[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 <m.szyprowski@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
diff --git a/drivers/media/video/videobuf2-core.c b/drivers/media/video/videobuf2-core.c
index c5f99c7..2baf7db 100644
--- a/drivers/media/video/videobuf2-core.c
+++ b/drivers/media/video/videobuf2-core.c
@@ -488,6 +488,13 @@
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