diff options
Diffstat (limited to 'drivers/media/radio/radio-sf16fmi.c')
| -rw-r--r-- | drivers/media/radio/radio-sf16fmi.c | 16 |
1 files changed, 14 insertions, 2 deletions
diff --git a/drivers/media/radio/radio-sf16fmi.c b/drivers/media/radio/radio-sf16fmi.c index 0d478f54a907..55f8334513f3 100644 --- a/drivers/media/radio/radio-sf16fmi.c +++ b/drivers/media/radio/radio-sf16fmi.c @@ -45,6 +45,7 @@ static struct v4l2_queryctrl radio_qctrl[] = { struct fmi_device { + unsigned long in_use; int port; int curvol; /* 1 or 0 */ unsigned long curfreq; /* freq in kHz */ @@ -284,10 +285,21 @@ static int vidioc_s_audio(struct file *file, void *priv, static struct fmi_device fmi_unit; +static int fmi_exclusive_open(struct inode *inode, struct file *file) +{ + return test_and_set_bit(0, &fmi_unit.in_use) ? -EBUSY : 0; +} + +static int fmi_exclusive_release(struct inode *inode, struct file *file) +{ + clear_bit(0, &fmi_unit.in_use); + return 0; +} + static const struct file_operations fmi_fops = { .owner = THIS_MODULE, - .open = video_exclusive_open, - .release = video_exclusive_release, + .open = fmi_exclusive_open, + .release = fmi_exclusive_release, .ioctl = video_ioctl2, #ifdef CONFIG_COMPAT .compat_ioctl = v4l_compat_ioctl32, |