Commit 34c7797f authored by Dmitry Osipenko's avatar Dmitry Osipenko
Browse files

dma-buf: Move dma_buf_vmap() to dynamic locking specification 



Move dma_buf_vmap/vunmap() functions to the dynamic locking
specification by asserting that the reservation lock is held.

Acked-by: default avatarSumit Semwal <sumit.semwal@linaro.org>
Acked-by: default avatarChristian König <christian.koenig@amd.com>
Signed-off-by: default avatarDmitry Osipenko <dmitry.osipenko@collabora.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221017172229.42269-16-dmitry.osipenko@collabora.com
parent 50f0ddcd

drivers/dma-buf/dma-buf.c

+4 −0
Original line number Diff line number Diff line
@@ -1450,6 +1450,8 @@ int dma_buf_vmap(struct dma_buf *dmabuf, struct iosys_map *map) 
	if (WARN_ON(!dmabuf))

		return -EINVAL;



	dma_resv_assert_held(dmabuf->resv);



	if (!dmabuf->ops->vmap)

		return -EINVAL;
@@ -1515,6 +1517,8 @@ void dma_buf_vunmap(struct dma_buf *dmabuf, struct iosys_map *map) 
	if (WARN_ON(!dmabuf))

		return;



	dma_resv_assert_held(dmabuf->resv);



	BUG_ON(iosys_map_is_null(&dmabuf->vmap_ptr));

	BUG_ON(dmabuf->vmapping_counter == 0);

	BUG_ON(!iosys_map_is_equal(&dmabuf->vmap_ptr, map));