In network disable and NetworkManager enable, the network failed to start the NIC.

[shangli-HW]

In the case of network disable and NetworkManager enable, the network is started for the first time, and the network fails to read ifcfg-ethx file.

ifup: "[ -n "${DEVICE}" ] && is_nm_handling ${DEVICE} && exit 0" will exit 0.

if [ "$_use_nm" = "true" -a -n "$UUID" -a "$REALDEVICE" != "lo" ]; then
if [ "foo$2" = "fooboot" ] && [ "${TYPE}" = "Wireless" ]; then
exit 0
fi
[ -n "${DEVICE}" ] && is_nm_handling ${DEVICE} && exit 0
nmcli con up uuid "$UUID"
exit $?
fi