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authorTakashi Iwai <tiwai@suse.de>2012-10-15 12:16:02 +0200
committerTakashi Iwai <tiwai@suse.de>2012-10-30 11:07:00 +0100
commit34f3c89fda4fba9fe689db22253ca8db2f5e6386 (patch)
tree213e1b6e6ceaee42dc4f9ec74307794dc7a83b20 /sound/usb/usbaudio.h
parent978520b75f0a1ce82b17e1e8186417250de6d545 (diff)
downloadlinux-34f3c89fda4fba9fe689db22253ca8db2f5e6386.tar.bz2
ALSA: usb-audio: Use rwsem for disconnect protection
Replace mutex with rwsem for codec->shutdown protection so that concurrent accesses are allowed. Also add the protection to snd_usb_autosuspend() and snd_usb_autoresume(), too. Reported-by: Matthieu CASTET <matthieu.castet@parrot.com> Cc: <stable@vger.kernel.org> Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/usb/usbaudio.h')
-rw-r--r--sound/usb/usbaudio.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/sound/usb/usbaudio.h b/sound/usb/usbaudio.h
index b8233ebe250f..ef42797f56fb 100644
--- a/sound/usb/usbaudio.h
+++ b/sound/usb/usbaudio.h
@@ -37,7 +37,7 @@ struct snd_usb_audio {
struct usb_interface *pm_intf;
u32 usb_id;
struct mutex mutex;
- struct mutex shutdown_mutex;
+ struct rw_semaphore shutdown_rwsem;
unsigned int shutdown:1;
unsigned int probing:1;
unsigned int autosuspended:1;