V4L/DVB (7164): em28xx-alsa: Add a missing mutex
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
diff --git a/drivers/media/video/em28xx/em28xx-audio.c b/drivers/media/video/em28xx/em28xx-audio.c
index 2c7343d..8c67f67 100644
--- a/drivers/media/video/em28xx/em28xx-audio.c
+++ b/drivers/media/video/em28xx/em28xx-audio.c
@@ -269,8 +269,11 @@
dprintk("opening device and trying to acquire exclusive lock\n");
/* Sets volume, mute, etc */
+
dev->mute = 0;
+ mutex_lock(&dev->lock);
ret = em28xx_audio_analog_set(dev);
+ mutex_unlock(&dev->lock);
if (ret < 0)
goto err;
@@ -302,7 +305,9 @@
dprintk("closing device\n");
dev->mute = 1;
+ mutex_lock(&dev->lock);
em28xx_audio_analog_set(dev);
+ mutex_unlock(&dev->lock);
if (dev->adev->users == 0 && dev->adev->shutdown == 1) {
dprintk("audio users: %d\n", dev->adev->users);
diff --git a/drivers/media/video/em28xx/em28xx.h b/drivers/media/video/em28xx/em28xx.h
index 9759a73..813c0af 100644
--- a/drivers/media/video/em28xx/em28xx.h
+++ b/drivers/media/video/em28xx/em28xx.h
@@ -345,7 +345,6 @@
int em28xx_write_regs_req(struct em28xx *dev, u8 req, u16 reg, char *buf,
int len);
int em28xx_write_regs(struct em28xx *dev, u16 reg, char *buf, int len);
-int em28xx_set_audio_source(struct em28xx *dev);
int em28xx_audio_analog_set(struct em28xx *dev);
int em28xx_colorlevels_set_default(struct em28xx *dev);
