scsi: qla2xxx: Further limit FLASH region write access from SysFS

Recent ISPs have larger and more complex flash-write semantics
(secure-access and signing). The BSG interfaces support these semantics for
all ISPs and is exclusively used by QLogic user-space tools. Limit
flash-write operations to ISPs <= 25xx.

Signed-off-by: Andrew Vasquez <andrewv@marvell.com>
Signed-off-by: Himanshu Madhani <hmadhani@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/qla2xxx/qla_attr.c

@@ -430,16 +430,18 @@ qla2x00_sysfs_write_optrom_ctl(struct file *filp, struct kobject *kobj,
 		 * 	0x000000 -> 0x07ffff -- Boot code.
 		 * 	0x080000 -> 0x0fffff -- Firmware.
 		 * 	0x120000 -> 0x12ffff -- VPD and HBA parameters.
+		 *
+		 * > ISP25xx type boards:
+		 *
+		 *      None -- should go through BSG.
 		 */
 		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)
-			|| IS_CNA_CAPABLE(ha) || IS_QLA2031(ha)
-			|| IS_QLA27XX(ha) || IS_QLA28XX(ha))
+		else if (IS_QLA24XX_TYPE(ha) || IS_QLA25XX(ha))
 			valid = 1;
 		if (!valid) {
 			ql_log(ql_log_warn, vha, 0x7065,