From: Hans Verkuil <hans.verk...@cisco.com>
The start_streaming op is responsible for starting the video dma,
so it shouldn't be called anymore from the buf_queue op.
Unfortunately, this call to start_video_dma() was added to the
start_streaming op, but was forgotten to be removed from the
buf_queue op, which is where it used to be before the vb2 conversion.
Calling this function twice causes very hard to find errors: sometimes
it works, sometimes it doesn't. It took me a whole friggin' day
to track this down, and in the end it was just luck that my eye suddenly
triggered on that line.
Signed-off-by: Hans Verkuil <hans.verk...@cisco.com>
---
drivers/media/pci/cx88/cx88-video.c | 1 -
1 file changed, 1 deletion(-)
diff --git a/drivers/media/pci/cx88/cx88-video.c
b/drivers/media/pci/cx88/cx88-video.c
index 25a4b7f31..860c98fc 100644
--- a/drivers/media/pci/cx88/cx88-video.c
+++ b/drivers/media/pci/cx88/cx88-video.c
@@ -523,7 +523,6 @@ static void buffer_queue(struct vb2_buffer *vb)
if (list_empty(&q->active)) {
list_add_tail(&buf->list, &q->active);
- start_video_dma(dev, q, buf);
buf->count = q->count++;
dprintk(2,"[%p/%d] buffer_queue - first active\n",
buf, buf->vb.v4l2_buf.index);
--
2.1.0
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