I'm releasing the alpha and free to play around this issue. Using 2.5 is not an option
for me since it's not released yet, i will make sure that my driver will work on 2.6 when it will be released.
For now if somebody can guide me a little bit i would like to fix ENXIO issue, on 2.4 kernels. The complete
back ports seems to much work to me, but sort of retry on submit can be an option. I will take an
usb-uhci as start point it seems to be a more common ( at least in most distribution this one installed by
default) .
Is retry is enough if i found queued urb ? should i check recipient, seems like only device is valid recipient for
retry ? Any over input in subject ?
Regards Ilya.
At 17:54 12/12/2002 +0100, Oliver Neukum wrote:
> ENXIO errors are unique to the UHCI drivers in all 2.4 and 2.5 upto > 2.5.43 (?). It's because the UHCI driver's didn't allow queued > Control URBs, and when you get that some other driver has a URB in > progress on the DCP. > > Find out what other driver is talking to your device. Keep in mind > that the initial driver binding process can many seconds (I think > there is a 2 or 3 second sleep in the hotplug script...). > > Or, try the latest 2.5 kernel, it should work great.That is not a satisfactory answer. A device may have several interfaces, which may all legitimately send control requests at the same time. Returning ENXIO is simply a bug under these circumstances. Now the correct fix would be to backport the 2.5 UHCI driver. Failing that, usbcore must retry on ENXIO. While we are at it, how about a complete backport? Regards Oliver
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