The patch below does not apply to the 3.10-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <[email protected]>.
thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From 88c4015fda6d014392f76d3b1688347950d7a12d Mon Sep 17 00:00:00 2001 From: Sagi Grimberg <[email protected]> Date: Mon, 19 May 2014 17:44:24 +0300 Subject: [PATCH] Target/iser: Improve cm events handling There are 4 RDMA_CM events that all basically mean that the user should teardown the IB connection: - DISCONNECTED - ADDR_CHANGE - DEVICE_REMOVAL - TIMEWAIT_EXIT Only in DISCONNECTED/ADDR_CHANGE it makes sense to call rdma_disconnect (send DREQ/DREP to our initiator). So we keep the same teardown handler for all of them but only indicate calling rdma_disconnect for the relevant events. This patch also removes redundant debug prints for each single event. v2 changes: - Call isert_disconnected_handler() for DEVICE_REMOVAL (Or + Sag) Signed-off-by: Sagi Grimberg <[email protected]> Cc: [email protected] # 3.10+ Signed-off-by: Nicholas Bellinger <[email protected]> diff --git a/drivers/infiniband/ulp/isert/ib_isert.c b/drivers/infiniband/ulp/isert/ib_isert.c index ef73a38bcb6b..ef47ff66f8df 100644 --- a/drivers/infiniband/ulp/isert/ib_isert.c +++ b/drivers/infiniband/ulp/isert/ib_isert.c @@ -788,8 +788,10 @@ isert_disconnect_work(struct work_struct *work) return; } - /* Send DREQ/DREP towards our initiator */ - rdma_disconnect(isert_conn->conn_cm_id); + if (isert_conn->disconnect) { + /* Send DREQ/DREP towards our initiator */ + rdma_disconnect(isert_conn->conn_cm_id); + } mutex_unlock(&isert_conn->conn_mutex); @@ -799,10 +801,11 @@ wake_up: } static void -isert_disconnected_handler(struct rdma_cm_id *cma_id) +isert_disconnected_handler(struct rdma_cm_id *cma_id, bool disconnect) { struct isert_conn *isert_conn = (struct isert_conn *)cma_id->context; + isert_conn->disconnect = disconnect; INIT_WORK(&isert_conn->conn_logout_work, isert_disconnect_work); schedule_work(&isert_conn->conn_logout_work); } @@ -811,29 +814,28 @@ static int isert_cma_handler(struct rdma_cm_id *cma_id, struct rdma_cm_event *event) { int ret = 0; + bool disconnect = false; pr_debug("isert_cma_handler: event %d status %d conn %p id %p\n", event->event, event->status, cma_id->context, cma_id); switch (event->event) { case RDMA_CM_EVENT_CONNECT_REQUEST: - pr_debug("RDMA_CM_EVENT_CONNECT_REQUEST: >>>>>>>>>>>>>>>\n"); ret = isert_connect_request(cma_id, event); break; case RDMA_CM_EVENT_ESTABLISHED: - pr_debug("RDMA_CM_EVENT_ESTABLISHED >>>>>>>>>>>>>>\n"); isert_connected_handler(cma_id); break; - case RDMA_CM_EVENT_DISCONNECTED: - pr_debug("RDMA_CM_EVENT_DISCONNECTED: >>>>>>>>>>>>>>\n"); - isert_disconnected_handler(cma_id); - break; - case RDMA_CM_EVENT_DEVICE_REMOVAL: - case RDMA_CM_EVENT_ADDR_CHANGE: + case RDMA_CM_EVENT_ADDR_CHANGE: /* FALLTHRU */ + case RDMA_CM_EVENT_DISCONNECTED: /* FALLTHRU */ + case RDMA_CM_EVENT_DEVICE_REMOVAL: /* FALLTHRU */ + disconnect = true; + case RDMA_CM_EVENT_TIMEWAIT_EXIT: /* FALLTHRU */ + isert_disconnected_handler(cma_id, disconnect); break; case RDMA_CM_EVENT_CONNECT_ERROR: default: - pr_err("Unknown RDMA CMA event: %d\n", event->event); + pr_err("Unhandled RDMA CMA event: %d\n", event->event); break; } diff --git a/drivers/infiniband/ulp/isert/ib_isert.h b/drivers/infiniband/ulp/isert/ib_isert.h index a2e926452f76..04f51f7bf614 100644 --- a/drivers/infiniband/ulp/isert/ib_isert.h +++ b/drivers/infiniband/ulp/isert/ib_isert.h @@ -150,6 +150,7 @@ struct isert_conn { #define ISERT_COMP_BATCH_COUNT 8 int conn_comp_batch; struct llist_head conn_comp_llist; + bool disconnect; }; #define ISERT_MAX_CQ 64 -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
