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@@ -175,6 +175,23 @@ static void snd_tea575x_release(struct video_device *vfd)
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{
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}
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+static int snd_tea575x_exclusive_open(struct inode *inode, struct file *file)
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+{
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+ struct video_device *dev = video_devdata(file);
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+ struct snd_tea575x *tea = video_get_drvdata(dev);
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+
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+ return test_and_set_bit(0, &tea->in_use) ? -EBUSY : 0;
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+}
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+
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+static int snd_tea575x_exclusive_release(struct inode *inode, struct file *file)
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+{
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+ struct video_device *dev = video_devdata(file);
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+ struct snd_tea575x *tea = video_get_drvdata(dev);
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+
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+ clear_bit(0, &tea->in_use);
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+ return 0;
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+}
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+
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/*
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* initialize all the tea575x chips
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*/
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@@ -193,9 +210,10 @@ void snd_tea575x_init(struct snd_tea575x *tea)
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tea->vd.release = snd_tea575x_release;
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video_set_drvdata(&tea->vd, tea);
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tea->vd.fops = &tea->fops;
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+ tea->in_use = 0;
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tea->fops.owner = tea->card->module;
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- tea->fops.open = video_exclusive_open;
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- tea->fops.release = video_exclusive_release;
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+ tea->fops.open = snd_tea575x_exclusive_open;
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+ tea->fops.release = snd_tea575x_exclusive_release;
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tea->fops.ioctl = snd_tea575x_ioctl;
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if (video_register_device(&tea->vd, VFL_TYPE_RADIO, tea->dev_nr - 1) < 0) {
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snd_printk(KERN_ERR "unable to register tea575x tuner\n");
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