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Commits on May 26, 2010
  1. @gregkh


    gregkh authored
  2. @herbertx @gregkh

    crypto: authenc - Add EINPROGRESS check

    herbertx authored gregkh committed
    commit 180ce7e upstream.
    When Steffen originally wrote the authenc async hash patch, he
    correctly had EINPROGRESS checks in place so that we did not invoke
    the original completion handler with it.
    Unfortuantely I told him to remove it before the patch was applied.
    As only MAY_BACKLOG request completion handlers are required to
    handle EINPROGRESS completions, those checks are really needed.
    This patch restores them.
    Reported-by: Sebastian Andrzej Siewior <>
    Signed-off-by: Herbert Xu <>
    Signed-off-by: Greg Kroah-Hartman <>
  3. @gregkh

    Revert "ath9k: fix lockdep warning when unloading module" on stable k…

    Luis R. Rodriguez authored gregkh committed
    Johannes' patch 34e8950 titled:
    	mac80211: allow station add/remove to sleep
    changed the way mac80211 adds and removes peers. The new
    sta_add() / sta_remove() callbacks allowed the driver callbacks
    to sleep. Johannes also ported ath9k to use sta_add() / sta_remove()
    via the patch 4ca7786 titled:
    	ath9k: convert to new station add/remove callbacks
    but this patch forgot to address a change in locking issue which
    Ming Lei eventually found on his 2.6.33-wl #12 build. The 2.6.33-wl
    build includes code for the 802.11 subsystem for 2.6.34 though so did
    already have the above two patches (ath9k_sta_remove() on his trace),
    the 2.6.33 kernel did not however have these two patches. Ming eventually
    cured his lockdep warnign via the patch a9f042c titled:
    	ath9k: fix lockdep warning when unloading module
    This went in to 2.6.34 and although it was not marked as a stable
    fix it did get trickled down and applied on both 2.6.33 and 2.6.32.
    In review, the culprits:
    	mac80211: allow station add/remove to sleep
    git describe --contains 34e8950
    	ath9k: convert to new station add/remove callbacks
    git describe --contains 4ca7786
    	ath9k: fix lockdep warning when unloading module
    This last one trickled down to 2.6.33 (OK), 2.6.33 (invalid) and 2.6.32 (invalid).
    git describe --contains a9f042c
    git describe --contains 0524bcf
    git describe --contains 0dcc998
    The patch titled "ath9k: fix lockdep warning when unloading module"
    should be reverted on both 2.6.33 and 2.6.32 as it is invalid and
    actually ended up causing the following warning:
    ADDRCONF(NETDEV_CHANGE): wlan31: link becomes ready
    phy0: WMM queue=2 aci=0 acm=0 aifs=3 cWmin=15 cWmax=1023 txop=0
    phy0: WMM queue=3 aci=1 acm=0 aifs=7 cWmin=15 cWmax=1023 txop=0
    phy0: WMM queue=1 aci=2 acm=0 aifs=2 cWmin=7 cWmax=15 txop=94
    phy0: WMM queue=0 aci=3 acm=0 aifs=2 cWmin=3 cWmax=7 txop=47
    phy0: device now idle
    ------------[ cut here ]------------
    WARNING: at kernel/softirq.c:143 local_bh_enable_ip+0x7b/0xa0()
    Hardware name: 7660A14
    Modules linked in: ath9k(-) mac80211 ath cfg80211 <whatever-bleh-etc>
    Pid: 2003, comm: rmmod Not tainted #6
    Call Trace:
     [<ffffffff8105d178>] warn_slowpath_common+0x78/0xb0
     [<ffffffff8105d1bf>] warn_slowpath_null+0xf/0x20
     [<ffffffff81063f8b>] local_bh_enable_ip+0x7b/0xa0
     [<ffffffff815121e4>] _spin_unlock_bh+0x14/0x20
     [<ffffffffa034aea5>] ath_tx_node_cleanup+0x185/0x1b0 [ath9k]
     [<ffffffffa0345597>] ath9k_sta_notify+0x57/0xb0 [ath9k]
     [<ffffffffa02ac51a>] __sta_info_unlink+0x15a/0x260 [mac80211]
     [<ffffffffa02ac658>] sta_info_unlink+0x38/0x60 [mac80211]
     [<ffffffffa02b3fbe>] ieee80211_set_disassoc+0x1ae/0x210 [mac80211]
     [<ffffffffa02b42d9>] ieee80211_mgd_deauth+0x109/0x110 [mac80211]
     [<ffffffffa02ba409>] ieee80211_deauth+0x19/0x20 [mac80211]
     [<ffffffffa028160e>] __cfg80211_mlme_deauth+0xee/0x130 [cfg80211]
     [<ffffffff81118540>] ? init_object+0x50/0x90
     [<ffffffffa0285429>] __cfg80211_disconnect+0x159/0x1d0 [cfg80211]
     [<ffffffffa027125f>] cfg80211_netdev_notifier_call+0x10f/0x450 [cfg80211]
     [<ffffffff81514ca7>] notifier_call_chain+0x47/0x90
     [<ffffffff8107f501>] raw_notifier_call_chain+0x11/0x20
     [<ffffffff81442d66>] call_netdevice_notifiers+0x16/0x20
     [<ffffffff8144352d>] dev_close+0x4d/0xa0
     [<ffffffff814439a8>] rollback_registered+0x48/0x120
     [<ffffffff81443a9d>] unregister_netdevice+0x1d/0x70
     [<ffffffffa02b6cc4>] ieee80211_remove_interfaces+0x84/0xc0 [mac80211]
     [<ffffffffa02aa072>] ieee80211_unregister_hw+0x42/0xf0 [mac80211]
     [<ffffffffa0347bde>] ath_detach+0x8e/0x180 [ath9k]
     [<ffffffffa0347ce1>] ath_cleanup+0x11/0x50 [ath9k]
     [<ffffffffa0351a2c>] ath_pci_remove+0x1c/0x20 [ath9k]
     [<ffffffff8129d712>] pci_device_remove+0x32/0x60
     [<ffffffff81332373>] __device_release_driver+0x53/0xb0
     [<ffffffff81332498>] driver_detach+0xc8/0xd0
     [<ffffffff81331405>] bus_remove_driver+0x85/0xe0
     [<ffffffff81332a5a>] driver_unregister+0x5a/0x90
     [<ffffffff8129da00>] pci_unregister_driver+0x40/0xb0
     [<ffffffffa03518d0>] ath_pci_exit+0x10/0x20 [ath9k]
     [<ffffffffa0353cd5>] ath9k_exit+0x9/0x2a [ath9k]
     [<ffffffff81092838>] sys_delete_module+0x1a8/0x270
     [<ffffffff8107ebe9>] ? up_read+0x9/0x10
     [<ffffffff81011f82>] system_call_fastpath+0x16/0x1b
    ---[ end trace fad957019ffdd40b ]---
    phy0: Removed STA 00:22:6b:56:fd:e8
    phy0: Destroyed STA 00:22:6b:56:fd:e8
    wlan31: deauthenticating from 00:22:6b:56:fd:e8 by local choice (reason=3)
    ath9k 0000:16:00.0: PCI INT A disabled
    The original lockdep fixed an issue where due to the new changes
    the driver was not disabling the bottom halves but it is incorrect
    to do this on the older kernels since IRQs are already disabled.
    Cc: Ming Lei <>
    Cc: Johannes Berg <>
    Cc: John W. Linville <>
    Signed-off-by: Luis R. Rodriguez <>
    Signed-off-by: Greg Kroah-Hartman <>
  4. @konis @gregkh

