IB/iser: Replace connection waitqueue with completion object
Instead of waiting for events and condition changes of the iser
connection state, we wait for explicit completion of connection
establishment and teardown.
Separate connection establishment wait object from the teardown object
to avoid a situation where racing connection establishment and
teardown may concurrently wakeup each other.
ep_poll will wait for up_completion invoked by
iser_connected_handler() and iser release worker will wait for
flush_completion before releasing the connection.
Bound the completion wait with a 30 seconds timeout for cases where
iscsid (the user space iscsi daemon) is too slow or gone.
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>
diff --git a/drivers/infiniband/ulp/iser/iscsi_iser.c b/drivers/infiniband/ulp/iser/iscsi_iser.c
index 3dc853c..61ee91d 100644
--- a/drivers/infiniband/ulp/iser/iscsi_iser.c
+++ b/drivers/infiniband/ulp/iser/iscsi_iser.c
@@ -627,10 +627,8 @@
int rc;
ib_conn = ep->dd_data;
- rc = wait_event_interruptible_timeout(ib_conn->wait,
- ib_conn->state == ISER_CONN_UP,
- msecs_to_jiffies(timeout_ms));
-
+ rc = wait_for_completion_interruptible_timeout(&ib_conn->up_completion,
+ msecs_to_jiffies(timeout_ms));
/* if conn establishment failed, return error code to iscsi */
if (rc == 0) {
mutex_lock(&ib_conn->state_mutex);
@@ -661,9 +659,10 @@
iser_conn_terminate(ib_conn);
/*
- * if iser_conn and iscsi_conn are bound, we must wait iscsi_conn_stop
- * call and ISER_CONN_DOWN state before freeing the iser resources.
- * otherwise we are safe to free resources immediately.
+ * if iser_conn and iscsi_conn are bound, we must wait for
+ * iscsi_conn_stop and flush errors completion before freeing
+ * the iser resources. Otherwise we are safe to free resources
+ * immediately.
*/
if (ib_conn->iscsi_conn) {
INIT_WORK(&ib_conn->release_work, iser_release_work);