Re: [Bug #10713] ehci splatter in 2.6.26-rc2

From: David Brownell
Date: Tue May 20 2008 - 02:13:34 EST

On Monday 19 May 2008, Lennert Buytenhek wrote:
> A bisect turns up this:
>         7329e211b987a493cbcfca0e98c60eb108ab42df is first bad commit
>         commit 7329e211b987a493cbcfca0e98c60eb108ab42df
>         Author: Alan Stern <stern@xxxxxxxxxxxxxxxxxxx>
>         Date:   Thu Apr 3 18:02:56 2008 -0400
>             USB: root hubs don't lie about their number of TTs
>             Currently EHCI root hubs enumerate with a bDeviceProtocol code
>             indicating that they possess a Transaction Translator.  However the
>             vast majority of controllers do not...
> And indeed, reverting this commit from 2.6.26-rc3 makes my system
> stop oopsing when I plug in the USB-PS/2 adapter (a low speed device),
> and makes it work again as it did in 2.6.25.
> Any other info I can provide or tests I can run?

I'm guessing that this has a version of the ARC/TDI/whoever-now-owns-it
IP, on a PCI bus? But without the integrated TT option?

If this is on a PCI bus, then try removing the ehci-pci.c line added
by that patch, see if that helps.

- Dave

To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at
Please read the FAQ at