lkml.org 
[lkml]   [2010]   [Aug]   [31]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH] USB: output an error message when the pipe type doesn't match the endpoint type
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



\
 
 \ /
  Last update: 2010-08-31 15:55    [W:0.111 / U:0.352 seconds]
©2003-2014 Jasper Spaans. Advertise on this site