1 files changed, 14 insertions, 2 deletions

diff --git a/drivers/media/radio/radio-aztech.c b/drivers/media/radio/radio-aztech.c
index 628c689e3ffe..ae18a7cf0d59 100644
--- a/drivers/media/radio/radio-aztech.c
+++ b/drivers/media/radio/radio-aztech.c
@@ -70,6 +70,7 @@ static struct mutex lock;
 
 struct az_device
 {
+        unsigned long in_use;
         int curvol;
         unsigned long curfreq;
         int stereo;
@@ -342,10 +343,21 @@ static int vidioc_s_ctrl (struct file *file, void *priv,
 
 static struct az_device aztech_unit;
 
+static int aztech_exclusive_open(struct inode *inode, struct file *file)
+{
+        return test_and_set_bit(0, &aztech_unit.in_use) ? -EBUSY : 0;
+}
+
+static int aztech_exclusive_release(struct inode *inode, struct file *file)
+{
+        clear_bit(0, &aztech_unit.in_use);
+        return 0;
+}
+
 static const struct file_operations aztech_fops = {
         .owner          = THIS_MODULE,
-        .open           = video_exclusive_open,
-        .release        = video_exclusive_release,
+        .open           = aztech_exclusive_open,
+        .release        = aztech_exclusive_release,
         .ioctl          = video_ioctl2,
 #ifdef CONFIG_COMPAT
         .compat_ioctl   = v4l_compat_ioctl32,