FAILED: patch "[PATCH] scsi: qla2xxx: Fix hang due to session stuck" failed to apply to 4.14-stable tree

[<gregkh@linuxfoundation.org>]

The patch below does not apply to the 4.14-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable@vger.kernel.org>.

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From c02aada06d19a215c8291bd968a99a270e96f734 Mon Sep 17 00:00:00 2001
From: Quinn Tran <qutran@marvell.com>
Date: Thu, 10 Mar 2022 01:25:58 -0800
Subject: [PATCH] scsi: qla2xxx: Fix hang due to session stuck

User experienced device lost. The log shows Get port data base command was
queued up, failed, and requeued again. Every time it is requeued, it set
the FCF_ASYNC_ACTIVE. This prevents any recovery code from occurring
because driver thinks a recovery is in progress for this session. In
essence, this session is hung.  The reason it gets into this place is the
session deletion got in front of this call due to link perturbation.

Break the requeue cycle and exit.  The session deletion code will trigger a
session relogin.

Link: https://lore.kernel.org/r/20220310092604.22950-8-njavali@marvell.com
Fixes: 726b85487067 ("qla2xxx: Add framework for async fabric discovery")
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>

diff --git a/drivers/scsi/qla2xxx/qla_def.h b/drivers/scsi/qla2xxx/qla_def.h
index bab2f665b6c2..8aa1cccebab1 100644
--- a/drivers/scsi/qla2xxx/qla_def.h
+++ b/drivers/scsi/qla2xxx/qla_def.h
@@ -5438,4 +5438,8 @@ struct ql_vnd_tgt_stats_resp {
 #include "qla_gbl.h"
 #include "qla_dbg.h"
 #include "qla_inline.h"
+
+#define IS_SESSION_DELETED(_fcport) (_fcport->disc_state == DSC_DELETE_PEND || \
+				      _fcport->disc_state == DSC_DELETED)
+
 #endif
diff --git a/drivers/scsi/qla2xxx/qla_init.c b/drivers/scsi/qla2xxx/qla_init.c
index e468b05f90c0..5dfaa4d39cec 100644
--- a/drivers/scsi/qla2xxx/qla_init.c
+++ b/drivers/scsi/qla2xxx/qla_init.c
@@ -575,6 +575,14 @@ qla2x00_async_adisc(struct scsi_qla_host *vha, fc_port_t *fcport,
 	struct srb_iocb *lio;
 	int rval = QLA_FUNCTION_FAILED;
 
+	if (IS_SESSION_DELETED(fcport)) {
+		ql_log(ql_log_warn, vha, 0xffff,
+		       "%s: %8phC is being delete - not sending command.\n",
+		       __func__, fcport->port_name);
+		fcport->flags &= ~FCF_ASYNC_ACTIVE;
+		return rval;
+	}
+
 	if (!vha->flags.online || (fcport->flags & FCF_ASYNC_SENT))
 		return rval;
 
@@ -1338,8 +1346,15 @@ int qla24xx_async_gpdb(struct scsi_qla_host *vha, fc_port_t *fcport, u8 opt)
 	struct port_database_24xx *pd;
 	struct qla_hw_data *ha = vha->hw;
 
-	if (!vha->flags.online || (fcport->flags & FCF_ASYNC_SENT) ||
-	    fcport->loop_id == FC_NO_LOOP_ID) {
+	if (IS_SESSION_DELETED(fcport)) {
+		ql_log(ql_log_warn, vha, 0xffff,
+		       "%s: %8phC is being delete - not sending command.\n",
+		       __func__, fcport->port_name);
+		fcport->flags &= ~FCF_ASYNC_ACTIVE;
+		return rval;
+	}
+
+	if (!vha->flags.online || fcport->flags & FCF_ASYNC_SENT) {
 		ql_log(ql_log_warn, vha, 0xffff,
 		    "%s: %8phC online %d flags %x - not sending command.\n",
 		    __func__, fcport->port_name, vha->flags.online, fcport->flags);