RDMA/rtrs-clt: Use rdma_event_msg in log

It's easier to understand a string instead of enum.

Link: https://lore.kernel.org/r/20210222141551.54345-2-jinpu.wang@cloud.ionos.com
Signed-off-by: Jack Wang <jinpu.wang@cloud.ionos.com>
Reviewed-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>

drivers/infiniband/ulp/rtrs/rtrs-clt.c

@@ -1853,12 +1853,14 @@ static int rtrs_clt_rdma_cm_handler(struct rdma_cm_id *cm_id,
 	case RDMA_CM_EVENT_UNREACHABLE:
 	case RDMA_CM_EVENT_ADDR_CHANGE:
 	case RDMA_CM_EVENT_TIMEWAIT_EXIT:
-		rtrs_wrn(s, "CM error event %d\n", ev->event);
+		rtrs_wrn(s, "CM error (CM event: %s, err: %d)\n",
+			 rdma_event_msg(ev->event), ev->status);
 		cm_err = -ECONNRESET;
 		break;
 	case RDMA_CM_EVENT_ADDR_ERROR:
 	case RDMA_CM_EVENT_ROUTE_ERROR:
-		rtrs_wrn(s, "CM error event %d\n", ev->event);
+		rtrs_wrn(s, "CM error (CM event: %s, err: %d)\n",
+			 rdma_event_msg(ev->event), ev->status);
 		cm_err = -EHOSTUNREACH;
 		break;
 	case RDMA_CM_EVENT_DEVICE_REMOVAL:
@@ -1868,7 +1870,8 @@ static int rtrs_clt_rdma_cm_handler(struct rdma_cm_id *cm_id,
 		rtrs_clt_close_conns(sess, false);
 		return 0;
 	default:
-		rtrs_err(s, "Unexpected RDMA CM event (%d)\n", ev->event);
+		rtrs_err(s, "Unexpected RDMA CM error (CM event: %s, err: %d)\n",
+			 rdma_event_msg(ev->event), ev->status);
 		cm_err = -ECONNRESET;
 		break;
 	}