Target/iser: Gracefully reject T10-PI enabled connect request if not supported

In case user chose to set T10-PI enable on the target while
the IB device does not support it, gracefully reject the request.

Reported-by: Slava Shwartsman <valyushash@gmail.com>
Signed-off-by: Sagi Grimberg <sagig@mellanox.com>
Cc: stable@vger.kernel.org # 3.15+
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>

diff --git a/drivers/infiniband/ulp/isert/ib_isert.c b/drivers/infiniband/ulp/isert/ib_isert.c
index c68795194e25d182628f3e295894c9c181aa9307..b622783ab198b281b8776433ef05ceaa6f665552 100644 (file)
--- a/drivers/infiniband/ulp/isert/ib_isert.c
+++ b/drivers/infiniband/ulp/isert/ib_isert.c
@@ -663,8 +663,9 @@ isert_connect_request(struct rdma_cm_id *cma_id, struct rdma_cm_event *event)
 
        pi_support = np->tpg_np->tpg->tpg_attrib.t10_pi;
        if (pi_support && !device->pi_capable) {
-               pr_err("Protection information requested but not supported\n");
-               ret = -EINVAL;
+               pr_err("Protection information requested but not supported, "
+                      "rejecting connect request\n");
+               ret = rdma_reject(cma_id, NULL, 0);
                goto out_mr;
        }