[PATCH 5.4 029/191] scsi: qla2xxx: Send Notify ACK after N2N PLOGI

From: Greg Kroah-Hartman
Date: Tue Jan 07 2020 - 16:28:05 EST

From: Roman Bolshakov <r.bolshakov@xxxxxxxxx>

[ Upstream commit 5e6b01d84b9d20bcd77fc7c4733a2a4149bf220a ]

qlt_handle_login schedules session for deletion even if a login is in
progress. That causes login bouncing, i.e. a few logins are made before it
settles down.

Complete the first login by sending Notify Acknowledge IOCB via
qlt_plogi_ack_unref if the session is pending login completion.

Fixes: 9cd883f07a54 ("scsi: qla2xxx: Fix session cleanup for N2N")
Cc: Krishna Kant <krishna.kant@xxxxxxxxxxxxxxx>
Cc: Alexei Potashnik <alexei@xxxxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20191125165702.1013-11-r.bolshakov@xxxxxxxxx
Acked-by: Quinn Tran <qutran@xxxxxxxxxxx>
Acked-by: Himanshu Madhani <hmadhani@xxxxxxxxxxx>
Reviewed-by: Hannes Reinecke <hare@xxxxxxx>
Tested-by: Hannes Reinecke <hare@xxxxxxx>
Signed-off-by: Roman Bolshakov <r.bolshakov@xxxxxxxxx>
Signed-off-by: Martin K. Petersen <martin.petersen@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
drivers/scsi/qla2xxx/qla_target.c | 1 +
1 file changed, 1 insertion(+)

diff --git a/drivers/scsi/qla2xxx/qla_target.c b/drivers/scsi/qla2xxx/qla_target.c
index 18522ac79d9e..74a378a91b71 100644
--- a/drivers/scsi/qla2xxx/qla_target.c
+++ b/drivers/scsi/qla2xxx/qla_target.c
@@ -4803,6 +4803,7 @@ static int qlt_handle_login(struct scsi_qla_host *vha,

switch (sess->disc_state) {
qlt_plogi_ack_unref(vha, pla);