我是特意看了内核里支持Ralink的无线网卡才买的，结果回来插上去发现，板子可以识别：
usb 1-1: new full speed USB device using s3c2410-ohci and address 3
usb 1-1: New USB device found, idVendor=148f, idProduct=3070
usb 1-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
usb 1-1: Product: 802.11 n WLAN
usb 1-1: Manufacturer: Ralink
usb 1-1: SerialNumber: 1.0
usb 1-1: configuration #1 chosen from 1 choice
然后用ifconfig配置，却出现如下提示：
[root@FriendlyARM /]# ifconfig wlan0 up
rt2800usb 1-1:1.0: firmware: requesting rt2870.bin
phy0 -> rt2x00lib_request_firmware: Error - Failed to request Firmware.
ifconfig: SIOCSIFFLAGS: No such file or directory
百度谷歌未果，大大们有和我遇到过相同的问题的么？
