From 31901a078af29c33c736dcbf815656920e904632 Mon Sep 17 00:00:00 2001 From: Marek Szyprowski Date: Fri, 11 Mar 2011 06:07:27 -0300 Subject: [PATCH] [media] v4l2: vb2: one more fix for REQBUFS() Return immediately 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 Signed-off-by: Kyungmin Park Signed-off-by: Mauro Carvalho Chehab --- drivers/media/video/videobuf2-core.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/drivers/media/video/videobuf2-core.c b/drivers/media/video/videobuf2-core.c index c5f99c7d3979..2baf7dbdc01d 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 immediately. + */ + 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 -- 2.20.1