vdpa/mlx5: Set err = -ENOMEM in case dma_map_sg_attrs fails

[ Upstream commit be286f84e33da1a7f83142b64dbd86f600e73363 ]

Set err = -ENOMEM if dma_map_sg_attrs() fails so the function reutrns
error.

Fixes: 94abbccdf291 ("vdpa/mlx5: Add shared memory registration code")
Signed-off-by: Eli Cohen <elic@nvidia.com>
Reported-by: kernel test robot <lkp@intel.com>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Link: https://lore.kernel.org/r/20210411083646.910546-1-elic@nvidia.com
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/vdpa/mlx5/core/mr.c b/drivers/vdpa/mlx5/core/mr.c
index d300f79..aa656f5 100644 (file)
--- a/drivers/vdpa/mlx5/core/mr.c
+++ b/drivers/vdpa/mlx5/core/mr.c
@@ -273,8 +273,10 @@ done:
        mr->log_size = log_entity_size;
        mr->nsg = nsg;
        mr->nent = dma_map_sg_attrs(dma, mr->sg_head.sgl, mr->nsg, DMA_BIDIRECTIONAL, 0);
-       if (!mr->nent)
+       if (!mr->nent) {
+               err = -ENOMEM;
                goto err_map;
+       }
 
        err = create_direct_mr(mvdev, mr);
        if (err)