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path: root/drivers/media/radio/radio-sf16fmr2.c
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Diffstat (limited to 'drivers/media/radio/radio-sf16fmr2.c')
-rw-r--r--drivers/media/radio/radio-sf16fmr2.c16
1 files changed, 14 insertions, 2 deletions
diff --git a/drivers/media/radio/radio-sf16fmr2.c b/drivers/media/radio/radio-sf16fmr2.c
index 6290553d24b..14153ed939d 100644
--- a/drivers/media/radio/radio-sf16fmr2.c
+++ b/drivers/media/radio/radio-sf16fmr2.c
@@ -64,6 +64,7 @@ static struct v4l2_queryctrl radio_qctrl[] = {
/* this should be static vars for module size */
struct fmr2_device
{
+ unsigned long in_use;
int port;
int curvol; /* 0-15 */
int mute;
@@ -400,10 +401,21 @@ static int vidioc_s_audio(struct file *file, void *priv,
static struct fmr2_device fmr2_unit;
+static int fmr2_exclusive_open(struct inode *inode, struct file *file)
+{
+ return test_and_set_bit(0, &fmr2_unit.in_use) ? -EBUSY : 0;
+}
+
+static int fmr2_exclusive_release(struct inode *inode, struct file *file)
+{
+ clear_bit(0, &fmr2_unit.in_use);
+ return 0;
+}
+
static const struct file_operations fmr2_fops = {
.owner = THIS_MODULE,
- .open = video_exclusive_open,
- .release = video_exclusive_release,
+ .open = fmr2_exclusive_open,
+ .release = fmr2_exclusive_release,
.ioctl = video_ioctl2,
#ifdef CONFIG_COMPAT
.compat_ioctl = v4l_compat_ioctl32,