linux-kernel - [PATCH v2 3/3] scsi: qla2xxx: Remove incorrect trap

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Message-ID: <20241009111654.4697-4-a.kovaleva@yadro.com>
Date: Wed, 9 Oct 2024 14:16:54 +0300
From: Anastasia Kovaleva <a.kovaleva@...ro.com>
To: <target-devel@...r.kernel.org>
CC: <njavali@...vell.com>, <GR-QLogic-Storage-Upstream@...vell.com>,
	<James.Bottomley@...senPartnership.com>, <martin.petersen@...cle.com>,
	<bvanassche@....org>, <quinn.tran@...ium.com>, <himanshu.madhani@...ium.com>,
	<linux-scsi@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<linux@...ro.com>, <hare@...e.de>, <stable@...r.kernel.org>
Subject: [PATCH v2 3/3] scsi: qla2xxx: Remove incorrect trap

This BUG_ON() is triggered when there is no fc_port with a certain
loop ID in the scsi host vp_fcports list, but there is one in
lport_loopid_map. As these two data structures do not change
simultaneously and atomically, such a trap is invalid.

Cc: stable@...r.kernel.org
Fixes: 726b85487067 ("qla2xxx: Add framework for async fabric discovery")
Signed-off-by: Anastasia Kovaleva <a.kovaleva@...ro.com>
Reviewed-by: Dmitry Bogdanov <d.bogdanov@...ro.com>
Reviewed-by: Hannes Reinecke <hare@...e.de>
---
 drivers/scsi/qla2xxx/qla_target.c | 10 +---------
 1 file changed, 1 insertion(+), 9 deletions(-)

diff --git a/drivers/scsi/qla2xxx/qla_target.c b/drivers/scsi/qla2xxx/qla_target.c
index bc6b014eb422..492fc1627354 100644
--- a/drivers/scsi/qla2xxx/qla_target.c
+++ b/drivers/scsi/qla2xxx/qla_target.c
@@ -5190,15 +5190,7 @@ static int qlt_24xx_handle_els(struct scsi_qla_host *vha,
 		ql_dbg(ql_dbg_disc, vha, 0x20fc,
 		    "%s: logo %llx res %d sess %p ",
 		    __func__, wwn, res, sess);
-		if (res == 0) {
-			/*
-			 * cmd went upper layer, look for qlt_xmit_tm_rsp()
-			 * for LOGO_ACK & sess delete
-			 */
-			BUG_ON(!sess);
-			res = 0;
-		} else {
-			/* cmd did not go to upper layer. */
+		if (res) {
 			if (sess) {
 				qlt_schedule_sess_for_deletion(sess);
 				res = 0;
-- 
2.40.1