[PATCH 5.3 155/180] scsi: qla2xxx: Fix stale session

[Greg Kroah-Hartman]

From: Quinn Tran <qutran@xxxxxxxxxxx>

[ Upstream commit 2037ce49d30a0d07348df406ef78f6664f4bc899 ]

On fast cable pull, where driver is unable to detect device has disappeared
and came back based on switch info, qla2xxx would not re-login while remote
port has already invalidated the session.  This causes IO timeout.  This
patch would relogin to remote device for RSCN affected port.

Signed-off-by: Quinn Tran <qutran@xxxxxxxxxxx>
Signed-off-by: Himanshu Madhani <hmadhani@xxxxxxxxxxx>
Reviewed-by: Ewan D. Milne <emilne@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20190830222402.23688-6-hmadhani@xxxxxxxxxxx
Signed-off-by: Martin K. Petersen <martin.petersen@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 drivers/scsi/qla2xxx/qla_gs.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/scsi/qla2xxx/qla_gs.c b/drivers/scsi/qla2xxx/qla_gs.c
index ebf223cfebbc5..dec521d726d91 100644
--- a/drivers/scsi/qla2xxx/qla_gs.c
+++ b/drivers/scsi/qla2xxx/qla_gs.c
@@ -3674,7 +3674,6 @@ void qla24xx_async_gnnft_done(scsi_qla_host_t *vha, srb_t *sp)
 		list_for_each_entry(fcport, &vha->vp_fcports, list) {
 			if (memcmp(rp->port_name, fcport->port_name, WWN_SIZE))
 				continue;
-			fcport->scan_needed = 0;
 			fcport->scan_state = QLA_FCPORT_FOUND;
 			found = true;
 			/*
@@ -3683,10 +3682,12 @@ void qla24xx_async_gnnft_done(scsi_qla_host_t *vha, srb_t *sp)
 			if ((fcport->flags & FCF_FABRIC_DEVICE) == 0) {
 				qla2x00_clear_loop_id(fcport);
 				fcport->flags |= FCF_FABRIC_DEVICE;
-			} else if (fcport->d_id.b24 != rp->id.b24) {
+			} else if (fcport->d_id.b24 != rp->id.b24 ||
+				fcport->scan_needed) {
 				qlt_schedule_sess_for_deletion(fcport);
 			}
 			fcport->d_id.b24 = rp->id.b24;
+			fcport->scan_needed = 0;
 			break;
 		}
 
-- 
2.20.1