Return immedietely if the target number of buffers is the same as
the current one and memory access type doesn't change.
Signed-off-by: Marek Szyprowski <m.szyprowski@xxxxxxxxxxx>
Signed-off-by: Kyungmin Park <kyungmin.park@xxxxxxxxxxx>
---
drivers/media/video/videobuf2-core.c | 7 +++++++
1 files changed, 7 insertions(+), 0 deletions(-)
diff --git a/drivers/media/video/videobuf2-core.c b/drivers/media/video/videobuf2-core.c
index c5f99c7..9df484d 100644
--- a/drivers/media/video/videobuf2-core.c
+++ b/drivers/media/video/videobuf2-core.c
@@ -488,6 +488,13 @@ int vb2_reqbufs(struct vb2_queue *q, struct v4l2_requestbuffers *req)
return -EINVAL;
}
+ /*
+ * If the same number of buffers and memory access method is requested
+ * then return immedietely.
+ */
+ if (q->memory == req->memory && req->count == q->num_buffers)
+ return 0;
+
if (req->count == 0 || q->num_buffers != 0 || q->memory != req->memory) {
/*
* We already have buffers allocated, so first check if they
--
1.7.1.569.g6f426
--
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