[PATCH v4 15/21] dma-buf: Move dma_buf_vmap() to dynamic locking specification

[Dmitry Osipenko]

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

Acked-by: Christian König <christian.koe...@amd.com>
Signed-off-by: Dmitry Osipenko <dmitry.osipe...@collabora.com>
---
 drivers/dma-buf/dma-buf.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/dma-buf/dma-buf.c b/drivers/dma-buf/dma-buf.c
index 51fb69048853..ceea4839c641 100644
--- a/drivers/dma-buf/dma-buf.c
+++ b/drivers/dma-buf/dma-buf.c
@@ -1449,6 +1449,8 @@ 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;
 
@@ -1509,6 +1511,8 @@ 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));
-- 
2.37.2