Patch "scsi: qla2xxx: Fix losing target when it reappears during delete" has been added to the 5.15-stable tree

[Sasha Levin <sashal@xxxxxxxxxx>]

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

    scsi: qla2xxx: Fix losing target when it reappears during delete

to the 5.15-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-fix-losing-target-when-it-reappears-dur.patch
and it can be found in the queue-5.15 subdirectory.

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



commit f716ebbcca6fd9461d2fea1b920aa18c48915ca1
Author: Arun Easi <aeasi@xxxxxxxxxxx>
Date:   Wed Jun 15 22:35:04 2022 -0700

    scsi: qla2xxx: Fix losing target when it reappears during delete
    
    [ Upstream commit 118b0c863c8f5629cc5271fc24d72d926e0715d9 ]
    
    FC target disappeared during port perturbation tests due to a race that
    tramples target state.  Fix the issue by adding state checks before
    proceeding.
    
    Link: https://lore.kernel.org/r/20220616053508.27186-8-njavali@xxxxxxxxxxx
    Fixes: 44c57f205876 ("scsi: qla2xxx: Changes to support FCP2 Target")
    Cc: stable@xxxxxxxxxxxxxxx
    Signed-off-by: Arun Easi <aeasi@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_attr.c b/drivers/scsi/qla2xxx/qla_attr.c
index bd4ebc1b5c1e..a302ed8b610f 100644
--- a/drivers/scsi/qla2xxx/qla_attr.c
+++ b/drivers/scsi/qla2xxx/qla_attr.c
@@ -2705,17 +2705,24 @@ qla2x00_dev_loss_tmo_callbk(struct fc_rport *rport)
 	if (!fcport)
 		return;
 
-	/* Now that the rport has been deleted, set the fcport state to
-	   FCS_DEVICE_DEAD */
-	qla2x00_set_fcport_state(fcport, FCS_DEVICE_DEAD);
+
+	/*
+	 * Now that the rport has been deleted, set the fcport state to
+	 * FCS_DEVICE_DEAD, if the fcport is still lost.
+	 */
+	if (fcport->scan_state != QLA_FCPORT_FOUND)
+		qla2x00_set_fcport_state(fcport, FCS_DEVICE_DEAD);
 
 	/*
 	 * Transport has effectively 'deleted' the rport, clear
 	 * all local references.
 	 */
 	spin_lock_irqsave(host->host_lock, flags);
-	fcport->rport = fcport->drport = NULL;
-	*((fc_port_t **)rport->dd_data) = NULL;
+	/* Confirm port has not reappeared before clearing pointers. */
+	if (rport->port_state != FC_PORTSTATE_ONLINE) {
+		fcport->rport = fcport->drport = NULL;
+		*((fc_port_t **)rport->dd_data) = NULL;
+	}
 	spin_unlock_irqrestore(host->host_lock, flags);
 
 	if (test_bit(ABORT_ISP_ACTIVE, &fcport->vha->dpc_flags))
@@ -2748,9 +2755,12 @@ qla2x00_terminate_rport_io(struct fc_rport *rport)
 	/*
 	 * At this point all fcport's software-states are cleared.  Perform any
 	 * final cleanup of firmware resources (PCBs and XCBs).
+	 *
+	 * Attempt to cleanup only lost devices.
 	 */
 	if (fcport->loop_id != FC_NO_LOOP_ID) {
-		if (IS_FWI2_CAPABLE(fcport->vha->hw)) {
+		if (IS_FWI2_CAPABLE(fcport->vha->hw) &&
+		    fcport->scan_state != QLA_FCPORT_FOUND) {
 			if (fcport->loop_id != FC_NO_LOOP_ID)
 				fcport->logout_on_delete = 1;
 
@@ -2760,7 +2770,7 @@ qla2x00_terminate_rport_io(struct fc_rport *rport)
 				       __LINE__);
 				qlt_schedule_sess_for_deletion(fcport);
 			}
-		} else {
+		} else if (!IS_FWI2_CAPABLE(fcport->vha->hw)) {
 			qla2x00_port_logout(fcport->vha, fcport);
 		}
 	}