On Wed, 1 Mar 2006, David Brownell wrote: > > > > The "-EPROTO" is common after unplug, but that -EILSEQ suggests you > > > have a real issue in the lh7a40x_udc driver ... > > > > Not necessarily. -EILSEQ is a normal code used by uhci-hcd when a CRC or > > timeout error occurs on an IN transaction. > > True, but it's usually an either/or: either you always get the > same error after unplug, OR that UDC driver has a bug.
If you're referring to whether you get -EILSEQ vs. -EPROTO, it depends on the direction of the transfer. For some reason, uhci-hcd reports CRC/timeout errors as -EILSEQ for IN transfers and -EPROTO for OUT transfers. I guess originally someone thought that IN would be associated with CRC errors (which makes sense) and OUT with timeout errors (which doesn't). It's especially strange considering that bitstuff errors are also reported as -EPROTO. Don't ask me -- all that code was written long before I became the maintainer. So if a test in one direction failed when the gadget was unplugged and then another test in the other direction immediately started up and failed, you'd expect to see the two different error codes. Alan Stern ------------------------------------------------------- This SF.Net email is sponsored by xPML, a groundbreaking scripting language that extends applications into web and mobile media. Attend the live webcast and join the prime developer group breaking into this new coding territory! http://sel.as-us.falkag.net/sel?cmd=lnk&kid=110944&bid=241720&dat=121642 _______________________________________________ linux-usb-devel@lists.sourceforge.net To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
