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ALSA: hda - Protect user-defined arrays via mutex

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The pincfgs, init_verbs and hints set by sysfs or patch might be
changed dynamically on the fly, thus we need to protect it.
Add a simple protection via a mutex.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai
2013-01-10 18:21:56 +01:00
parent 08fb0d0ee1
commit 09b70e8509
4 changed files with 65 additions and 21 deletions
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1
sound/pci/hda/hda_codec.h
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@@ -845,6 +845,7 @@ struct hda_codec {
struct snd_array cvt_setups; /* audio convert setups */
#ifdef CONFIG_SND_HDA_HWDEP
struct mutex user_mutex;
struct snd_hwdep *hwdep; /* assigned hwdep device */
struct snd_array init_verbs; /* additional init verbs */
struct snd_array hints; /* additional hints */