[ -b "${rootfs}" ] || return 1
case "$board" in
zyxel,nbg6817)
- local dualflagmtd="$(find_mtd_part 0:DUAL_FLAG)"
+ local dualflagmtd="$(find_mtd_part 0:dual_flag)"
+ # XXX: drop upper case after kernel v5.4 is gone (qcom-smem)
+ [ -b $dualflagmtd ] || \
+ dualflagmtd="$(find_mtd_part 0:DUAL_FLAG)"
[ -b $dualflagmtd ] || return 1
case "$rootfs" in