    nilfs2: fix sync silent failure

    konis authored gregkh committed
    commit 973bec3 upstream.
    As of 32a88aa, __sync_filesystem() will return 0 if s_bdi is not set.
    And nilfs does not set s_bdi anywhere.  I noticed this problem by the
    warning introduced by the recent commit 5129a46 ("Catch filesystem
    lacking s_bdi").
     WARNING: at fs/super.c:959 vfs_kern_mount+0xc5/0x14e()
     Hardware name: PowerEdge 2850
     Modules linked in: nilfs2 loop tpm_tis tpm tpm_bios video shpchp pci_hotplug output dcdbas
     Pid: 3773, comm: mount.nilfs2 Not tainted 2.6.34-rc6-debug #38
     Call Trace:
      [<c1028422>] warn_slowpath_common+0x60/0x90
      [<c102845f>] warn_slowpath_null+0xd/0x10
      [<c1095936>] vfs_kern_mount+0xc5/0x14e
      [<c1095a03>] do_kern_mount+0x32/0xbd
      [<c10a811e>] do_mount+0x671/0x6d0
      [<c1073794>] ? __get_free_pages+0x1f/0x21
      [<c10a684f>] ? copy_mount_options+0x2b/0xe2
      [<c107b634>] ? strndup_user+0x48/0x67
      [<c10a81de>] sys_mount+0x61/0x8f
      [<c100280c>] sysenter_do_call+0x12/0x32
    This ensures to set s_bdi for nilfs and fixes the sync silent failure.
    Signed-off-by: Ryusuke Konishi <>
    Acked-by: Jens Axboe <>
    Signed-off-by: Linus Torvalds <>
    Signed-off-by: Greg Kroah-Hartman <>
  5. @gregkh

