Now time, I am confused by the usb_control_msg() function. The device can work right after I call usb_control_msg() with the right arguments but the fuction just return -EPIPE. I want to check what happed in usb core and ehci driver. The run-time dev_dbg infomation would be great help. So how can I get them? I'll appreciate any reply! Regards -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
