linux-kernel - Re: [2.6.26-rc4] Problems with rt2x00 USB interface on powerpc

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Message-ID: <20080613045209.GA2421@ime.usp.br>
Date:	Fri, 13 Jun 2008 01:52:09 -0300
From:	Rogério Brito <rbrito@....usp.br>
To:	Ivo van Doorn <ivdoorn@...il.com>
Cc:	"John W. Linville" <linville@...driver.com>,
	linux-kernel@...r.kernel.org, rbrito@....usp.br
Subject: Re: [2.6.26-rc4] Problems with rt2x00 USB interface on powerpc

Hi again, Ivo and John.

I have finally made the rt2x00 work on the x86-64 with the kernel
2.6.25.

Just as a reminder:

* with kernel 2.6.26-rc4, I could associate with the AP, but could not
  get a DHCP lease;
* with kernel 2.6.26-rc5, I could not even associate with the AP.

So, it seems that we have some regressions here. :-(

> Well, I'm attaching the diff between the regdump from the earlier try
> on the iBook and the regdump from this x86-64. I think that some
> conclusions may be drawn from it, since it seems to be your domain of
> expertise.

I'm attaching here 3 files: the old output from regdump (taken from the
ibook), the new, working (with kernel 2.6.25.4) regdump and their diff.
Notice that there are some inverted values there, but they are shorts
(i.e., 16-bit integers) that are inverted, instead of the inverted
values being bytes.

I think that this may mean that your work may be easier on debugging the
driver (I hope so!).

Thanks for any help, Rogério Brito.

-- 
Rogério Brito : rbrito@...ckenzie,ime.usp}.br : GPG key 1024D/7C2CAEB8
http://www.ime.usp.br/~rbrito : http://meusite.mackenzie.com.br/rbrito
Projects: algorithms.berlios.de : lame.sf.net : vrms.alioth.debian.org

View attachment "old.output-regdump.txt" of type "text/plain" (3665 bytes)

View attachment "new.output-regdump.txt" of type "text/plain" (3664 bytes)

View attachment "differences.txt" of type "text/plain" (4010 bytes)