[PATCH] RDMA/mlx5: return the EFAULT per ibv_advise_mr(3)

ibv_advise_mr(3) says:
EFAULT In one of the following: o When the range requested is out of the  MR  bounds,
       or  when  parts of it are not part of the process address space. o One of the
       lkeys provided in the scatter gather list is invalid or with wrong write access

Actually get_prefetchable_mr() will return NULL if it see above conditions

Signed-off-by: Li Zhijian <redacted>
---
 drivers/infiniband/hw/mlx5/odp.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/infiniband/hw/mlx5/odp.c b/drivers/infiniband/hw/mlx5/odp.c
index d0d98e584ebc..8d2a626c87cf 100644
--- a/drivers/infiniband/hw/mlx5/odp.c
+++ b/drivers/infiniband/hw/mlx5/odp.c

@@ -1791,7 +1791,7 @@ static int mlx5_ib_prefetch_sg_list(struct ib_pd *pd,
 
 		mr = get_prefetchable_mr(pd, advice, sg_list[i].lkey);
 		if (!mr)
-			return -ENOENT;
+			return -EFAULT;
 		ret = pagefault_mr(mr, sg_list[i].addr, sg_list[i].length,
 				   &bytes_mapped, pf_flags);
 		if (ret < 0) {

-- 
2.30.2