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authorOndrej Zary <linux@rainbow-software.org>2011-06-11 17:28:59 +0400
committerMauro Carvalho Chehab <mchehab@redhat.com>2011-07-28 00:53:07 +0400
commit6a529c1a4a87e0f5d143ad3bc0d37179332f210e (patch)
tree50b293832428289f8d8bcea7effabaee3be0b6d6
parent9cd49719fda38613e9d7c712b11a54ea4ea005dc (diff)
downloadlinux-6a529c1a4a87e0f5d143ad3bc0d37179332f210e.tar.xz
[media] tea575x: allow multiple opens
Change locking to allow tea575x-radio device to be opened multiple times. Signed-off-by: Ondrej Zary <linux@rainbow-software.org> Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
-rw-r--r--include/sound/tea575x-tuner.h2
-rw-r--r--sound/i2c/other/tea575x-tuner.c22
2 files changed, 4 insertions, 20 deletions
diff --git a/include/sound/tea575x-tuner.h b/include/sound/tea575x-tuner.h
index 5aa8186e7820..726e94742a5c 100644
--- a/include/sound/tea575x-tuner.h
+++ b/include/sound/tea575x-tuner.h
@@ -49,7 +49,7 @@ struct snd_tea575x {
bool tuned; /* tuned to a station */
unsigned int val; /* hw value */
unsigned long freq; /* frequency */
- unsigned long in_use; /* set if the device is in use */
+ struct mutex mutex;
struct snd_tea575x_ops *ops;
void *private_data;
u8 card[32];
diff --git a/sound/i2c/other/tea575x-tuner.c b/sound/i2c/other/tea575x-tuner.c
index 0d7a659c494c..beb0e86537cd 100644
--- a/sound/i2c/other/tea575x-tuner.c
+++ b/sound/i2c/other/tea575x-tuner.c
@@ -282,26 +282,9 @@ static int vidioc_s_input(struct file *filp, void *priv, unsigned int i)
return 0;
}
-static int snd_tea575x_exclusive_open(struct file *file)
-{
- struct snd_tea575x *tea = video_drvdata(file);
-
- return test_and_set_bit(0, &tea->in_use) ? -EBUSY : 0;
-}
-
-static int snd_tea575x_exclusive_release(struct file *file)
-{
- struct snd_tea575x *tea = video_drvdata(file);
-
- clear_bit(0, &tea->in_use);
- return 0;
-}
-
static const struct v4l2_file_operations tea575x_fops = {
.owner = THIS_MODULE,
- .open = snd_tea575x_exclusive_open,
- .release = snd_tea575x_exclusive_release,
- .ioctl = video_ioctl2,
+ .unlocked_ioctl = video_ioctl2,
};
static const struct v4l2_ioctl_ops tea575x_ioctl_ops = {
@@ -340,13 +323,14 @@ int snd_tea575x_init(struct snd_tea575x *tea)
if (snd_tea575x_read(tea) != 0x55AA)
return -ENODEV;
- tea->in_use = 0;
tea->val = TEA575X_BIT_BAND_FM | TEA575X_BIT_SEARCH_10_40;
tea->freq = 90500 * 16; /* 90.5Mhz default */
snd_tea575x_set_freq(tea);
tea->vd = tea575x_radio;
video_set_drvdata(&tea->vd, tea);
+ mutex_init(&tea->mutex);
+ tea->vd.lock = &tea->mutex;
v4l2_ctrl_handler_init(&tea->ctrl_handler, 1);
tea->vd.ctrl_handler = &tea->ctrl_handler;