From bf510ac380c0e5aac813455fdf7364613cf75b72 Mon Sep 17 00:00:00 2001
From: Douglas Schilling Landgraf <dougsland@redhat.com>
Date: Sun, 8 Feb 2009 01:11:13 -0300
Subject: [PATCH] V4L/DVB (10521): em28xx-audio: Add lock for users
Added lock for users count
Signed-off-by: Douglas Schilling Landgraf <dougsland@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
---
drivers/media/video/em28xx/em28xx-audio.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/media/video/em28xx/em28xx-audio.c b/drivers/media/video/em28xx/em28xx-audio.c
index 8e9957dbdbec..38436af2164b 100644
--- a/drivers/media/video/em28xx/em28xx-audio.c
+++ b/drivers/media/video/em28xx/em28xx-audio.c
@@ -313,7 +313,9 @@ static int snd_em28xx_capture_open(struct snd_pcm_substream *substream)
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;
@@ -328,12 +330,12 @@ err:
static int snd_em28xx_pcm_close(struct snd_pcm_substream *substream)
{
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);
--
2.34.1