V4L/DVB (9801): cx18: Allow more than 63 capture buffers in rotation per stream

cx18: Allow more than 63 capture buffers in rotation per stream.  Implement
q_busy to hold buffers the firmware has for use.  q_free holds truly unused
buffers in a pool.  New buffers are given to the firmware as soon as the
firmware returns one, if there are any to give to the firmware.

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

1 files changed, 8 insertions, 8 deletions

diff --git a/drivers/media/video/cx18/cx18-queue.h b/drivers/media/video/cx18/cx18-queue.h
index d184e55ce624..456cec3bc28f 100644
--- a/drivers/media/video/cx18/cx18-queue.h
+++ b/drivers/media/video/cx18/cx18-queue.h
@@ -43,21 +43,21 @@ 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_enqueue(struct cx18_stream *s, struct cx18_buffer *buf,
-                   struct cx18_queue *q, int to_front);
+struct cx18_queue *_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 *cx18_enqueue(struct cx18_stream *s, struct cx18_buffer *buf,
+                                struct cx18_queue *q)
 {
-        _cx18_enqueue(s, buf, q, 0); /* FIFO */
+        return _cx18_enqueue(s, buf, q, 0); /* FIFO */
 }
 
 static inline
-void cx18_push(struct cx18_stream *s, struct cx18_buffer *buf,
-               struct cx18_queue *q)
+struct cx18_queue *cx18_push(struct cx18_stream *s, struct cx18_buffer *buf,
+                             struct cx18_queue *q)
 {
-        _cx18_enqueue(s, buf, q, 1); /* LIFO */
+        return _cx18_enqueue(s, buf, q, 1); /* LIFO */
 }
 
 void cx18_queue_init(struct cx18_queue *q);