V4L/DVB (8777): tea575x-tuner: replace video_exclusive_open/release

Move the video_exclusive_open/release functionality into the
driver itself.

Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

2 files changed, 21 insertions, 2 deletions

diff --git a/include/sound/tea575x-tuner.h b/include/sound/tea575x-tuner.h
index b62ce3e077f9..b6870cbaf2b3 100644
--- a/include/sound/tea575x-tuner.h
+++ b/include/sound/tea575x-tuner.h
@@ -43,6 +43,7 @@ struct snd_tea575x {
         unsigned int freq_fixup;        /* crystal onboard */
         unsigned int val;               /* hw value */
         unsigned long freq;             /* frequency */
+        unsigned long in_use;           /* set if the device is in use */
         struct snd_tea575x_ops *ops;
         void *private_data;
 };
diff --git a/sound/i2c/other/tea575x-tuner.c b/sound/i2c/other/tea575x-tuner.c
index 83e90057270e..621d7fe3074b 100644
--- a/sound/i2c/other/tea575x-tuner.c
+++ b/sound/i2c/other/tea575x-tuner.c
@@ -175,6 +175,23 @@ static void snd_tea575x_release(struct video_device *vfd)
 {
 }
 
+static int snd_tea575x_exclusive_open(struct inode *inode, struct file *file)
+{
+        struct video_device *dev = video_devdata(file);
+        struct snd_tea575x *tea = video_get_drvdata(dev);
+
+        return test_and_set_bit(0, &tea->in_use) ? -EBUSY : 0;
+}
+
+static int snd_tea575x_exclusive_release(struct inode *inode, struct file *file)
+{
+        struct video_device *dev = video_devdata(file);
+        struct snd_tea575x *tea = video_get_drvdata(dev);
+
+        clear_bit(0, &tea->in_use);
+        return 0;
+}
+
 /*
  * initialize all the tea575x chips
  */
@@ -193,9 +210,10 @@ 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");