Patch "scsi: qla2xxx: Relogin during fabric disturbance" has been added to the 5.10-stable tree

[Sasha Levin <sashal@xxxxxxxxxx>]

This is a note to let you know that I've just added the patch titled

    scsi: qla2xxx: Relogin during fabric disturbance

to the 5.10-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     scsi-qla2xxx-relogin-during-fabric-disturbance.patch
and it can be found in the queue-5.10 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit bf5045aba325e8e50fb5dd72d343598008d7ae28
Author: Quinn Tran <qutran@xxxxxxxxxxx>
Date:   Tue Oct 26 04:54:00 2021 -0700

    scsi: qla2xxx: Relogin during fabric disturbance
    
    [ Upstream commit bb2ca6b3f09ac20e8357d257d0557ab5ddf6adcd ]
    
    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 I/O timeout and delay of relogin. Hence initiate relogin in the
    event of fabric disturbance.
    
    Link: https://lore.kernel.org/r/20211026115412.27691-2-njavali@xxxxxxxxxxx
    Fixes: 1560bafdff9e ("scsi: qla2xxx: Use complete switch scan for RSCN events")
    Reviewed-by: Himanshu Madhani <himanshu.madhani@xxxxxxxxxx>
    Signed-off-by: Quinn Tran <qutran@xxxxxxxxxxx>
    Signed-off-by: Nilesh Javali <njavali@xxxxxxxxxxx>
    Signed-off-by: Martin K. Petersen <martin.petersen@xxxxxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/drivers/scsi/qla2xxx/qla_init.c b/drivers/scsi/qla2xxx/qla_init.c
index e893b42e51a35..5bbdaefb44efc 100644
--- a/drivers/scsi/qla2xxx/qla_init.c
+++ b/drivers/scsi/qla2xxx/qla_init.c
@@ -1708,16 +1708,52 @@ 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;
-		}
-		fcport->scan_needed = 1;
-		fcport->rscn_gen++;
+	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++;
+			}
+		}
+		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);