cifs: smbd: disconnect transport on RDMA errors

On RDMA errors, transport should disconnect the RDMA CM connection. This
will notify the upper layer, and it will attempt transport reconnect.

Signed-off-by: Long Li <longli@microsoft.com>
Signed-off-by: Steve French <smfrench@gmail.com>
Reviewed-by: Ronnie Sahlberg <lsahlber@redhat.com>
CC: Stable <stable@vger.kernel.org>

diff --git a/fs/cifs/smbdirect.c b/fs/cifs/smbdirect.c
index 3f7883e..5008af5 100644 (file)
--- a/fs/cifs/smbdirect.c
+++ b/fs/cifs/smbdirect.c
@@ -862,6 +862,8 @@ static int smbd_post_send_negotiate_req(struct smbd_connection *info)
        ib_dma_unmap_single(info->id->device, request->sge[0].addr,
                request->sge[0].length, DMA_TO_DEVICE);
 
+       smbd_disconnect_rdma_connection(info);
+
 dma_mapping_failed:
        mempool_free(request, info->request_mempool);
        return rc;
@@ -1061,6 +1063,7 @@ static int smbd_post_send(struct smbd_connection *info,
                        if (atomic_dec_and_test(&info->send_pending))
                                wake_up(&info->wait_send_pending);
                }
+               smbd_disconnect_rdma_connection(info);
        } else
                /* Reset timer for idle connection after packet is sent */
                mod_delayed_work(info->workqueue, &info->idle_timer_work,
@@ -1202,7 +1205,7 @@ static int smbd_post_recv(
        if (rc) {
                ib_dma_unmap_single(info->id->device, response->sge.addr,
                                    response->sge.length, DMA_FROM_DEVICE);
-
+               smbd_disconnect_rdma_connection(info);
                log_rdma_recv(ERR, "ib_post_recv failed rc=%d\n", rc);
        }
 
@@ -2546,6 +2549,8 @@ dma_map_error:
        if (atomic_dec_and_test(&info->mr_used_count))
                wake_up(&info->wait_for_mr_cleanup);
 
+       smbd_disconnect_rdma_connection(info);
+
        return NULL;
 }