Re: High speed devices with kernel 2.6.21.5.

On 7/11/07, Alan Stern <[email protected]> wrote:
> On Wed, 11 Jul 2007, Branden Sletteland wrote:
>
> > None of these patches exhibited the problem.   The third one couldn't
> > read the USB device descriptor, but the 4th patch fixed that.
> >
> > I noticed these patches only touched files in drivers/usb/host, did
> > anything change in drivers/usb/core or other places in the same time
> > frame.
>
> Certainly.  However the problem starts when your device is identified
> as full speed rather than high speed, and that identification is made
> within ehci-hcd.
>
> Maybe you could try taking the entire drivers/usb/host directory from
> 2.6.21, putting it in a 2.6.20 source tree, and building it.  I don't
> know if that will work, but it's worth a try.
>

Tried this and it actually built, exhibited the same full speed
problem as 2.6.21-rc1, so that seems to narrow it down to that
directory.

Was the last patch in the previous emails the version of the files
that became 2.6.21-rc1 or should I start bisecting between that and
rc1.

> > Or are there other patches prior to 2.6.21-rc1 that I can try?
>
> To get the complete set of changes you need to use Git.  Then you can
> perform a bisection to find exactly where the problem starts.
>
> Linus Torvalds recently posted a message including a quick summary of
> how to do this.  See
>
> http://marc.info/?l=linux-kernel&m=118408208816556&w=2
>
> Alan Stern
>
>

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