1 files changed, 24 insertions, 16 deletions

diff --git a/drivers/media/radio/radio-aztech.c b/drivers/media/radio/radio-aztech.c
index 628c689e3ffe..d78489573230 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;
@@ -195,8 +196,7 @@ 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 az_device *az = dev->priv;
+        struct az_device *az = video_drvdata(file);
 
         if (v->index > 0)
                 return -EINVAL;
@@ -264,8 +264,7 @@ static int vidioc_s_audio (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 az_device *az = dev->priv;
+        struct az_device *az = video_drvdata(file);
 
         az->curfreq = f->frequency;
         az_setfreq(az, az->curfreq);
@@ -275,8 +274,7 @@ 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 az_device *az = dev->priv;
+        struct az_device *az = video_drvdata(file);
 
         f->type = V4L2_TUNER_RADIO;
         f->frequency = az->curfreq;
@@ -302,8 +300,7 @@ 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 az_device *az = dev->priv;
+        struct az_device *az = video_drvdata(file);
 
         switch (ctrl->id) {
                 case V4L2_CID_AUDIO_MUTE:
@@ -322,8 +319,7 @@ 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 az_device *az = dev->priv;
+        struct az_device *az = video_drvdata(file);
 
         switch (ctrl->id) {
                 case V4L2_CID_AUDIO_MUTE:
@@ -342,10 +338,21 @@ 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,
@@ -369,9 +376,10 @@ static const struct v4l2_ioctl_ops aztech_ioctl_ops = {
 };
 
 static struct video_device aztech_radio = {
-        .name               = "Aztech radio",
-        .fops               = &aztech_fops,
-        .ioctl_ops          = &aztech_ioctl_ops,
+        .name           = "Aztech radio",
+        .fops           = &aztech_fops,
+        .ioctl_ops      = &aztech_ioctl_ops,
+        .release        = video_device_release_empty,
 };
 
 module_param_named(debug,aztech_radio.debug, int, 0644);
@@ -392,7 +400,7 @@ static int __init aztech_init(void)
         }
 
         mutex_init(&lock);
-        aztech_radio.priv=&aztech_unit;
+        video_set_drvdata(&aztech_radio, &aztech_unit);
 
         if (video_register_device(&aztech_radio, VFL_TYPE_RADIO, radio_nr) < 0) {
                 release_region(io,2);