linux-kernel - [PATCH 5.8 148/255] scsi: qla2xxx: Flush all sessions on zone disable

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Message-Id: <20200901151007.780748111@linuxfoundation.org>
Date:   Tue,  1 Sep 2020 17:10:04 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Himanshu Madhani <himanshu.madhani@...cle.com>,
        Quinn Tran <qutran@...vell.com>,
        Himanshu Madhani <hmadhani@...vell.com>,
        Nilesh Javali <njavali@...vell.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.8 148/255] scsi: qla2xxx: Flush all sessions on zone disable

From: Quinn Tran <qutran@...vell.com>

[ Upstream commit 10ae30ba664822f62de169a61628e31c999c7cc8 ]

On Zone Disable, certain switches would ignore all commands. This causes
timeout for both switch scan command and abort of that command. On
detection of this condition, all sessions will be shutdown.

Link: https://lore.kernel.org/r/20200806111014.28434-2-njavali@marvell.com
Reviewed-by: Himanshu Madhani <himanshu.madhani@...cle.com>
Signed-off-by: Quinn Tran <qutran@...vell.com>
Signed-off-by: Himanshu Madhani <hmadhani@...vell.com>
Signed-off-by: Nilesh Javali <njavali@...vell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@...cle.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/scsi/qla2xxx/qla_gs.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/drivers/scsi/qla2xxx/qla_gs.c b/drivers/scsi/qla2xxx/qla_gs.c
index df670fba2ab8a..c6b6a3250312e 100644
--- a/drivers/scsi/qla2xxx/qla_gs.c
+++ b/drivers/scsi/qla2xxx/qla_gs.c
@@ -3736,6 +3736,18 @@ static void qla2x00_async_gpnft_gnnft_sp_done(srb_t *sp, int res)
 		unsigned long flags;
 		const char *name = sp->name;
 
+		if (res == QLA_OS_TIMER_EXPIRED) {
+			/* switch is ignoring all commands.
+			 * This might be a zone disable behavior.
+			 * This means we hit 64s timeout.
+			 * 22s GPNFT + 44s Abort = 64s
+			 */
+			ql_dbg(ql_dbg_disc, vha, 0xffff,
+			       "%s: Switch Zone check please .\n",
+			       name);
+			qla2x00_mark_all_devices_lost(vha);
+		}
+
 		/*
 		 * We are in an Interrupt context, queue up this
 		 * sp for GNNFT_DONE work. This will allow all
-- 
2.25.1