linux-kernel - Re: [2.6.27-rc7 vs 2.6.29 Regresion] Wifi Network Slownes rt2500pci

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Message-Id: <200906022353.44284.IvDoorn@gmail.com>
Date:	Tue, 2 Jun 2009 23:53:43 +0200
From:	Ivo van Doorn <ivdoorn@...il.com>
To:	alejandro.riveira@...il.com
Cc:	linux-wireless <linux-wireless@...r.kernel.org>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	linville@...driver.com, Greg KH <greg@...ah.com>,
	"Rafael J. Wysocki" <rjw@...k.pl>
Subject: Re: [2.6.27-rc7 vs 2.6.29 Regresion] Wifi Network Slownes rt2500pci

On Tuesday 02 June 2009, Alejandro Riveira Fernández wrote:
> El mar, 02-06-2009 a las 18:34 +0200, Ivo van Doorn escribió:
> > On Tuesday 02 June 2009, Alejandro Riveira Fernández wrote:
> 
> [...]
> 
> > > ICMP ECHO REQUEST
> > > 
> > > Any advance?
> > 
> > Well I checked the dumps from the bugreport, but like I expected
> > the only difference is that with the slow speed the correct value
> > is written, and the fast speed the wrong value is written.
> 
> So my chip works better with incorrect values written in its registers?

Apparently, probably because some other register is set to an incorrect value,
but I have no idea which one that would be.

> What about other chips out there do they prefer wrong values too ;)
> Maybe what we thought wrong values are not that wrong ?

They are wrong. That exact register initialization is pretty straightforward
in the original Ralink driver on which rt2x00 is based.

Ivo
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