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>

diff --git a/drivers/media/common/saa7146_video.c b/drivers/media/common/saa7146_video.c
index 7e0cedc..e3d04a4 100644 (file)
--- 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 */
 }