我使用的是linux-2.4.21内核，问题如下： usb: raced timeout, pipe 0x80000180 status 0 time left 0 Entered test_submit_urb usb: raced timeout, pipe 0x80000180 status 0 time left 0 Entered test_submit_urb usb: raced timeout, pipe 0x80000180 status 0 time left 0 Entered test_submit_urb usb: raced timeout, pipe 0x80000180 status 0 time left 0 Entered test_submit_urb usb: raced timeout, pipe 0x80000180 status 0 time left 0 usb.c: USB device descriptor short read (expected 8, got 0) 请问谁碰到过类似的问题，我已经努力了三四天了，解决不了