    mmap_min_addr check CAP_SYS_RAWIO only for write

    Kees Cook authored gregkh committed
    commit 4ae69e6 upstream.
    Redirecting directly to lsm, here's the patch discussed on lkml:
    The mmap_min_addr value is useful information for an admin to see without
    being root ("is my system vulnerable to kernel NULL pointer attacks?") and
    its setting is trivially easy for an attacker to determine by calling
    mmap() in PAGE_SIZE increments starting at 0, so trying to keep it private
    has no value.
    Only require CAP_SYS_RAWIO if changing the value, not reading it.
    Comment from Serge :
      Me, I like to write my passwords with light blue pen on dark blue
      paper, pasted on my window - if you're going to get my password, you're
      gonna get a headache.
    Signed-off-by: Kees Cook <>
    Acked-by: Serge Hallyn <>
    Signed-off-by: James Morris <>
    (cherry picked from commit 822ccee)
    Signed-off-by: Greg Kroah-Hartman <>
  6. @gregkh

    CacheFiles: Fix error handling in cachefiles_determine_cache_security()

    David Howells authored gregkh committed
    commit 7ac512a upstream.
    cachefiles_determine_cache_security() is expected to return with a
    security override in place.  However, if set_create_files_as() fails, we
    fail to do this.  In this case, we should just reinstate the security
    override that was set by the caller.
    Furthermore, if set_create_files_as() fails, we should dispose of the
    new credentials we were in the process of creating.
    Signed-off-by: David Howells <>
    Signed-off-by: Linus Torvalds <>
    Signed-off-by: Greg Kroah-Hartman <>
  7. @gregkh

    iwlwifi: clear all the stop_queue flag after load firmware

    Wey-Yi Guy authored gregkh committed
    commit a9e10fb upstream.
    All the queues are awake and ready to use after loading firmware,
    for firmware reload case, if any queues was stopped before
    reload, mac80211 will wake those queues after restart hardware, so make
    sure all the flag used to keep track of the queue status are
    reset correctly.
    Signed-off-by: Wey-Yi Guy <>
    Signed-off-by: Reinette Chatre <>
    Signed-off-by: Greg Kroah-Hartman <>
  8. @gregkh

    iwlwifi: check for aggregation frame and queue

    Wey-Yi Guy authored gregkh committed
    commit 45d4270 upstream.
    Error checking for aggregation frames should go into aggregation queue,
    if aggregation queue not available, use legacy queue instead.
    Also make sure the aggregation queue is available to activate,
    if driver and mac80211 is out-of-sync, try to disable the queue and
    sync-up with mac80211.
    Signed-off-by: Wey-Yi Guy <>
    Signed-off-by: Reinette Chatre <>
    Signed-off-by: Greg Kroah-Hartman <>
  9. @Sarvatt @gregkh

    drm/i915: Disable FBC on 915GM and 945GM.

    Sarvatt authored gregkh committed
    commit 8d06a1e upstream.
    It is causing hangs after a suspend/resume cycle with the default
    powersave=1 module option on these chipsets since 2.6.32-rc.
    Signed-off-by: Robert Hooker <>
    Acked-by: Jesse Barnes <>
    Signed-off-by: Eric Anholt <>
    Signed-off-by: Greg Kroah-Hartman <>
  10. @gregkh

    ALSA: hda - New Intel HDA controller

    Vitaliy Kulikov authored gregkh committed
    commit c602c8a upstream.
    Added a PCI controller id on new Dell laptops.
    Signed-off-by: Vitaliy Kulikov <>
    Cc: AmenophisIII <>
    Signed-off-by: Takashi Iwai <>
    Signed-off-by: Greg Kroah-Hartman <>
  11. @djrbliss @gregkh

    Btrfs: check for read permission on src file in the clone ioctl

    djrbliss authored gregkh committed
    commit 5dc6416 upstream.
    The existing code would have allowed you to clone a file that was
    only open for writing
    Signed-off-by: Chris Mason <>
    Signed-off-by: Greg Kroah-Hartman <>
  12. @reasand @gregkh

    x86, amd: Check X86_FEATURE_OSVW bit before accessing OSVW MSRs

    reasand authored gregkh committed
    commit f014871 upstream.
    If host CPU is exposed to a guest the OSVW MSRs are not guaranteed
    to be present and a GP fault occurs. Thus checking the feature flag is
    Signed-off-by: Andreas Herrmann <>
    LKML-Reference: <>
    Signed-off-by: H. Peter Anvin <>
    Signed-off-by: Greg Kroah-Hartman <>
  13. @gregkh

