RDMA/rtrs-srv: Correct the checking of ib_map_mr_sg

We should check with nr_sgt, also the only successful case is that
all sg elements are mapped, so make it explicitly.

Acked-by: Jack Wang <jinpu.wang@ionos.com>
Signed-off-by: Guoqing Jiang <guoqing.jiang@linux.dev>
Link: https://lore.kernel.org/r/20221117101945.6317-4-guoqing.jiang@linux.dev
Signed-off-by: Leon Romanovsky <leon@kernel.org>

diff --git a/drivers/infiniband/ulp/rtrs/rtrs-srv.c b/drivers/infiniband/ulp/rtrs/rtrs-srv.c
index b877dd57b6b92393a18666ed21f2782245a9c5ad..581c850e71d64e8185d4a54c026e68980b8a2d95 100644 (file)
--- a/drivers/infiniband/ulp/rtrs/rtrs-srv.c
+++ b/drivers/infiniband/ulp/rtrs/rtrs-srv.c
@@ -622,7 +622,7 @@ static int map_cont_bufs(struct rtrs_srv_path *srv_path)
                }
                nr = ib_map_mr_sg(mr, sgt->sgl, nr_sgt,
                                  NULL, max_chunk_size);
-               if (nr < 0 || nr < sgt->nents) {
+               if (nr != nr_sgt) {
                        err = nr < 0 ? nr : -EINVAL;
                        goto dereg_mr;
                }