diff options
Diffstat (limited to 'linux/drivers/media/radio/radio-gemtek.c')
| -rw-r--r-- | linux/drivers/media/radio/radio-gemtek.c | 16 |
1 files changed, 14 insertions, 2 deletions
diff --git a/linux/drivers/media/radio/radio-gemtek.c b/linux/drivers/media/radio/radio-gemtek.c index bf1837ab2..a8395fb23 100644 --- a/linux/drivers/media/radio/radio-gemtek.c +++ b/linux/drivers/media/radio/radio-gemtek.c @@ -58,6 +58,7 @@ static int shutdown = 1; static int keepmuted = 1; static int initmute = 1; static int radio_nr = -1; +static unsigned long in_use; module_param(io, int, 0444); MODULE_PARM_DESC(io, "Force I/O port for the GemTek Radio card if automatic " @@ -394,10 +395,21 @@ static struct v4l2_queryctrl radio_qctrl[] = { } }; +static int gemtek_exclusive_open(struct inode *inode, struct file *file) +{ + return test_and_set_bit(0, &in_use) ? -EBUSY : 0; +} + +static int gemtek_exclusive_release(struct inode *inode, struct file *file) +{ + clear_bit(0, &in_use); + return 0; +} + static const struct file_operations gemtek_fops = { .owner = THIS_MODULE, - .open = video_exclusive_open, - .release = video_exclusive_release, + .open = gemtek_exclusive_open, + .release = gemtek_exclusive_release, .ioctl = video_ioctl2, #ifdef CONFIG_COMPAT .compat_ioctl = v4l_compat_ioctl32, |