V4L/DVB (9800): cx18: Eliminate q_io from stream buffer handling

Eliminate q_io from stream buffer handling in anticipation of upcoming
changes in buffer handling.  q_io was a holdover from ivtv and it's function
in cx18 was trivial and not necessary.  We just push things back onto the
front of q_full now, instead of maintaining a 1 buffer q_io queue.

Signed-off-by: Andy Walls <awalls@radix.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 17 insertions, 2 deletions

diff --git a/drivers/media/video/cx18/cx18-queue.h b/drivers/media/video/cx18/cx18-queue.h
index ff50a2b7e5bc..d184e55ce624 100644
--- a/drivers/media/video/cx18/cx18-queue.h
+++ b/drivers/media/video/cx18/cx18-queue.h
@@ -43,9 +43,24 @@ static inline void cx18_buf_sync_for_device(struct cx18_stream *s,
 void cx18_buf_swap(struct cx18_buffer *buf);
 
 /* cx18_queue utility functions */
-void cx18_queue_init(struct cx18_queue *q);
+void _cx18_enqueue(struct cx18_stream *s, struct cx18_buffer *buf,
+		   struct cx18_queue *q, int to_front);
+
+static inline
 void cx18_enqueue(struct cx18_stream *s, struct cx18_buffer *buf,
-	struct cx18_queue *q);
+		  struct cx18_queue *q)
+{
+	_cx18_enqueue(s, buf, q, 0); /* FIFO */
+}
+
+static inline
+void cx18_push(struct cx18_stream *s, struct cx18_buffer *buf,
+	       struct cx18_queue *q)
+{
+	_cx18_enqueue(s, buf, q, 1); /* LIFO */
+}
+
+void cx18_queue_init(struct cx18_queue *q);
 struct cx18_buffer *cx18_dequeue(struct cx18_stream *s, struct cx18_queue *q);
 struct cx18_buffer *cx18_queue_get_buf(struct cx18_stream *s, u32 id,
 	u32 bytesused);