1 files changed, 21 insertions, 8 deletions

diff --git a/drivers/media/video/arv.c b/drivers/media/video/arv.c
index 9e436ad..218754b 100644
--- a/drivers/media/video/arv.c
+++ b/drivers/media/video/arv.c
@@ -116,6 +116,7 @@ struct ar_device {
 	int width, height;
 	int frame_bytes, line_bytes;
 	wait_queue_head_t wait;
+	unsigned long in_use;
 	struct mutex lock;
 };
 
@@ -269,7 +270,7 @@ static inline void wait_for_vertical_sync(int exp_line)
 static ssize_t ar_read(struct file *file, char *buf, size_t count, loff_t *ppos)
 {
 	struct video_device *v = video_devdata(file);
-	struct ar_device *ar = v->priv;
+	struct ar_device *ar = video_get_drvdata(v);
 	long ret = ar->frame_bytes;		/* return read bytes */
 	unsigned long arvcr1 = 0;
 	unsigned long flags;
@@ -399,7 +400,7 @@ static int ar_do_ioctl(struct inode *inode, struct file *file,
 		       unsigned int cmd, void *arg)
 {
 	struct video_device *dev = video_devdata(file);
-	struct ar_device *ar = dev->priv;
+	struct ar_device *ar = video_get_drvdata(dev);
 
 	DEBUG(1, "ar_ioctl()\n");
 	switch(cmd) {
@@ -625,7 +626,7 @@ static void ar_interrupt(int irq, void *dev)
  */
 static int ar_initialize(struct video_device *dev)
 {
-	struct ar_device *ar = dev->priv;
+	struct ar_device *ar = video_get_drvdata(dev);
 	unsigned long cr = 0;
 	int i,found=0;
 
@@ -732,7 +733,7 @@ static int ar_initialize(struct video_device *dev)
 
 void ar_release(struct video_device *vfd)
 {
-	struct ar_device *ar = vfd->priv;
+	struct ar_device *ar = video_get_drvdata(vfd);
 	mutex_lock(&ar->lock);
 	video_device_release(vfd);
 }
@@ -742,10 +743,23 @@ void ar_release(struct video_device *vfd)
  * Video4Linux Module functions
  *
  ****************************************************************************/
+static struct ar_device ardev;
+
+static int ar_exclusive_open(struct inode *inode, struct file *file)
+{
+	return test_and_set_bit(0, &ardev.in_use) ? -EBUSY : 0;
+}
+
+static int ar_exclusive_release(struct inode *inode, struct file *file)
+{
+	clear_bit(0, &ardev.in_use);
+	return 0;
+}
+
 static const struct file_operations ar_fops = {
 	.owner		= THIS_MODULE,
-	.open		= video_exclusive_open,
-	.release	= video_exclusive_release,
+	.open		= ar_exclusive_open,
+	.release	= ar_exclusive_release,
 	.read		= ar_read,
 	.ioctl		= ar_ioctl,
 #ifdef CONFIG_COMPAT
@@ -762,7 +776,6 @@ static struct video_device ar_template = {
 };
 
 #define ALIGN4(x)	((((int)(x)) & 0x3) == 0)
-static struct ar_device ardev;
 
 static int __init ar_init(void)
 {
@@ -802,7 +815,7 @@ static int __init ar_init(void)
 		return -ENOMEM;
 	}
 	memcpy(ar->vdev, &ar_template, sizeof(ar_template));
-	ar->vdev->priv = ar;
+	video_set_drvdata(ar->vdev, ar);
 
 	if (vga) {
 		ar->width 	= AR_WIDTH_VGA;