linux-kernel - [PATCH 4.15 129/146] scsi: qla2xxx: Retry switch command on time out

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Message-Id: <20180313152330.147327688@linuxfoundation.org>
Date:   Tue, 13 Mar 2018 16:24:56 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Quinn Tran <quinn.tran@...ium.com>,
        Himanshu Madhani <himanshu.madhani@...ium.com>,
        Hannes Reinecke <hare@...e.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>
Subject: [PATCH 4.15 129/146] scsi: qla2xxx: Retry switch command on time out

4.15-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Quinn Tran <quinn.tran@...ium.com>

commit 25ad76b703d9ad536f3411b15b1070aeb059ab55 upstream.

Retry GID_PN & GPN_ID switch commands for time out case.

Fixes: 726b85487067d ("qla2xxx: Add framework for async fabric discovery")
Cc: <stable@...r.kernel.org> # 4.10+
Signed-off-by: Quinn Tran <quinn.tran@...ium.com>
Signed-off-by: Himanshu Madhani <himanshu.madhani@...ium.com>
Reviewed-by: Hannes Reinecke <hare@...e.com>
Signed-off-by: Martin K. Petersen <martin.petersen@...cle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/scsi/qla2xxx/qla_gs.c |   34 ++++++++++++++++++++++++++--------
 1 file changed, 26 insertions(+), 8 deletions(-)

--- a/drivers/scsi/qla2xxx/qla_gs.c
+++ b/drivers/scsi/qla2xxx/qla_gs.c
@@ -175,6 +175,9 @@ qla2x00_chk_ms_status(scsi_qla_host_t *v
 				set_bit(LOCAL_LOOP_UPDATE, &vha->dpc_flags);
 			}
 			break;
+		case CS_TIMEOUT:
+			rval = QLA_FUNCTION_TIMEOUT;
+			/* drop through */
 		default:
 			ql_dbg(ql_dbg_disc, vha, 0x2033,
 			    "%s failed, completion status (%x) on port_id: "
@@ -2889,9 +2892,22 @@ static void qla2x00_async_gidpn_sp_done(
 	ea.rc = res;
 	ea.event = FCME_GIDPN_DONE;
 
-	ql_dbg(ql_dbg_disc, vha, 0x204f,
-	    "Async done-%s res %x, WWPN %8phC ID %3phC \n",
-	    sp->name, res, fcport->port_name, id);
+	if (res == QLA_FUNCTION_TIMEOUT) {
+		ql_dbg(ql_dbg_disc, sp->vha, 0xffff,
+		    "Async done-%s WWPN %8phC timed out.\n",
+		    sp->name, fcport->port_name);
+		qla24xx_post_gidpn_work(sp->vha, fcport);
+		sp->free(sp);
+		return;
+	} else if (res) {
+		ql_dbg(ql_dbg_disc, sp->vha, 0xffff,
+		    "Async done-%s fail res %x, WWPN %8phC\n",
+		    sp->name, res, fcport->port_name);
+	} else {
+		ql_dbg(ql_dbg_disc, vha, 0x204f,
+		    "Async done-%s good WWPN %8phC ID %3phC\n",
+		    sp->name, fcport->port_name, id);
+	}
 
 	qla2x00_fcport_event_handler(vha, &ea);
 
@@ -3217,11 +3233,6 @@ static void qla2x00_async_gpnid_sp_done(
 		    sp->name, ct_req->req.port_id.port_id,
 		    ct_rsp->rsp.gpn_id.port_name);
 
-	if (res) {
-		sp->free(sp);
-		return;
-	}
-
 	memset(&ea, 0, sizeof(ea));
 	memcpy(ea.port_name, ct_rsp->rsp.gpn_id.port_name, WWN_SIZE);
 	ea.sp = sp;
@@ -3231,6 +3242,13 @@ static void qla2x00_async_gpnid_sp_done(
 	ea.rc = res;
 	ea.event = FCME_GPNID_DONE;
 
+	if (res) {
+		if (res == QLA_FUNCTION_TIMEOUT)
+			qla24xx_post_gpnid_work(sp->vha, &ea.id);
+		sp->free(sp);
+		return;
+	}
+
 	qla2x00_fcport_event_handler(vha, &ea);
 
 	e = qla2x00_alloc_work(vha, QLA_EVT_GPNID_DONE);