Messages in this thread | | | Date | Tue, 31 Aug 2010 09:52:26 -0400 (EDT) | From | Alan Stern <> | Subject | Re: [PATCH] USB: output an error message when the pipe type doesn't match the endpoint type |
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On Tue, 31 Aug 2010, Clemens Ladisch wrote:
> Simon Arlott wrote: > > Commit f661c6f8c67bd55e93348f160d590ff9edf08904 adds a check of the pipe type if > > CONFIG_USB_DEBUG is enabled, > > I didn't see that commit last year, but wouldn't it break devices like > the ESI MIDI Mate whose descriptors want to have low-speed bulk transfers > and where the driver has to submit interrupt transfers instead to get it > to work at all?
When the kernel sees those invalid low-speed bulk endpoint descriptors, it changes its internal copy of the descriptor to interrupt. Hence when the driver submits interrupt URBs, they work correctly.
Alan Stern
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