diff options
| author | Takashi Iwai <tiwai@suse.de> | 2013-01-10 18:21:56 +0100 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2013-01-12 08:44:45 +0100 |
| commit | 09b70e8509862debff5a033052f8adbd7402fa4e (patch) | |
| tree | 6e67702a50a9433b198cf2d7358be3dca39fe740 /sound/pci/hda/patch_sigmatel.c | |
| parent | 08fb0d0ee1b9c7aef79f54a9ae24470621eb6447 (diff) | |
ALSA: hda - Protect user-defined arrays via mutex
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>
Diffstat (limited to 'sound/pci/hda/patch_sigmatel.c')
| -rw-r--r-- | sound/pci/hda/patch_sigmatel.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/sound/pci/hda/patch_sigmatel.c b/sound/pci/hda/patch_sigmatel.c index a86547ca17c8..d3a81f10fe5c 100644 --- a/sound/pci/hda/patch_sigmatel.c +++ b/sound/pci/hda/patch_sigmatel.c @@ -4298,15 +4298,20 @@ static void stac_toggle_power_map(struct hda_codec *codec, hda_nid_t nid, static inline int get_int_hint(struct hda_codec *codec, const char *key, int *valp) { +#ifdef CONFIG_SND_HDA_RECONFIG const char *p; + mutex_lock(&codec->user_mutex); p = snd_hda_get_hint(codec, key); if (p) { unsigned long val; if (!strict_strtoul(p, 0, &val)) { *valp = val; + mutex_unlock(&codec->user_mutex); return 1; } } + mutex_unlock(&codec->user_mutex); +#endif return 0; } |