[PATCH 4.4 107/113] scsi: Revert "RDMA/isert: Fix a recently introduced regression related to logout"

Greg Kroah-Hartman
2020-02-27T14:47:17Z

From: Bart Van Assche <bvanassche@acm.org>

commit 76261ada16dcc3be610396a46d35acc3efbda682 upstream.

Since commit 04060db41178 introduces soft lockups when toggling network
interfaces, revert it.

Link: https://marc.info/?l=target-devel&m=158157054906196
Cc: Rahul Kundu <rahul.kundu@chelsio.com>
Cc: Mike Marciniszyn <mike.marciniszyn@intel.com>
Cc: Sagi Grimberg <sagi@grimberg.me>
Reported-by: Dakshaja Uppalapati <dakshaja@chelsio.com>
Fixes: 04060db41178 ("scsi: RDMA/isert: Fix a recently introduced regression related to logout")
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
drivers/infiniband/ulp/isert/ib_isert.c | 12 ++++++++++++
drivers/target/iscsi/iscsi_target.c | 6 +++---
2 files changed, 15 insertions(+), 3 deletions(-)

--- a/drivers/infiniband/ulp/isert/ib_isert.c
+++ b/drivers/infiniband/ulp/isert/ib_isert.c
@@ -3295,6 +3295,17 @@ isert_wait4flush(struct isert_conn *iser
wait_for_completion(&isert_conn->wait_comp_err);
}

+static void
+isert_wait4cmds(struct iscsi_conn *conn)
+{
+ isert_info("iscsi_conn %p\n", conn);
+
+ if (conn->sess) {
+ target_sess_cmd_list_set_waiting(conn->sess->se_sess);
+ target_wait_for_sess_cmds(conn->sess->se_sess);
+ }
+}
+
/**
* isert_put_unsol_pending_cmds() - Drop commands waiting for
* unsolicitate dataout
@@ -3350,6 +3361,7 @@ static void isert_wait_conn(struct iscsi

isert_wait4flush(isert_conn);
isert_put_unsol_pending_cmds(conn);
+ isert_wait4cmds(conn);
isert_wait4logout(isert_conn);

queue_work(isert_release_wq, &isert_conn->release_work);
--- a/drivers/target/iscsi/iscsi_target.c
+++ b/drivers/target/iscsi/iscsi_target.c
@@ -4309,6 +4309,9 @@ int iscsit_close_connection(
iscsit_stop_nopin_response_timer(conn);
iscsit_stop_nopin_timer(conn);

+ if (conn->conn_transport->iscsit_wait_conn)
+ conn->conn_transport->iscsit_wait_conn(conn);
+
/*
* During Connection recovery drop unacknowledged out of order
* commands for this connection, and prepare the other commands
@@ -4394,9 +4397,6 @@ int iscsit_close_connection(
target_sess_cmd_list_set_waiting(sess->se_sess);
target_wait_for_sess_cmds(sess->se_sess);

- if (conn->conn_transport->iscsit_wait_conn)
- conn->conn_transport->iscsit_wait_conn(conn);
-
if (conn->conn_rx_hash.tfm)
crypto_free_hash(conn->conn_rx_hash.tfm);
if (conn->conn_tx_hash.tfm)