E9 板子wifi 驱动rt5370加载成功，移植wpa_supplicant后，出现错误

[root@EmbedSky run]# wpa_supplicant -B -ira0 -c /etc/wpa_supplicant.conf  -Dwext
unlink[ctrl_iface]: Not a directory
Could not unlink existing ctrl_iface socket '/var/run/wpa_supplicant/ra0'
Failed to initialize control interface '/var/run/wpa_supplicant'.
You may have another wpa_supplicant process already running or the file was
left by an unclean termination of wpa_supplicant in which case you will need
to manually remove this file before starting wpa_supplicant again.
请有过次经验的解答一下

编译内核Networking—>Networking options—>Unix domain sockets看看

已解决，命令写错了，wpa_supplicant  -Dwext -iwlan0 -c/etc/wpa_supplicant.conf  -dd&