Re: USB: EHCI: Many "Waited too long for the async..."

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On Wed, 19 Sep 2012, Alan Stern wrote:

...
What's wrong with my setup? Maybe my .config might be a little bit
strange, I use this machine mainly for testing (and streaming DVB-C)

Probably nothing is wrong with your setup; most likely the problem is
in your EHCI hardware.  What does "lspci -v" show?

Attached as txt file.

Hardware by VIA.  Obviously their stuff doesn't work quite as well as
it should.

Nothing to add here :)


For now I think the best answer will be to downgrade those messages to
debug level.  If the controller isn't capable of turning the schedules
on or off after 20 ms, what can we do?

This patch should eliminate the warnings from the system log.  If you
enable CONFIG_USB_DEBUG they will show up again, but I think that's
reasonable.

Does everything work okay with the patch installed?

Yes, everything works fine. No more messages.

Thanks a lot,

 Thomas

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