xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

ALSA: hda - Protect user-defined arrays via mutex

Browse Source 
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
Download Patch File Download Diff File Expand all files Collapse all files

13
sound/pci/hda/hda_codec.c
View File

@@ -1086,9 +1086,16 @@ unsigned int snd_hda_codec_get_pincfg(struct hda_codec *codec, hda_nid_t nid)
struct hda_pincfg *pin;
#ifdef CONFIG_SND_HDA_HWDEP
pin = look_up_pincfg(codec, &codec->user_pins, nid);
if (pin)
return pin->cfg;
{
unsigned int cfg = 0;
mutex_lock(&codec->user_mutex);
pin = look_up_pincfg(codec, &codec->user_pins, nid);
if (pin)
cfg = pin->cfg;
mutex_unlock(&codec->user_mutex);
if (cfg)
return cfg;
}
#endif
pin = look_up_pincfg(codec, &codec->driver_pins, nid);
if (pin)