V4L/DVB (5545): Saa7146: Release capture buffers on device close

If the video device (saa7146 on a FF card) was open for capturing,
the close call didn't release the capture buffers.

Signed-off-by: Hartmut Birr <e9hack@gmail.com>
Signed-off-by: Oliver Endriss <o.endriss@gmx.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

1 files changed, 6 insertions, 0 deletions

diff --git a/drivers/media/common/saa7146_video.c b/drivers/media/common/saa7146_video.c
index 7e0cedc557df..e3d04a4cef4d 100644
--- a/drivers/media/common/saa7146_video.c
+++ b/drivers/media/common/saa7146_video.c
@@ -1428,6 +1428,7 @@ static void video_close(struct saa7146_dev *dev, struct file *file)
 {
         struct saa7146_fh *fh = (struct saa7146_fh *)file->private_data;
         struct saa7146_vv *vv = dev->vv_data;
+        struct videobuf_queue *q = &fh->video_q;
         int err;
 
         if (IS_CAPTURE_ACTIVE(fh) != 0) {
@@ -1436,6 +1437,11 @@ static void video_close(struct saa7146_dev *dev, struct file *file)
                 err = saa7146_stop_preview(fh);
         }
 
+        // release all capture buffers
+        mutex_lock(&q->lock);
+        videobuf_read_stop(q);
+        mutex_unlock(&q->lock);
+
         /* hmm, why is this function declared void? */
         /* return err */
 }