    x86, cacheinfo: Turn off L3 cache index disable feature in virtualize…

    Frank Arnold authored gregkh committed
    …d environments
    commit 7f284d3 upstream.
    When running a quest kernel on xen we get:
    BUG: unable to handle kernel NULL pointer dereference at 0000000000000038
    IP: [<ffffffff8142f2fb>] cpuid4_cache_lookup_regs+0x2ca/0x3df
    PGD 0
    Oops: 0000 [#1] SMP
    last sysfs file:
    CPU 0
    Modules linked in:
    Pid: 0, comm: swapper Tainted: G        W  2.6.34-rc3 #1 /HVM domU
    RIP: 0010:[<ffffffff8142f2fb>]  [<ffffffff8142f2fb>] cpuid4_cache_lookup_regs+0x
    RSP: 0018:ffff880002203e08  EFLAGS: 00010046
    RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000060
    RDX: 0000000000000000 RSI: 0000000000000040 RDI: 0000000000000000
    RBP: ffff880002203ed8 R08: 00000000000017c0 R09: ffff880002203e38
    R10: ffff8800023d5d40 R11: ffffffff81a01e28 R12: ffff880187e6f5c0
    R13: ffff880002203e34 R14: ffff880002203e58 R15: ffff880002203e68
    FS:  0000000000000000(0000) GS:ffff880002200000(0000) knlGS:0000000000000000
    CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
    CR2: 0000000000000038 CR3: 0000000001a3c000 CR4: 00000000000006f0
    DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
    DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
    Process swapper (pid: 0, threadinfo ffffffff81a00000, task ffffffff81a44020)
     ffffffff810d7ecb ffff880002203e20 ffffffff81059140 ffff880002203e30
    <0> ffffffff810d7ec9 0000000002203e40 000000000050d140 ffff880002203e70
    <0> 0000000002008140 0000000000000086 ffff880040020140 ffffffff81068b8b
    Call Trace:
     [<ffffffff810d7ecb>] ? sync_supers_timer_fn+0x0/0x1c
     [<ffffffff81059140>] ? mod_timer+0x23/0x25
     [<ffffffff810d7ec9>] ? arm_supers_timer+0x34/0x36
     [<ffffffff81068b8b>] ? hrtimer_get_next_event+0xa7/0xc3
     [<ffffffff81058e85>] ? get_next_timer_interrupt+0x19a/0x20d
     [<ffffffff8142fa23>] get_cpu_leaves+0x5c/0x232
     [<ffffffff8106a7b1>] ? sched_clock_local+0x1c/0x82
     [<ffffffff8106a9a0>] ? sched_clock_tick+0x75/0x7a
     [<ffffffff8107748c>] generic_smp_call_function_single_interrupt+0xae/0xd0
     [<ffffffff8101f6ef>] smp_call_function_single_interrupt+0x18/0x27
     [<ffffffff8100a773>] call_function_single_interrupt+0x13/0x20
     [<ffffffff8143c468>] ? notifier_call_chain+0x14/0x63
     [<ffffffff810295c6>] ? native_safe_halt+0xc/0xd
     [<ffffffff810114eb>] ? default_idle+0x36/0x53
     [<ffffffff81008c22>] cpu_idle+0xaa/0xe4
     [<ffffffff81423a9a>] rest_init+0x7e/0x80
     [<ffffffff81b10dd2>] start_kernel+0x40e/0x419
     [<ffffffff81b102c8>] x86_64_start_reservations+0xb3/0xb7
     [<ffffffff81b103c4>] x86_64_start_kernel+0xf8/0x107
    Code: 14 d5 40 ff ae 81 8b 14 02 31 c0 3b 15 47 1c 8b 00 7d 0e 48 8b 05 36 1c 8b
     00 48 63 d2 48 8b 04 d0 c7 85 5c ff ff ff 00 00 00 00 <8b> 70 38 48 8d 8d 5c ff
     ff ff 48 8b 78 10 ba c4 01 00 00 e8 eb
    RIP  [<ffffffff8142f2fb>] cpuid4_cache_lookup_regs+0x2ca/0x3df
     RSP <ffff880002203e08>
    CR2: 0000000000000038
    ---[ end trace a7919e7f17c0a726 ]---
    The L3 cache index disable feature of AMD CPUs has to be disabled if the
    kernel is running as guest on top of a hypervisor because northbridge
    devices are not available to the guest. Currently, this fixes a boot
    crash on top of Xen. In the future this will become an issue on KVM as
    Check if northbridge devices are present and do not enable the feature
    if there are none.
    [ hpa: backported to 2.6.34 ]
    Signed-off-by: Frank Arnold <>
    LKML-Reference: <>
    Acked-by: Borislav Petkov <>
    Signed-off-by: H. Peter Anvin <>
    Signed-off-by: Greg Kroah-Hartman <>
  14. @gregkh

