Messages in this thread | | | Date | Tue, 12 Jan 2010 06:45:53 -0800 | From | Greg KH <> | Subject | Re: A QUESTION ABOUT USB DRIVER |
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On Mon, Jan 11, 2010 at 01:14:31PM +0800, Steven Xu wrote: > output: usb 1-1: device descriptor read/64, error -71 > > > in drivers/usb/core/hub.c line 2250 > when a udisk inserted run to here > for (j = 0; j < 3; ++j) { > buf->bMaxPacketSize0 = 0; > > r = usb_control_msg(udev, usb_rcvaddr0pipe(), > USB_REQ_GET_DESCRIPTOR, USB_DIR_IN, > USB_DT_DEVICE << 8, 0, > buf, GET_DESCRIPTOR_BUFSIZE, > (i ? USB_CTRL_GET_TIMEOUT : 1000)); > return r=-74, > > WHAT IS THE POSSIBEL REASON FOR THIS?
It is needed, why, are you having problems with it?
thanks,
greg k-h
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