Change locking to allow tea575x-radio device to be opened multiple times.
Signed-off-by: Ondrej Zary <linux@xxxxxxxxxxxxxxxxxxxx>
--- linux-2.6.39-rc2-/include/sound/tea575x-tuner.h 2011-06-11 15:21:50.000000000 +0200
+++ linux-2.6.39-rc2/include/sound/tea575x-tuner.h 2011-06-11 14:50:55.000000000 +0200
@@ -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];
--- linux-2.6.39-rc2-/sound/i2c/other/tea575x-tuner.c 2011-06-11 15:21:50.000000000 +0200
+++ linux-2.6.39-rc2/sound/i2c/other/tea575x-tuner.c 2011-06-11 14:57:28.000000000 +0200
@@ -282,26 +282,9 @@ static int vidioc_s_input(struct file *f
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
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;
--
Ondrej Zary
--
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