> Well, since 0 is not an illegal value as specified in the USB spec, I
> think we should do this check in the usb_submit_urb() call, not force it
> to be duplicated in all host drivers.  

In fact there are a lot of checks in the hcd framework
already -- hcd.c has hcd_submit_urb() checking quite
a lot more than that.  In 2.5 I'd expect that to be the
place such common code lands.

- Dave



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