diff options
Diffstat (limited to 'drivers/media/radio/radio-zoltrix.c')
| -rw-r--r-- | drivers/media/radio/radio-zoltrix.c | 16 |
1 files changed, 14 insertions, 2 deletions
diff --git a/drivers/media/radio/radio-zoltrix.c b/drivers/media/radio/radio-zoltrix.c index 51d57ed3b3e1..4d76e710194b 100644 --- a/drivers/media/radio/radio-zoltrix.c +++ b/drivers/media/radio/radio-zoltrix.c @@ -69,6 +69,7 @@ static int io = CONFIG_RADIO_ZOLTRIX_PORT; static int radio_nr = -1; struct zol_device { + unsigned long in_use; int port; int curvol; unsigned long curfreq; @@ -396,11 +397,22 @@ static int vidioc_s_audio(struct file *file, void *priv, static struct zol_device zoltrix_unit; +static int zoltrix_exclusive_open(struct inode *inode, struct file *file) +{ + return test_and_set_bit(0, &zoltrix_unit.in_use) ? -EBUSY : 0; +} + +static int zoltrix_exclusive_release(struct inode *inode, struct file *file) +{ + clear_bit(0, &zoltrix_unit.in_use); + return 0; +} + static const struct file_operations zoltrix_fops = { .owner = THIS_MODULE, - .open = video_exclusive_open, - .release = video_exclusive_release, + .open = zoltrix_exclusive_open, + .release = zoltrix_exclusive_release, .ioctl = video_ioctl2, #ifdef CONFIG_COMPAT .compat_ioctl = v4l_compat_ioctl32, |