[media] cx25821: the audio channel was registered as a video node

Skip the audio channel when registering the video nodes. This fixes a bug
where that incorrectly registered 'video' node was never unregistered.
Note: this bug only surfaces if the video output nodes are enabled again
after the previous patch disabled them.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/pci/cx25821/cx25821-core.c

@@ -1051,11 +1051,9 @@ void cx25821_dev_unregister(struct cx25821_dev *dev)
 	if (!atomic_dec_and_test(&dev->refcount))
 		return;
 
-	for (i = 0; i < VID_CHANNEL_NUM; i++)
-		cx25821_video_unregister(dev, i);
-
-	for (i = VID_UPSTREAM_SRAM_CHANNEL_I;
-	     i <= AUDIO_UPSTREAM_SRAM_CHANNEL_B; i++) {
+	for (i = 0; i < MAX_VID_CHANNEL_NUM - 1; i++) {
+		if (i == SRAM_CH08) /* audio channel */
+			continue;
 		cx25821_video_unregister(dev, i);
 	}
 

drivers/media/pci/cx25821/cx25821-video.c

@@ -462,6 +462,9 @@ int cx25821_video_register(struct cx25821_dev *dev)
 	spin_lock_init(&dev->slock);
 
 	for (i = 0; i < VID_CHANNEL_NUM; ++i) {
+		if (i == SRAM_CH08) /* audio channel */
+			continue;
+
 		cx25821_init_controls(dev, i);
 
 		cx25821_risc_stopper(dev->pci, &dev->channels[i].vidq.stopper,
@@ -788,7 +791,7 @@ static int video_open(struct file *file)
 	{
 		h = list_entry(list, struct cx25821_dev, devlist);
 
-		for (i = 0; i < MAX_VID_CHANNEL_NUM; i++) {
+		for (i = 0; i < MAX_VID_CHANNEL_NUM - 1; i++) {
 			if (h->channels[i].video_dev &&
 			    h->channels[i].video_dev->minor == minor) {
 				dev = h;