    x86, k8: Fix build error when K8_NB is disabled

    Borislav Petkov authored gregkh committed
    commit ade029e upstream.
    K8_NB depends on PCI and when the last is disabled (allnoconfig) we fail
    at the final linking stage due to missing exported num_k8_northbridges.
    Add a header stub for that.
    Signed-off-by: Borislav Petkov <>
    LKML-Reference: <20100503183036.GJ26107@aftab>
    Signed-off-by: H. Peter Anvin <>
    Signed-off-by: Greg Kroah-Hartman <>
  15. @gregkh

    profile: fix stats and data leakage

    Hugh Dickins authored gregkh committed
    commit 16a2164 upstream.
    If the kernel is large or the profiling step small, /proc/profile
    leaks data and readprofile shows silly stats, until readprofile -r
    has reset the buffer: clear the prof_buffer when it is vmalloc()ed.
    Signed-off-by: Hugh Dickins <>
    Signed-off-by: Linus Torvalds <>
    Signed-off-by: Greg Kroah-Hartman <>
  16. @xemul @gregkh

    inotify: don't leak user struct on inotify release

    xemul authored gregkh committed
    commit b3b38d8 upstream.
    inotify_new_group() receives a get_uid-ed user_struct and saves the
    reference on group->inotify_data.user.  The problem is that free_uid() is
    never called on it.
    Issue seem to be introduced by 63c882a (inotify: reimplement inotify
    using fsnotify) after 2.6.30.
    Signed-off-by: Pavel Emelyanov <>
    Eric Paris <>
    Signed-off-by: Andrew Morton <>
    Signed-off-by: Eric Paris <>
    Signed-off-by: Greg Kroah-Hartman <>
  17. @eparis @gregkh

    inotify: race use after free/double free in inotify inode marks

    eparis authored gregkh committed
    commit e087334 upstream.
    There is a race in the inotify add/rm watch code.  A task can find and
    remove a mark which doesn't have all of it's references.  This can
    result in a use after free/double free situation.
    Task A					Task B
    ------------				-----------
     allocate a mark (refcnt == 1)
     add it to the idr
    					      refcnt hits 0, free
     take reference because we are on idr
     [at this point it is a use after free]
     [time goes on]
     refcnt may hit 0 again, double free
    The fix is to take the reference BEFORE the object can be found in the
    Signed-off-by: Eric Paris <>
    Signed-off-by: Greg Kroah-Hartman <>
  18. @crimsun @gregkh

    ALSA: hda: Fix 0 dB for Lenovo models using Conexant CX20549 (Venice)

    crimsun authored gregkh committed
    commit 0ebf9e3 upstream.
    As reported on the mailing list, we also need to cap to the 0 dB offset
    for Lenovo models, else the sound will be distorted.
    Reported-and-Tested-by: Tim Starling <>
    Signed-off-by: Daniel T Chen <>
    Signed-off-by: Takashi Iwai <>
    Signed-off-by: Greg Kroah-Hartman <>
  19. @cladisch @gregkh

    ALSA: virtuoso: fix Xonar D1/DX front panel microphone

    cladisch authored gregkh committed
    commit 6a45f78 upstream.
    Commit 65c3ac8 in 2.6.33 accidentally
    left out the initialization of the AC97 codec FMIC2MIC bit, which broke
    recording from the front panel microphone.
    Signed-off-by: Clemens Ladisch <>
    Signed-off-by: Jaroslav Kysela <>
    Signed-off-by: Takashi Iwai <>
    Signed-off-by: Greg Kroah-Hartman <>
  20. @tiwai @gregkh

    ALSA: ice1724 - Fix ESI Maya44 capture source control

    tiwai authored gregkh committed
    commit 8213466 upstream.
    The capture source control of maya44 was wrongly coded with the bit
    shift instead of the bit mask.  Also, the slot for line-in was
    wrongly assigned (slot 5 instead of 4).
    Reported-by: Alex Chernyshoff <>
    Signed-off-by: Takashi Iwai <>
    Signed-off-by: Greg Kroah-Hartman <>
  21. @gregkh

    tty: Fix unbalanced BKL handling in error path

    Alan Cox authored gregkh committed
    commit 77945fe upstream.
    Arnd noted:
    After the "retry_open:" label, we first get the tty_mutex
    and then the BKL. However a the end of tty_open, we jump
    back to retry_open with the BKL still held. If we run into
    this case, the tty_open function will be left with the BKL
    still held.
    Signed-off-by: Alan Cox <>
    Acked-by: Arnd Bergmann <>
    Signed-off-by: Greg Kroah-Hartman <>
  22. @gregkh

