cur_boot_part=$(/usr/sbin/fw_printenv -n boot_part)
if [ -z "${cur_boot_part}" ] ; then
- mtd_ubi0=$(cat /sys/devices/virtual/ubi/ubi0/mtd_num)
+ mtd_ubi0=$(cat /sys/class/ubi/ubi0/mtd_num)
case $(grep -E ^mtd${mtd_ubi0}: /proc/mtd | cut -d '"' -f 2) in
kernel1|rootfs1)
cur_boot_part=1