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ib_umem_dmabuf_map_pages() returns 0 on success and -ERRNO on failure.
dma_resv_wait_timeout() uses a different scheme:
* Returns -ERESTARTSYS if interrupted, 0 if the wait timed out, or
* greater than zero on success.
This results in ib_umem_dmabuf_map_pages() being non-functional as a
positive return will be understood to be an error by drivers.
Fixes: f30bceab16d1 ("RDMA: use dma_resv_wait() instead of extracting the fence")
Cc: stable@kernel.org
Link: https://lore.kernel.org/r/0-v1-d8f4e1fa84c8+17-rdma_dmabuf_fix_jgg@nvidia.com
Tested-by: Maor Gottlieb <maorg@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
b16de8b9e7