V4L/DVB (6338): ivtv: fix incorrect EBUSY return

Trying to open the radio when a capture is in progress will make it
impossible to open the radio again since the radio stream wasn't released.

Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
diff --git a/drivers/media/video/ivtv/ivtv-fileops.c b/drivers/media/video/ivtv/ivtv-fileops.c
index 0e0605c..24fcbb8 100644
--- a/drivers/media/video/ivtv/ivtv-fileops.c
+++ b/drivers/media/video/ivtv/ivtv-fileops.c
@@ -892,6 +892,7 @@
 			if (atomic_read(&itv->capturing) > 0) {
 				/* switching to radio while capture is
 				   in progress is not polite */
+				ivtv_release_stream(s);
 				kfree(item);
 				return -EBUSY;
 			}