From: Quinn Tran <qutran@marvell.com>
Date: Thu, 10 Mar 2022 01:25:53 -0800
Subject: scsi: qla2xxx: Fix disk failure to rediscover
Git-commit: 6a45c8e137d4e2c72eecf1ac7cf64f2fdfcead99
Patch-mainline: v5.18-rc1
References: git-fixes

User experienced some of the LUN failed to get rediscovered after long
cable pull test. The issue is triggered by a race condition between driver
setting session online state vs starting the LUN scan process at the same
time. Current code set the online state after notifying the session is
available. In this case, trigger to start the LUN scan process happened
before driver could set the session in online state.  LUN scan ends up with
failure due to the session online check was failing.

Set the online state before reporting of the availability of the session.

Link: https://lore.kernel.org/r/20220310092604.22950-3-njavali@marvell.com
Fixes: aecf043443d3 ("scsi: qla2xxx: Fix Remote port registration")
Cc: stable@vger.kernel.org
Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Signed-off-by: Quinn Tran <qutran@marvell.com>
Signed-off-by: Nilesh Javali <njavali@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Acked-by: Lee Duncan <lduncan@suse.com>
---
 drivers/scsi/qla2xxx/qla_init.c | 5 +++--
 drivers/scsi/qla2xxx/qla_nvme.c | 5 +++++
 2 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/drivers/scsi/qla2xxx/qla_init.c b/drivers/scsi/qla2xxx/qla_init.c
index 2f3a3cd31bd6..e468b05f90c0 100644
--- a/drivers/scsi/qla2xxx/qla_init.c
+++ b/drivers/scsi/qla2xxx/qla_init.c
@@ -5758,6 +5758,8 @@ qla2x00_reg_remote_port(scsi_qla_host_t *vha, fc_port_t *fcport)
 	if (atomic_read(&fcport->state) == FCS_ONLINE)
 		return;
 
+	qla2x00_set_fcport_state(fcport, FCS_ONLINE);
+
 	rport_ids.node_name = wwn_to_u64(fcport->node_name);
 	rport_ids.port_name = wwn_to_u64(fcport->port_name);
 	rport_ids.port_id = fcport->d_id.b.domain << 16 |
@@ -5858,6 +5860,7 @@ qla2x00_update_fcport(scsi_qla_host_t *vha, fc_port_t *fcport)
 		qla2x00_reg_remote_port(vha, fcport);
 		break;
 	case MODE_TARGET:
+		qla2x00_set_fcport_state(fcport, FCS_ONLINE);
 		if (!vha->vha_tgt.qla_tgt->tgt_stop &&
 			!vha->vha_tgt.qla_tgt->tgt_stopped)
 			qlt_fc_port_added(vha, fcport);
@@ -5875,8 +5878,6 @@ qla2x00_update_fcport(scsi_qla_host_t *vha, fc_port_t *fcport)
 	if (NVME_TARGET(vha->hw, fcport))
 		qla_nvme_register_remote(vha, fcport);
 
-	qla2x00_set_fcport_state(fcport, FCS_ONLINE);
-
 	if (IS_IIDMA_CAPABLE(vha->hw) && vha->hw->flags.gpsc_supported) {
 		if (fcport->id_changed) {
 			fcport->id_changed = 0;
diff --git a/drivers/scsi/qla2xxx/qla_nvme.c b/drivers/scsi/qla2xxx/qla_nvme.c
index 718c761ff5f8..5723082d94d6 100644
--- a/drivers/scsi/qla2xxx/qla_nvme.c
+++ b/drivers/scsi/qla2xxx/qla_nvme.c
@@ -37,6 +37,11 @@ int qla_nvme_register_remote(struct scsi_qla_host *vha, struct fc_port *fcport)
 		(fcport->nvme_flag & NVME_FLAG_REGISTERED))
 		return 0;
 
+	if (atomic_read(&fcport->state) == FCS_ONLINE)
+		return 0;
+
+	qla2x00_set_fcport_state(fcport, FCS_ONLINE);
+
 	fcport->nvme_flag &= ~NVME_FLAG_RESETTING;
 
 	memset(&req, 0, sizeof(struct nvme_fc_port_info));