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From:   Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To:     linux-kernel@vger.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        stable@vger.kernel.org, Himanshu Madhani <hmadhani@marvell.com>,
        "Martin K. Petersen" <martin.petersen@oracle.com>,
        Sasha Levin <sashal@kernel.org>
Subject: [PATCH 4.19 083/125] scsi: qla2xxx: Initialized mailbox to prevent driver load failure
Date:   Mon, 11 Nov 2019 19:28:42 +0100
Message-Id: <20191111181451.235535193@linuxfoundation.org>
In-Reply-To: <20191111181438.945353076@linuxfoundation.org>
References: <20191111181438.945353076@linuxfoundation.org>
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From: Himanshu Madhani <hmadhani@marvell.com>

[ Upstream commit c2ff2a36eff60efb5e123c940115216d6bf65684 ]

This patch fixes issue with Gen7 adapter in a blade environment where one
of the ports will not be detected by driver. Firmware expects mailbox 11 to
be set or cleared by driver for newer ISP.

Following message is seen in the log file:

[   18.810892] qla2xxx [0000:d8:00.0]-1820:1: **** Failed=102 mb[0]=4005 mb[1]=37 mb[2]=20 mb[3]=8
[   18.819596]  cmd=2 ****

[mkp: typos]

Link: https://lore.kernel.org/r/20191022193643.7076-2-hmadhani@marvell.com
Signed-off-by: Himanshu Madhani <hmadhani@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/scsi/qla2xxx/qla_mbx.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/scsi/qla2xxx/qla_mbx.c b/drivers/scsi/qla2xxx/qla_mbx.c
index 84f57f075455e..128fcff24f1be 100644
--- a/drivers/scsi/qla2xxx/qla_mbx.c
+++ b/drivers/scsi/qla2xxx/qla_mbx.c
@@ -684,6 +684,7 @@ qla2x00_execute_fw(scsi_qla_host_t *vha, uint32_t risc_addr)
 		mcp->mb[2] = LSW(risc_addr);
 		mcp->mb[3] = 0;
 		mcp->mb[4] = 0;
+		mcp->mb[11] = 0;
 		ha->flags.using_lr_setting = 0;
 		if (IS_QLA25XX(ha) || IS_QLA81XX(ha) || IS_QLA83XX(ha) ||
 		    IS_QLA27XX(ha)) {
@@ -727,7 +728,7 @@ qla2x00_execute_fw(scsi_qla_host_t *vha, uint32_t risc_addr)
 		if (ha->flags.exchoffld_enabled)
 			mcp->mb[4] |= ENABLE_EXCHANGE_OFFLD;
 
-		mcp->out_mb |= MBX_4|MBX_3|MBX_2|MBX_1;
+		mcp->out_mb |= MBX_4 | MBX_3 | MBX_2 | MBX_1 | MBX_11;
 		mcp->in_mb |= MBX_3 | MBX_2 | MBX_1;
 	} else {
 		mcp->mb[1] = LSW(risc_addr);
-- 
2.20.1