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path: root/drivers/media/radio/radio-aimslab.c
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Diffstat (limited to 'drivers/media/radio/radio-aimslab.c')
-rw-r--r--drivers/media/radio/radio-aimslab.c16
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,