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| author | Frederik Deweerdt <deweerdt@free.fr> | 2008-04-14 13:11:44 +0200 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2008-04-24 12:00:33 +0200 |
| commit | eaa9985b4edb5f8008998abdda8b85ddeba05f1f (patch) | |
| tree | bceda3f2b49f9d17d5bf954045412af6940d9281 /sound | |
| parent | 66c9aa6043798197e1760eaf4c5f510d6c69b95a (diff) | |
| download | linux-eaa9985b4edb5f8008998abdda8b85ddeba05f1f.tar.bz2 | |
[ALSA] hda-codec - Fix unbalanced mutex
On Wed, Apr 02, 2008 at 08:19:29AM -0400, Miles Lane wrote:
> [ 48.765906] [ BUG: bad unlock balance detected! ]
> [ 48.765912] -------------------------------------
> [ 48.765918] pulseaudio/4277 is trying to release lock
> (&codec->spdif_mutex) at:
> [ 48.765930] [<c03031b7>] mutex_unlock+0x8/0xa
> [ 48.765945] but there are no more locks to release!
> [ 48.765950]
> [ 48.765952] other info that might help us debug this:
> [ 48.765959] 2 locks held by pulseaudio/4277:
> [ 48.765965] #0: (&pcm->open_mutex){--..}, at: [<f89f134b>]
> snd_pcm_open+0xc1/0x1ba [snd_pcm]
> [ 48.766003] #1: (&chip->open_mutex){--..}, at: [<f8b4f13d>]
> azx_pcm_open+0x36/0x184 [snd_hda_intel]
> [ 48.766057]
> [ 48.766059] stack backtrace:
> [ 48.766066] Pid: 4277, comm: pulseaudio Not tainted 2.6.25-rc8-mm1 #12
> [ 48.766086] [<c013afc6>] print_unlock_inbalance_bug+0xce/0xd8
> [ 48.766107] [<c0109e1c>] ? save_stack_trace+0x1d/0x3b
> [ 48.766130] [<c012f54e>] ? __kernel_text_address+0x1b/0x27
> [ 48.766146] [<c0104533>] ? dump_trace+0xcd/0xd9
> [ 48.766160] [<c0109d9e>] ? save_stack_address+0x0/0x2c
> [ 48.766176] [<c013b80a>] ? find_usage_backwards+0xa4/0xc3
> [ 48.766193] [<c013cfb5>] lock_release_non_nested+0x84/0x120
> [ 48.766209] [<c03031b7>] ? mutex_unlock+0x8/0xa
> [ 48.766222] [<c013d1bb>] lock_release+0x16a/0x199
> [ 48.766238] [<c0303137>] __mutex_unlock_slowpath+0xa9/0x121
> [ 48.766252] [<c03031b7>] mutex_unlock+0x8/0xa
> [ 48.766263] [<f8b4ffd8>] snd_hda_multi_out_analog_open+0xd3/0xef
> [snd_hda_intel]
The following patch should fix it.
Cc: "Miles Lane" <miles.lane@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound')
| -rw-r--r-- | sound/pci/hda/hda_codec.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/sound/pci/hda/hda_codec.c b/sound/pci/hda/hda_codec.c index 689d177c17bd..a6be6e3e8716 100644 --- a/sound/pci/hda/hda_codec.c +++ b/sound/pci/hda/hda_codec.c @@ -2665,8 +2665,8 @@ int snd_hda_multi_out_analog_open(struct hda_codec *codec, if (mout->spdif_maxbps < hinfo->maxbps) hinfo->maxbps = mout->spdif_maxbps; } + mutex_unlock(&codec->spdif_mutex); } - mutex_unlock(&codec->spdif_mutex); return snd_pcm_hw_constraint_step(substream->runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS, 2); } |