play with usb

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1)

struct usbdevfs_bulktransfer {
        unsigned int ep;
        unsigned int len;
        unsigned int timeout; /* in milliseconds */
        void __user *data;
};
till now, I can‘t forget the interviewer in 2014 in tecent, who let me write assembly code fast.

play with usb

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原文地址：http://www.cnblogs.com/honpey/p/6259773.html