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, 2 insertions, 1 deletions

diff --git a/drivers/media/video/cx18/cx18-driver.h b/drivers/media/video/cx18/cx18-driver.h
index f88d82348293..4d56d07195b6 100644
--- a/drivers/media/video/cx18/cx18-driver.h
+++ b/drivers/media/video/cx18/cx18-driver.h
@@ -289,7 +289,8 @@ struct cx18_stream {
 
         /* Buffer Queues */
         struct cx18_queue q_free;       /* free buffers */
-        struct cx18_queue q_full;       /* full buffers */
+        struct cx18_queue q_busy;       /* busy buffers - in use by firmware */
+        struct cx18_queue q_full;       /* full buffers - data for user apps */
 
         /* DVB / Digital Transport */
         struct cx18_dvb dvb;