    serial: imx.c: fix CTS trigger level lower to avoid lost chars

    Valentin Longchamp authored gregkh committed
    commit 1c5250d upstream.
    The imx CTS trigger level is left at its reset value that is 32
    chars. Since the RX FIFO has 32 entries, when CTS is raised, the
    FIFO already is full. However, some serial port devices first empty
    their TX FIFO before stopping when CTS is raised, resulting in lost
    This patch sets the trigger level lower so that other chars arrive
    after CTS is raised, there is still room for 16 of them.
    Signed-off-by: Valentin Longchamp<>
    Tested-by: Philippe Rétornaz<>
    Acked-by: Wolfram Sang<>
    Signed-off-by: Greg Kroah-Hartman <>
  23. @gregkh

    cifs: guard against hardlinking directories

    Jeff Layton authored gregkh committed
    commit 3d69438 upstream.
    When we made serverino the default, we trusted that the field sent by the
    server in the "uniqueid" field was actually unique. It turns out that it
    isn't reliably so.
    Samba, in particular, will just put the st_ino in the uniqueid field when
    unix extensions are enabled. When a share spans multiple filesystems, it's
    quite possible that there will be collisions. This is a server bug, but
    when the inodes in question are a directory (as is often the case) and
    there is a collision with the root inode of the mount, the result is a
    kernel panic on umount.
    Fix this by checking explicitly for directory inodes with the same
    uniqueid. If that is the case, then we can assume that using server inode
    numbers will be a problem and that they should be disabled.
    Fixes Samba bugzilla 7407
    Signed-off-by: Jeff Layton <>
    Reviewed-and-Tested-by: Suresh Jayaraman <>
    Signed-off-by: Steve French <>
    Signed-off-by: Greg Kroah-Hartman <>
  24. @paulusmack @gregkh

    powerpc/perf_event: Fix oops due to perf_event_do_pending call

    paulusmack authored gregkh committed
    commit 0fe1ac4 upstream.
    Anton Blanchard found that large POWER systems would occasionally
    crash in the exception exit path when profiling with perf_events.
    The symptom was that an interrupt would occur late in the exit path
    when the MSR[RI] (recoverable interrupt) bit was clear.  Interrupts
    should be hard-disabled at this point but they were enabled.  Because
    the interrupt was not recoverable the system panicked.
    The reason is that the exception exit path was calling
    perf_event_do_pending after hard-disabling interrupts, and
    perf_event_do_pending will re-enable interrupts.
    The simplest and cleanest fix for this is to use the same mechanism
    that 32-bit powerpc does, namely to cause a self-IPI by setting the
    decrementer to 1.  This means we can remove the tests in the exception
    exit path and raw_local_irq_restore.
    This also makes sure that the call to perf_event_do_pending from
    timer_interrupt() happens within irq_enter/irq_exit.  (Note that
    calling perf_event_do_pending from timer_interrupt does not mean that
    there is a possible 1/HZ latency; setting the decrementer to 1 ensures
    that the timer interrupt will happen immediately, i.e. within one
    timebase tick, which is a few nanoseconds or 10s of nanoseconds.)
    Signed-off-by: Paul Mackerras <>
    Signed-off-by: Benjamin Herrenschmidt <>
    Signed-off-by: Greg Kroah-Hartman <>
  25. @gregkh

    dasd: fix race between tasklet and dasd_sleep_on

    Stefan Weinhuber authored gregkh committed
    commit 1c1e093 upstream.
    The various dasd_sleep_on functions use a global wait queue when
    waiting for a cqr. The wait condition checks the status and devlist
    fields of the cqr to determine if it is safe to continue. This
    evaluation may return true, although the tasklet has not finished
    processing of the cqr and the callback function has not been called
    yet. When the callback is finally called, the data in the cqr may
    already be invalid. The sleep_on wait condition needs a safe way to
    determine if the tasklet has finished processing. Use the
    callback_data field of the cqr to store a token, which is set by
    the callback function itself.
    Signed-off-by: Stefan Weinhuber <>
    Signed-off-by: Heiko Carstens <>
    Signed-off-by: Martin Schwidefsky <>
    Signed-off-by: Greg Kroah-Hartman <>
  26. @gregkh

    ptrace: fix return value of do_syscall_trace_enter()

