scsi: qla2xxx: Fix partial flash write of MBI

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@vger.kernel.org # 5.2
Link: https://lore.kernel.org/r/20191022193643.7076-3-hmadhani@marvell.com
Signed-off-by: Quinn Tran <qutran@marvell.com>
Signed-off-by: Girish Basrur <gbasrur@marvell.com>
Signed-off-by: Himanshu Madhani <hmadhani@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

diff --git a/drivers/scsi/qla2xxx/qla_attr.c b/drivers/scsi/qla2xxx/qla_attr.c
index 8b30153..8705ca6 100644 (file)
--- a/drivers/scsi/qla2xxx/qla_attr.c
+++ b/drivers/scsi/qla2xxx/qla_attr.c
@@ -440,9 +440,6 @@ qla2x00_sysfs_write_optrom_ctl(struct file *filp, struct kobject *kobj,
                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) {
@@ -489,8 +486,10 @@ qla2x00_sysfs_write_optrom_ctl(struct file *filp, struct kobject *kobj,
                    "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;