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path: root/drivers/media/radio/radio-trust.c
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Diffstat (limited to 'drivers/media/radio/radio-trust.c')
-rw-r--r--drivers/media/radio/radio-trust.c17
1 files changed, 15 insertions, 2 deletions
diff --git a/drivers/media/radio/radio-trust.c b/drivers/media/radio/radio-trust.c
index 193161956253..e7b111fcd105 100644
--- a/drivers/media/radio/radio-trust.c
+++ b/drivers/media/radio/radio-trust.c
@@ -78,6 +78,7 @@ static __u16 curtreble;
static unsigned long curfreq;
static int curstereo;
static int curmute;
+static unsigned long in_use;
/* i2c addresses */
#define TDA7318_ADDR 0x88
@@ -336,10 +337,21 @@ static int vidioc_s_audio(struct file *file, void *priv,
return 0;
}
+static int trust_exclusive_open(struct inode *inode, struct file *file)
+{
+ return test_and_set_bit(0, &in_use) ? -EBUSY : 0;
+}
+
+static int trust_exclusive_release(struct inode *inode, struct file *file)
+{
+ clear_bit(0, &in_use);
+ return 0;
+}
+
static const struct file_operations trust_fops = {
.owner = THIS_MODULE,
- .open = video_exclusive_open,
- .release = video_exclusive_release,
+ .open = trust_exclusive_open,
+ .release = trust_exclusive_release,
.ioctl = video_ioctl2,
#ifdef CONFIG_COMPAT
.compat_ioctl = v4l_compat_ioctl32,
@@ -366,6 +378,7 @@ static struct video_device trust_radio = {
.name = "Trust FM Radio",
.fops = &trust_fops,
.ioctl_ops = &trust_ioctl_ops,
+ .release = video_device_release_empty,
};
static int __init trust_init(void)