From: Wu Fengguang <wfg@linux.intel.com>
Date: Fri, 9 Jan 2009 08:45:24 +0000 (+0800)
Subject: ALSA: hda - create hda_codec.control_mutex for kcontrol->private_value
X-Git-Tag: v2.6.29-rc2~112^2~1^2~2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=5a9e02e94989323c2a7102e2fc80ee9102b19fa0;p=pandora-kernel.git

ALSA: hda - create hda_codec.control_mutex for kcontrol->private_value

Fix the following lockdep warning by not reusing the hda_codec.spdif_mutex.

    ALSA sound/pci/hda/hda_codec.c:882: hda_codec_cleanup_stream: NID=0x2

    =======================================================
    [ INFO: possible circular locking dependency detected ]
    2.6.28-next-20090102 #33
    -------------------------------------------------------
    mplayer/3151 is trying to acquire lock:
     (&pcm->open_mutex){--..}, at: [<ffffffffa004ced3>] snd_pcm_release+0x43/0xd0 [snd_pcm]

    but task is already holding lock:
     (&mm->mmap_sem){----}, at: [<ffffffff810c0252>] sys_munmap+0x42/0x80

    which lock already depends on the new lock.

Signed-off-by: Wu Fengguang <fengguang.wu@intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
---

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