merge: http://linuxtv.org/hg/~gliakhovetski/v4l-dvb

From: Mauro Carvalho Chehab <mchehab@infradead.org>



Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

1 files changed, 28 insertions, 5 deletions

diff --git a/linux/sound/i2c/other/tea575x-tuner.c b/linux/sound/i2c/other/tea575x-tuner.c
index c4bd65c94..2d07c8ea5 100644
--- a/linux/sound/i2c/other/tea575x-tuner.c
+++ b/linux/sound/i2c/other/tea575x-tuner.c
@@ -92,11 +92,10 @@ static void snd_tea575x_set_freq(struct snd_tea575x *tea)
 static int snd_tea575x_ioctl(struct inode *inode, struct file *file,
 			     unsigned int cmd, unsigned long data)
 {
-	struct video_device *dev = video_devdata(file);
 #if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,17)
-	tea575x_t *tea = video_get_drvdata(dev);
+	tea575x_t *tea = video_drvdata(file);
 #else
-	struct snd_tea575x *tea = video_get_drvdata(dev);
+	struct snd_tea575x *tea = video_drvdata(file);
 #endif
 	void __user *arg = (void __user *)data;
 
@@ -186,6 +185,29 @@ static void snd_tea575x_release(struct video_device *vfd)
 {
 }
 
+static int snd_tea575x_exclusive_open(struct inode *inode, struct file *file)
+{
+#if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,17)
+	tea575x_t *tea = video_drvdata(file);
+#else
+	struct snd_tea575x *tea = video_drvdata(file);
+#endif
+
+	return test_and_set_bit(0, &tea->in_use) ? -EBUSY : 0;
+}
+
+static int snd_tea575x_exclusive_release(struct inode *inode, struct file *file)
+{
+#if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,17)
+	tea575x_t *tea = video_drvdata(file);
+#else
+	struct snd_tea575x *tea = video_drvdata(file);
+#endif
+
+	clear_bit(0, &tea->in_use);
+	return 0;
+}
+
 /*
  * initialize all the tea575x chips
  */
@@ -208,9 +230,10 @@ void snd_tea575x_init(struct snd_tea575x *tea)
 	tea->vd.release = snd_tea575x_release;
 	video_set_drvdata(&tea->vd, tea);
 	tea->vd.fops = &tea->fops;
+	tea->in_use = 0;
 	tea->fops.owner = tea->card->module;
-	tea->fops.open = video_exclusive_open;
-	tea->fops.release = video_exclusive_release;
+	tea->fops.open = snd_tea575x_exclusive_open;
+	tea->fops.release = snd_tea575x_exclusive_release;
 	tea->fops.ioctl = snd_tea575x_ioctl;
 	if (video_register_device(&tea->vd, VFL_TYPE_RADIO, tea->dev_nr - 1) < 0) {
 		snd_printk(KERN_ERR "unable to register tea575x tuner\n");