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

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

Acked-by: Sumit Semwal <sumit.semwal@linaro.org>
Acked-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Dmitry Osipenko <dmitry.osipenko@collabora.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221017172229.42269-16-dmitry.osipenko@collabora.com
This commit is contained in:
Dmitry Osipenko 2022-10-17 20:22:23 +03:00
parent 50f0ddcdee
commit 34c7797f9e
1 changed files with 4 additions and 0 deletions
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4
drivers/dma-buf/dma-buf.c
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@ -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));