diff options
Diffstat (limited to 'drivers/media/radio/radio-aimslab.c')
| -rw-r--r-- | drivers/media/radio/radio-aimslab.c | 16 |
1 files changed, 14 insertions, 2 deletions
diff --git a/drivers/media/radio/radio-aimslab.c b/drivers/media/radio/radio-aimslab.c index 1f064f4b32d..b657c7bb47c 100644 --- a/drivers/media/radio/radio-aimslab.c +++ b/drivers/media/radio/radio-aimslab.c @@ -51,6 +51,7 @@ static struct mutex lock; struct rt_device { + unsigned long in_use; int port; int curvol; unsigned long curfreq; @@ -378,10 +379,21 @@ static int vidioc_s_audio(struct file *file, void *priv, static struct rt_device rtrack_unit; +static int rtrack_exclusive_open(struct inode *inode, struct file *file) +{ + return test_and_set_bit(0, &rtrack_unit.in_use) ? -EBUSY : 0; +} + +static int rtrack_exclusive_release(struct inode *inode, struct file *file) +{ + clear_bit(0, &rtrack_unit.in_use); + return 0; +} + static const struct file_operations rtrack_fops = { .owner = THIS_MODULE, - .open = video_exclusive_open, - .release = video_exclusive_release, + .open = rtrack_exclusive_open, + .release = rtrack_exclusive_release, .ioctl = video_ioctl2, #ifdef CONFIG_COMPAT .compat_ioctl = v4l_compat_ioctl32, |