• Takashi Iwai's avatar
    ALSA: ctxfi - Fix Oops at mmapping · 8a4259bf
    Takashi Iwai authored
    Replace a spinlock with a mutex protecting the vm block list at
    mmap / munmap calls, which caused Oops like below:
    
    BUG: sleeping function called from invalid context at mm/slub.c:1599
    in_atomic(): 0, irqs_disabled(): 1, pid: 32065, name: xine
    Pid: 32065, comm: xine Tainted: P           2.6.29.4-75.fc10.x86_64 #1
    Call Trace:
      [<ffffffff81040685>] __might_sleep+0x105/0x10a
      [<ffffffff810c9fae>] kmem_cache_alloc+0x32/0xe2
      [<ffffffffa08e3110>] ct_vm_map+0xfa/0x19e [snd_ctxfi]
      [<ffffffffa08e1a07>] ct_map_audio_buffer+0x4c/0x76 [snd_ctxfi]
      [<ffffffffa08e2aa5>] atc_pcm_playback_prepare+0x1d7/0x2a8 [snd_ctxfi]
      [<ffffffff8105ef3f>] ? up_read+0x9/0xb
      [<ffffffff81186b61>] ? __up_read+0x7c/0x87
      [<ffffffffa08e36a6>] ct_pcm_playback_prepare+0x39/0x60 [snd_ctxfi]
      [<ffffffffa0886bcb>] snd_pcm_do_prepare+0x16/0x28 [snd_pcm]
      [<ffffffffa08867c7>] snd_pcm_action_single+0x2d/0x5b [snd_pcm]
      [<ffffffffa08881f3>] snd_pcm_action_nonatomic+0x52/0x6a [snd_pcm]
      [<ffffffffa088a723>] snd_pcm_common_ioctl1+0x404/0xc79 [snd_pcm]
      [<ffffffff810c52c8>] ? alloc_pages_current+0xb9/0xc2
      [<ffffffff810c9402>] ? new_slab+0x1a5/0x1cb
      [<ffffffff810ab9ea>] ? vma_prio_tree_insert+0x23/0xc1
      [<ffffffffa088b411>] snd_pcm_playback_ioctl1+0x213/0x230 [snd_pcm]
      [<ffffffff810b6c20>] ? mmap_region+0x397/0x4c9
      [<ffffffffa088bd9b>] snd_pcm_playback_ioctl+0x2e/0x36 [snd_pcm]
      [<ffffffff810ddc64>] vfs_ioctl+0x2a/0x78
      [<ffffffff810de130>] do_vfs_ioctl+0x462/0x4a2
      [<ffffffff81029cef>] ? default_spin_lock_flags+0x9/0xe
      [<ffffffff81374647>] ? trace_hardirqs_off_thunk+0x3a/0x6c
      [<ffffffff810de1c5>] sys_ioctl+0x55/0x77
      [<ffffffff8101133a>] system_call_fastpath+0x16/0x1b
    Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
    8a4259bf
ctatc.h 4.88 KB