    Gerald Schaefer authored gregkh committed
    commit 545c174 upstream.
    strace may change the system call number, so regs->gprs[2] must not
    be read before tracehook_report_syscall_entry(). This fixes a bug
    where "strace -f" will hang after a vfork().
    Signed-off-by: Gerald Schaefer <>
    Signed-off-by: Martin Schwidefsky <>
    Signed-off-by: Greg Kroah-Hartman <>
  27. @gregkh

    drm/i915: fix non-Ironlake 965 class crashes

    Jesse Barnes authored gregkh committed
    commit 1918ad7 upstream.
    My PIPE_CONTROL fix (just sent via Eric's tree) was buggy; I was
    testing a whole set of patches together and missed a conversion to the
    new HAS_PIPE_CONTROL macro, which will cause breakage on non-Ironlake
    965 class chips.  Fortunately, the fix is trivial and has been tested.
    Be sure to use the HAS_PIPE_CONTROL macro in i915_get_gem_seqno, or
    we'll end up reading the wrong graphics memory, likely causing hangs,
    crashes, or worse.
    Reported-by: Zdenek Kabelac <>
    Reported-by: Toralf Förster <>
    Tested-by: Toralf Förster <>
    Signed-off-by: Jesse Barnes <>
    Signed-off-by: Linus Torvalds <>
    Signed-off-by: Greg Kroah-Hartman <>
  28. @gregkh

    drm/i915: use PIPE_CONTROL instruction on Ironlake and Sandy Bridge

    Jesse Barnes authored gregkh committed
    commit e552eb7 upstream.
    Since 965, the hardware has supported the PIPE_CONTROL command, which
    provides fine grained GPU cache flushing control.  On recent chipsets,
    this instruction is required for reliable interrupt and sequence number
    reporting in the driver.
    So add support for this instruction, including workarounds, on Ironlake
    and Sandy Bridge hardware.
    Signed-off-by: Jesse Barnes <>
    Tested-by: Chris Wilson <>
    Signed-off-by: Eric Anholt <>
    Signed-off-by: Greg Kroah-Hartman <>
  29. @noglitch @gregkh

    mmc: atmel-mci: remove data error interrupt after xfer

    noglitch authored gregkh committed
    commit abc2c9f upstream.
    Disable data error interrupts while we are actually recording that there
    is not such errors.  This will prevent, in some cases, the warning message
    printed at new request queuing (in atmci_start_request()).
    Signed-off-by: Nicolas Ferre <>
    Cc: Haavard Skinnemoen <>
    Cc: <>
    Signed-off-by: Andrew Morton <>
    Signed-off-by: Linus Torvalds <>
    Signed-off-by: Greg Kroah-Hartman <>
  30. @noglitch @gregkh

    mmc: atmel-mci: prevent kernel oops while removing card

    noglitch authored gregkh committed
    commit 009a891 upstream.
    The removing of an SD card in certain circumstances can lead to a kernel
    oops if we do not make sure that the "data" field of the host structure is
    valid.  This patch adds a test in atmci_dma_cleanup() function and also
    calls atmci_stop_dma() before throwing away the reference to data.
    Signed-off-by: Nicolas Ferre <>
    Cc: Haavard Skinnemoen <>
    Cc: <>
    Signed-off-by: Andrew Morton <>
    Signed-off-by: Linus Torvalds <>
    Signed-off-by: Greg Kroah-Hartman <>
  31. @noglitch @gregkh

    mmc: atmel-mci: fix two parameters swapped

    noglitch authored gregkh committed
    commit ebb1fea upstream.
    Two parameters were swapped in the calls to atmci_init_slot().
    Signed-off-by: Nicolas Ferre <>
    Reported-by: Anders Grahn <>
    Cc: Haavard Skinnemoen <>
    Cc: <>
    Signed-off-by: Andrew Morton <>
    Signed-off-by: Linus Torvalds <>
    Signed-off-by: Greg Kroah-Hartman <>
  32. @gregkh

    ACPI: sleep: eliminate duplicate entries in acpisleep_dmi_table[]

    Alex Chiang authored gregkh committed
    commit 7d6fb7b upstream.
    Duplicate entries ended up acpisleep_dmi_table[] by accident.
    They don't hurt functionality, but they are ugly, so let's get
    rid of them.
    Signed-off-by: Alex Chiang <>
    Signed-off-by: Linus Torvalds <>
    Signed-off-by: Greg Kroah-Hartman <>
  33. @fengguang @gregkh

