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IB/iser: Collapse cleanup and disconnect handlers

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No real need to wait for TIMEWAIT_EXIT before we destroy the RDMA
resources (also TIMEAWAIT_EXIT is not guarenteed to always arrive).  As
for the cma_id, only destroy it if the state is not DOWN where in this
case, conn_release is already running and we don't want to compete.

Signed-off-by: Ariel Nahum <arieln@mellanox.com>
Signed-off-by: Sagi Grimberg <sagig@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
This commit is contained in:
Ariel Nahum 2014-12-07 16:09:54 +02:00 committed by Roland Dreier
parent 16df2a26fb
commit 5426b1711f
1 changed files with 11 additions and 8 deletions
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19
drivers/infiniband/ulp/iser/iser_verbs.c
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@ -629,9 +629,11 @@ void iser_conn_release(struct iser_conn *iser_conn)
mutex_unlock(&ig.connlist_mutex);
mutex_lock(&iser_conn->state_mutex);
if (iser_conn->state != ISER_CONN_DOWN)
if (iser_conn->state != ISER_CONN_DOWN) {
iser_warn("iser conn %p state %d, expected state down.\n",
iser_conn, iser_conn->state);
iser_conn->state = ISER_CONN_DOWN;
}
/*
* In case we never got to bind stage, we still need to
* release IB resources (which is safe to call more than once).
@ -867,20 +869,21 @@ static int iser_cma_handler(struct rdma_cm_id *cma_id, struct rdma_cm_event *eve
break;
case RDMA_CM_EVENT_DISCONNECTED:
case RDMA_CM_EVENT_ADDR_CHANGE:
iser_disconnected_handler(cma_id);
case RDMA_CM_EVENT_TIMEWAIT_EXIT:
iser_cleanup_handler(cma_id, false);
break;
case RDMA_CM_EVENT_DEVICE_REMOVAL:
/*
* we *must* destroy the device as we cannot rely
* on iscsid to be around to initiate error handling.
* also implicitly destroy the cma_id.
* also if we are not in state DOWN implicitly destroy
* the cma_id.
*/
iser_cleanup_handler(cma_id, true);
iser_conn->ib_conn.cma_id = NULL;
ret = 1;
break;
case RDMA_CM_EVENT_TIMEWAIT_EXIT:
iser_cleanup_handler(cma_id, false);
if (iser_conn->state != ISER_CONN_DOWN) {
iser_conn->ib_conn.cma_id = NULL;
ret = 1;
}
break;
default:
iser_err("Unexpected RDMA CM event (%d)\n", event->event);