staging: rtl8192u: r819xU_cmdpkt: checking NULL value after doing dev_alloc_skb
        staging: usbip: Orphan usbip
        staging: r8188eu: Add files for new drive: Cocci spatch "noderef"
        staging: r8188eu: Cocci spatch "noderef"
        staging: octeon-usb: Cocci spatch "noderef"
        staging: r8188eu: Add files for new drive: Cocci spatch "noderef"
        MAINTAINERS: staging: dgnc and dgap drivers: add maintainer
        staging: lustre: Cocci spatch "noderef"
      31795c40
    • Linus Torvalds's avatar
      Merge tag 'driver-core-3.12-rc3' of... · 434ac47d
      Linus Torvalds authored
      Merge tag 'driver-core-3.12-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core
      
      Pull driver core / sysfs fixes from Greg KH:
       "Here are 2 fixes for 3.12-rc3.  One fixes a sysfs problem with
        mounting caused by 3.12-rc1, and the other is a bug reported by the
        chromeos developers with the driver core.
      
        Both have been in linux-next for a bit"
      
      * tag 'driver-core-3.12-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core:
        driver core : Fix use after free of dev->parent in device_shutdown
        sysfs: Allow mounting without CONFIG_NET
      434ac47d
    • Linus Torvalds's avatar
      Merge tag 'char-misc-3.12-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc · c23c2234
      Linus Torvalds authored
      Pull char/misc driver fixes from Greg KH:
       "Here are some HyperV and MEI driver fixes for 3.12-rc3.  They resolve
        some issues that people have been reporting for them"
      
      * tag 'char-misc-3.12-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc:
        Drivers: hv: vmbus: Terminate vmbus version negotiation on timeout
        Drivers: hv: util: Correctly support ws2008R2 and earlier
        mei: cancel stall timers in mei_reset
        mei: bus: stop wait for read during cl state transition
        mei: make me client counters less error prone
      c23c2234
    • Linus Torvalds's avatar
      Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · cac66535
      Linus Torvalds authored
      Pull perf revert from Ingo Molnar:
       "This fixes the 'perf top' regression Markus Trippelsdorf reported"
      
      * 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        Revert "perf symbols: Demangle cloned functions"
      cac66535
    • Linus Torvalds's avatar
      Merge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux · b97b869a
      Linus Torvalds authored
      Pull drm fixes from Dave Airlie:
       "Nothing too major, radeon still has some dpm changes for off by
        default.
      
        Radeon, intel, msm:
         - radeon: a few more dpm fixes (still off by default), uvd fixes
         - i915: runtime warn backtrace and regression fix
         - msm: iommu changes fallout"
      
      * 'drm-fixes' of git://people.freedesktop.org/~airlied/linux: (27 commits)
        drm/msm: use drm_gem_dumb_destroy helper
        drm/msm: deal with mach/iommu.h removal
        drm/msm: Remove iommu include from mdp4_kms.c
        drm/msm: Odd PTR_ERR usage
        drm/i915: Fix up usage of SHRINK_STOP
        drm/radeon: fix hdmi audio on DCE3.0/3.1 asics
        drm/i915: preserve pipe A quirk in i9xx_set_pipeconf
        drm/i915/tv: clear adjusted_mode.flags
        drm/i915/dp: increase i2c-over-aux retry interval on AUX DEFER
        drm/radeon/cik: fix overflow in vram fetch
        drm/radeon: add missing hdmi callbacks for rv6xx
        drm/i915: Use a temporary va_list for two-pass string handling
        drm/radeon/uvd: lower msg&fb buffer requirements on UVD3
        drm/radeon: disable tests/benchmarks if accel is disabled
        drm/radeon: don't set default clocks for SI when DPM is disabled
        drm/radeon/dpm/ci: filter clocks based on voltage/clk dep tables
        drm/radeon/dpm/si: filter clocks based on voltage/clk dep tables
        drm/radeon/dpm/ni: filter clocks based on voltage/clk dep tables
        drm/radeon/dpm/btc: filter clocks based on voltage/clk dep tables
        drm/radeon/dpm: fetch the max clk from voltage dep tables helper
        ...
      b97b869a
    • Ingo Molnar's avatar
      Revert "perf symbols: Demangle cloned functions" · 14951f22
      Ingo Molnar authored
      This reverts commit de95ab53
      
      .
      
      Markus Trippelsdorf reported that this commit broke 'perf top':
      
       > I just see a gray screen with no text at all. Sometimes the
       > following error messages are printed:
       >
       >  *** Error in `perf': invalid fastbin entry (free): 0x00000000029b18c0
       >  ***
       >  *** Error in `perf': malloc(): memory corruption (fast): 0x0000000000ee0b10 ***
      
      While this code is fixable, the commit itself fails on several levels:
      
       - it should have been a separate helper function
       - why the heck does it do strchr() twice
       - it casts a const char * over into char *
       - sloppy style
       - it's not even a regression fix!
      
      So lets revert it and re-try the patch in v3.13.
      Reported-by: default avatarMarkus Trippelsdorf <markus@trippelsdorf.de>
      Cc: Andi Kleen <ak@linux.intel.com>
      Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
      Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
      Cc: Linus Torvalds <torvalds@linux-foundation.org>
      Signed-off-by: default avatarIngo Molnar <mingo@kernel.org>
      14951f22
    • Dave Airlie's avatar
      Merge branch 'msm-fixes-3.12-rc2' of git://people.freedesktop.org/~robclark/linux into drm-fixes · 66544179
      Dave Airlie authored
      A small fix + deal with fallout of iommu changes + use new
      drm_gem_dumb_destroy helper.
      
      * 'msm-fixes-3.12-rc2' of git://people.freedesktop.org/~robclark/linux:
        drm/msm: use drm_gem_dumb_destroy helper
        drm/msm: deal with mach/iommu.h removal
        drm/msm: Remove iommu include from mdp4_kms.c
        drm/msm: Odd PTR_ERR usage
      66544179
  6. 28 Sep, 2013 19 commits