Set vb2_queue.gfp_flags to GFP_DMA32. Otherwise it will start to
create bounce buffers which is something you want to avoid since
those are in limited supply.
Without this patch, DMA scatter-gather may not work because
machines can ran out of buffers easily.
Signed-off-by: Ezequiel Garcia <ezequiel@xxxxxxxxxxxxxxxxxxxx>
--
Hans,
Feel free to squash this patch into the previous patch,
or to apply it independently.
Thanks,
Ezequiel
---
drivers/media/pci/tw686x/tw686x-video.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/media/pci/tw686x/tw686x-video.c b/drivers/media/pci/tw686x/tw686x-video.c
index a3505aa66b77..19a348fe04e3 100644
--- a/drivers/media/pci/tw686x/tw686x-video.c
+++ b/drivers/media/pci/tw686x/tw686x-video.c
@@ -848,6 +848,7 @@ int tw686x_video_init(struct tw686x_dev *dev)
vc->vidq.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
vc->vidq.min_buffers_needed = 2;
vc->vidq.lock = &vc->vb_mutex;
+ vc->vidq.gfp_flags = GFP_DMA32;
err = vb2_queue_init(&vc->vidq);
if (err) {
--
2.7.0
--
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