1 files changed, 23 insertions, 14 deletions

diff --git a/drivers/media/radio/radio-maestro.c b/drivers/media/radio/radio-maestro.c
index 0ada1c697e8..4bf4d007bcf 100644
--- a/drivers/media/radio/radio-maestro.c
+++ b/drivers/media/radio/radio-maestro.c
@@ -75,7 +75,21 @@ static struct v4l2_queryctrl radio_qctrl[] = {
 static int radio_nr = -1;
 module_param(radio_nr, int, 0);
 
+static unsigned long in_use;
+
 static int maestro_probe(struct pci_dev *pdev, const struct pci_device_id *ent);
+
+static int maestro_exclusive_open(struct inode *inode, struct file *file)
+{
+	return test_and_set_bit(0, &in_use) ? -EBUSY : 0;
+}
+
+static int maestro_exclusive_release(struct inode *inode, struct file *file)
+{
+	clear_bit(0, &in_use);
+	return 0;
+}
+
 static void maestro_remove(struct pci_dev *pdev);
 
 static struct pci_device_id maestro_r_pci_tbl[] = {
@@ -98,8 +112,8 @@ static struct pci_driver maestro_r_driver = {
 
 static const struct file_operations maestro_fops = {
 	.owner		= THIS_MODULE,
-	.open           = video_exclusive_open,
-	.release        = video_exclusive_release,
+	.open           = maestro_exclusive_open,
+	.release        = maestro_exclusive_release,
 	.ioctl		= video_ioctl2,
 #ifdef CONFIG_COMPAT
 	.compat_ioctl	= v4l_compat_ioctl32,
@@ -196,8 +210,7 @@ static int vidioc_querycap(struct file *file, void  *priv,
 static int vidioc_g_tuner(struct file *file, void *priv,
 					struct v4l2_tuner *v)
 {
-	struct video_device *dev = video_devdata(file);
-	struct radio_device *card = video_get_drvdata(dev);
+	struct radio_device *card = video_drvdata(file);
 
 	if (v->index > 0)
 		return -EINVAL;
@@ -229,8 +242,7 @@ static int vidioc_s_tuner(struct file *file, void *priv,
 static int vidioc_s_frequency(struct file *file, void *priv,
 					struct v4l2_frequency *f)
 {
-	struct video_device *dev = video_devdata(file);
-	struct radio_device *card = video_get_drvdata(dev);
+	struct radio_device *card = video_drvdata(file);
 
 	if (f->frequency < FREQ_LO || f->frequency > FREQ_HI)
 		return -EINVAL;
@@ -241,8 +253,7 @@ static int vidioc_s_frequency(struct file *file, void *priv,
 static int vidioc_g_frequency(struct file *file, void *priv,
 					struct v4l2_frequency *f)
 {
-	struct video_device *dev = video_devdata(file);
-	struct radio_device *card = video_get_drvdata(dev);
+	struct radio_device *card = video_drvdata(file);
 
 	f->type = V4L2_TUNER_RADIO;
 	f->frequency = BITS2FREQ(radio_bits_get(card));
@@ -267,8 +278,7 @@ static int vidioc_queryctrl(struct file *file, void *priv,
 static int vidioc_g_ctrl(struct file *file, void *priv,
 					struct v4l2_control *ctrl)
 {
-	struct video_device *dev = video_devdata(file);
-	struct radio_device *card = video_get_drvdata(dev);
+	struct radio_device *card = video_drvdata(file);
 
 	switch (ctrl->id) {
 	case V4L2_CID_AUDIO_MUTE:
@@ -281,8 +291,7 @@ static int vidioc_g_ctrl(struct file *file, void *priv,
 static int vidioc_s_ctrl(struct file *file, void *priv,
 					struct v4l2_control *ctrl)
 {
-	struct video_device *dev = video_devdata(file);
-	struct radio_device *card = video_get_drvdata(dev);
+	struct radio_device *card = video_drvdata(file);
 	register u16 io = card->io;
 	register u16 omask = inw(io + IO_MASK);
 
@@ -374,6 +383,7 @@ static struct video_device maestro_radio = {
 	.name           = "Maestro radio",
 	.fops           = &maestro_fops,
 	.ioctl_ops 	= &maestro_ioctl_ops,
+	.release	= video_device_release,
 };
 
 static int __devinit maestro_probe(struct pci_dev *pdev,
@@ -409,8 +419,7 @@ static int __devinit maestro_probe(struct pci_dev *pdev,
 	video_set_drvdata(maestro_radio_inst, radio_unit);
 	pci_set_drvdata(pdev, maestro_radio_inst);
 
-	retval = video_register_device(maestro_radio_inst, VFL_TYPE_RADIO,
-		radio_nr);
+	retval = video_register_device(maestro_radio_inst, VFL_TYPE_RADIO, radio_nr);
 	if (retval) {
 		printk(KERN_ERR "can't register video device!\n");
 		goto errfr1;