On Oct 21, 2021, at 2:31 AM, Nilesh Javali [off-list ref] wrote:

From: Quinn Tran <redacted>

For RSCN of type "Area, Domain, or Fabric", which indicate
a portion or entire fabric was disturbed. Current driver
does not set the scan_need flag to indicate a session was
affected by the disturbance. This in turn, can lead to
IO timeout and delay of relogin. Hence initiate relogin
in the event of fabric disturbance.

Fixes: 1560bafdff9e ("scsi: qla2xxx: Use complete switch scan for RSCN events")
Signed-off-by: Quinn Tran <redacted>
Signed-off-by: Nilesh Javali <njavali@marvell.com>
---
drivers/scsi/qla2xxx/qla_init.c | 54 +++++++++++++++++++++++++++------
1 file changed, 45 insertions(+), 9 deletions(-)

diff --git a/drivers/scsi/qla2xxx/qla_init.c b/drivers/scsi/qla2xxx/qla_init.c
index a9a4243cb15a..339aa3b2737a 100644
--- a/drivers/scsi/qla2xxx/qla_init.c
+++ b/drivers/scsi/qla2xxx/qla_init.c

@@ -1786,16 +1786,52 @@ void qla2x00_handle_rscn(scsi_qla_host_t *vha, struct event_arg *ea)

	fc_port_t *fcport;
	unsigned long flags;

-	fcport = qla2x00_find_fcport_by_nportid(vha, &ea->id, 1);
-	if (fcport) {
-		if (fcport->flags & FCF_FCP2_DEVICE) {
-			ql_dbg(ql_dbg_disc, vha, 0x2115,
-			       "Delaying session delete for FCP2 portid=%06x %8phC ",
-			       fcport->d_id.b24, fcport->port_name);
-			return;
+	switch (ea->id.b.rsvd_1) {
+	case RSCN_PORT_ADDR:
+		fcport = qla2x00_find_fcport_by_nportid(vha, &ea->id, 1);
+		if (fcport) {
+			if (fcport->flags & FCF_FCP2_DEVICE) {
+				ql_dbg(ql_dbg_disc, vha, 0x2115,
+				       "Delaying session delete for FCP2 portid=%06x %8phC ",
+					fcport->d_id.b24, fcport->port_name);
+				return;
+			}
+			fcport->scan_needed = 1;
+			fcport->rscn_gen++;
+		}
+		break;
+	case RSCN_AREA_ADDR:
+		list_for_each_entry(fcport, &vha->vp_fcports, list) {
+			if (fcport->flags & FCF_FCP2_DEVICE)
+				continue;
+
+			if ((ea->id.b24 & 0xffff00) == (fcport->d_id.b24 & 0xffff00)) {
+				fcport->scan_needed = 1;
+				fcport->rscn_gen++;
+			}
		}
-		fcport->scan_needed = 1;
-		fcport->rscn_gen++;
+		break;
+	case RSCN_DOM_ADDR:
+		list_for_each_entry(fcport, &vha->vp_fcports, list) {
+			if (fcport->flags & FCF_FCP2_DEVICE)
+				continue;
+
+			if ((ea->id.b24 & 0xff0000) == (fcport->d_id.b24 & 0xff0000)) {
+				fcport->scan_needed = 1;
+				fcport->rscn_gen++;
+			}
+		}
+		break;
+	case RSCN_FAB_ADDR:
+	default:
+		list_for_each_entry(fcport, &vha->vp_fcports, list) {
+			if (fcport->flags & FCF_FCP2_DEVICE)
+				continue;
+
+			fcport->scan_needed = 1;
+			fcport->rscn_gen++;
+		}
+		break;
	}

	spin_lock_irqsave(&vha->work_lock, flags);
-- 
2.19.0.rc0