    ALSA: hda - fix DG45ID SPDIF output

    fengguang authored gregkh committed
    commit 4d26f44 upstream.
    This reverts part of commit 52dc438, in order to fix a regression:
    broken SPDIF output on Intel DG45FC motherboard (IDT 92HD73E1X5 codec).
    	--- DG45FC-IDT-codec-2.6.32  (SPDIF OK)
    	+++ DG45FC-IDT-codec-2.6.33  (SPDIF broken)
    	 Node 0x22 [Pin Complex] wcaps 0x400301: Stereo Digital
    	   Pincap 0x00000010: OUT
    	-  Pin Default 0x40f000f0: [N/A] Other at Ext N/A
    	-    Conn = Unknown, Color = Unknown
    	-    DefAssociation = 0xf, Sequence = 0x0
    	-  Pin-ctls: 0x00:
    	+  Pin Default 0x014510a0: [Jack] SPDIF Out at Ext Rear
    	+    Conn = Optical, Color = Black
    	+    DefAssociation = 0xa, Sequence = 0x0
    	+  Pin-ctls: 0x40: OUT
    	   Connection: 3
    	      0x25* 0x20 0x21
    	 Node 0x23 [Pin Complex] wcaps 0x400301: Stereo Digital
    	   Pincap 0x00000010: OUT
    	-  Pin Default 0x01451140: [Jack] SPDIF Out at Ext Rear
    	+  Pin Default 0x074510b0: [Jack] SPDIF Out at Ext Rear Panel
    	     Conn = Optical, Color = Black
    	-    DefAssociation = 0x4, Sequence = 0x0
    	-    Misc = NO_PRESENCE
    	-  Pin-ctls: 0x40: OUT
    	+    DefAssociation = 0xb, Sequence = 0x0
    	+  Pin-ctls: 0x00:
    	   Connection: 3
    	      0x26* 0x20 0x21
    Cc: Alexey Fisher <>
    Tested-by: David Härdeman <>
    Signed-off-by: Wu Fengguang <>
    Signed-off-by: Takashi Iwai <>
    Signed-off-by: Greg Kroah-Hartman <>
  34. @gregkh

    revert "procfs: provide stack information for threads" and its fixup …

    Robin Holt authored gregkh committed
    commit 3444142 upstream.
    Originally, commit d899bf7 ("procfs: provide stack information for
    threads") attempted to introduce a new feature for showing where the
    threadstack was located and how many pages are being utilized by the
    Commit c44972f ("procfs: disable per-task stack usage on NOMMU") was
    applied to fix the NO_MMU case.
    Commit 89240ba ("x86, fs: Fix x86 procfs stack information for threads on
    64-bit") was applied to fix a bug in ia32 executables being loaded.
    Commit 9ebd4eb ("procfs: fix /proc/<pid>/stat stack pointer for kernel
    threads") was applied to fix a bug which had kernel threads printing a
    userland stack address.
    Commit 1306d60 ('proc: partially revert "procfs: provide stack
    information for threads"') was then applied to revert the stack pages
    being used to solve a significant performance regression.
    This patch nearly undoes the effect of all these patches.
    The reason for reverting these is it provides an unusable value in
    field 28.  For x86_64, a fork will result in the task->stack_start
    value being updated to the current user top of stack and not the stack
    start address.  This unpredictability of the stack_start value makes
    it worthless.  That includes the intended use of showing how much stack
    space a thread has.
    Other architectures will get different values.  As an example, ia64
    gets 0.  The do_fork() and copy_process() functions appear to treat the
    stack_start and stack_size parameters as architecture specific.
    I only partially reverted c44972f ("procfs: disable per-task stack usage
    on NOMMU") .  If I had completely reverted it, I would have had to change
    mm/Makefile only build pagewalk.o when CONFIG_PROC_PAGE_MONITOR is
    configured.  Since I could not test the builds without significant effort,
    I decided to not change mm/Makefile.
    I only partially reverted 89240ba ("x86, fs: Fix x86 procfs stack
    information for threads on 64-bit") .  I left the KSTK_ESP() change in
    place as that seemed worthwhile.
    Signed-off-by: Robin Holt <>
    Cc: Stefani Seibold <>
    Cc: KOSAKI Motohiro <>
    Cc: Michal Simek <>
    Cc: Ingo Molnar <>
    Signed-off-by: Andrew Morton <>
    Signed-off-by: Linus Torvalds <>
    Signed-off-by: Greg Kroah-Hartman <>
  35. @pkgadd @gregkh

    ALSA: Revert "ALSA: hda/realtek: quirk for D945GCLF2 mainboard"

    pkgadd authored gregkh committed
    commit 482c453 upstream.
    This reverts commit 7aee674.
    As it doesn't seem to be universally valid for all mainboard revisions of
    the D945GCLF2 and breaks snd-hda-intel/ snd-hda-codec-realtek on the Intel
    Corporation "D945GCLF2" (LF94510J.86A.0229.2009.0729.0209) mainboard.
    00:1b.0 Audio device [0403]: Intel Corporation N10/ICH 7 Family High Definition Audio Controller [8086:27d8] (rev 01)
    Signed-off-by: Stefan Lippers-Hollmann <>
    Signed-off-by: Takashi Iwai <>
    Signed-off-by: Greg Kroah-Hartman <>
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