The patch number 10521 was added via Douglas Schilling Landgraf
<dougsl...@redhat.com>
to http://linuxtv.org/hg/v4l-dvb master development tree.
Kernel patches in this development tree may be modified to be backward
compatible with older kernels. Compatibility modifications will be
removed before inclusion into the mainstream Kernel
If anyone has any objections, please let us know by sending a message to:
Linux Media Mailing List <linux-me...@vger.kernel.org>
------
From: Douglas Schilling Landgraf <dougsl...@redhat.com>
em28xx-audio: Add lock for users
Added lock for users count
Priority: high
Signed-off-by: Douglas Schilling Landgraf <dougsl...@redhat.com>
---
linux/drivers/media/video/em28xx/em28xx-audio.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff -r 3d6a5f68cefe -r cb89d94e541b
linux/drivers/media/video/em28xx/em28xx-audio.c
--- a/linux/drivers/media/video/em28xx/em28xx-audio.c Sun Feb 08 15:17:15
2009 -0200
+++ b/linux/drivers/media/video/em28xx/em28xx-audio.c Sun Feb 08 02:11:13
2009 -0200
@@ -356,7 +356,9 @@ static int snd_em28xx_capture_open(struc
dprintk("changing alternate number to 7\n");
}
+ mutex_lock(&dev->lock);
dev->adev.users++;
+ mutex_unlock(&dev->lock);
snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS);
dev->adev.capture_pcm_substream = substream;
@@ -375,12 +377,12 @@ static int snd_em28xx_pcm_close(struct s
#endif
{
struct em28xx *dev = snd_pcm_substream_chip(substream);
- dev->adev.users--;
dprintk("closing device\n");
dev->mute = 1;
mutex_lock(&dev->lock);
+ dev->adev.users--;
em28xx_audio_analog_set(dev);
mutex_unlock(&dev->lock);
---
Patch is available at:
http://linuxtv.org/hg/v4l-dvb/rev/cb89d94e541b7635e9db8e3c39340e98cfbbecdd
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