linux-kernel - [PATCH 5.3 113/163] scsi: qla2xxx: Fix partial flash write of MBI

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Date:   Mon,  4 Nov 2019 22:45:03 +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 <qutran@...vell.com>,
        Girish Basrur <gbasrur@...vell.com>,
        Himanshu Madhani <hmadhani@...vell.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>
Subject: [PATCH 5.3 113/163] scsi: qla2xxx: Fix partial flash write of MBI

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

commit 8d8b83f5be2a3bdac3695a94e6cb5e50bd114869 upstream.

For new adapters with multiple flash regions to write to, current code
allows FW & Boot regions to be written, while other regions are blocked via
sysfs. The fix is to block all flash read/write through sysfs interface.

Fixes: e81d1bcbde06 ("scsi: qla2xxx: Further limit FLASH region write access from SysFS")
Cc: stable@...r.kernel.org # 5.2
Link: https://lore.kernel.org/r/20191022193643.7076-3-hmadhani@marvell.com
Signed-off-by: Quinn Tran <qutran@...vell.com>
Signed-off-by: Girish Basrur <gbasrur@...vell.com>
Signed-off-by: Himanshu Madhani <hmadhani@...vell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@...cle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/scsi/qla2xxx/qla_attr.c |    7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

--- a/drivers/scsi/qla2xxx/qla_attr.c
+++ b/drivers/scsi/qla2xxx/qla_attr.c
@@ -441,9 +441,6 @@ qla2x00_sysfs_write_optrom_ctl(struct fi
 		valid = 0;
 		if (ha->optrom_size == OPTROM_SIZE_2300 && start == 0)
 			valid = 1;
-		else if (start == (ha->flt_region_boot * 4) ||
-		    start == (ha->flt_region_fw * 4))
-			valid = 1;
 		else if (IS_QLA24XX_TYPE(ha) || IS_QLA25XX(ha))
 			valid = 1;
 		if (!valid) {
@@ -491,8 +488,10 @@ qla2x00_sysfs_write_optrom_ctl(struct fi
 		    "Writing flash region -- 0x%x/0x%x.\n",
 		    ha->optrom_region_start, ha->optrom_region_size);

-		ha->isp_ops->write_optrom(vha, ha->optrom_buffer,
+		rval = ha->isp_ops->write_optrom(vha, ha->optrom_buffer,
 		    ha->optrom_region_start, ha->optrom_region_size);
+		if (rval)
+			rval = -EIO;
 		break;
 	default:
 		rval = -EINVAL;