RDMA/umem: Use dma-buf locked API to solve deadlock

The cited commit moves umem to call the unlocked versions of dmabuf
unmap/map attachment, but the lock is held while calling to these
functions, hence move back to the locked versions of these APIs.

Fixes: 21c9c5c ("RDMA/umem: Prepare to dynamic dma-buf locking specification")
Link: https://lore.kernel.org/r/311c2cb791f8af75486df446819071357353db1b.1675088709.git.leon@kernel.org
Signed-off-by: Maor Gottlieb <[email protected]>
Reviewed-by: Christian König <[email protected]>
Signed-off-by: Leon Romanovsky <[email protected]>
Reviewed-by: Dmitry Osipenko <[email protected]>
Signed-off-by: Jason Gunthorpe <[email protected]>

Author: maorgottlieb

drivers/infiniband/core/umem_dmabuf.c

@@ -26,8 +26,8 @@ int ib_umem_dmabuf_map_pages(struct ib_umem_dmabuf *umem_dmabuf)
 	if (umem_dmabuf->sgt)
 		goto wait_fence;
 
-	sgt = dma_buf_map_attachment_unlocked(umem_dmabuf->attach,
-					      DMA_BIDIRECTIONAL);
+	sgt = dma_buf_map_attachment(umem_dmabuf->attach,
+				     DMA_BIDIRECTIONAL);
 	if (IS_ERR(sgt))
 		return PTR_ERR(sgt);
 
@@ -103,8 +103,8 @@ void ib_umem_dmabuf_unmap_pages(struct ib_umem_dmabuf *umem_dmabuf)
 		umem_dmabuf->last_sg_trim = 0;
 	}
 
-	dma_buf_unmap_attachment_unlocked(umem_dmabuf->attach, umem_dmabuf->sgt,
-					  DMA_BIDIRECTIONAL);
+	dma_buf_unmap_attachment(umem_dmabuf->attach, umem_dmabuf->sgt,
+				 DMA_BIDIRECTIONAL);
 
 	umem_dmabuf->sgt = NULL;
 }