netdev - Re: [PATCH] sky2: sky2 FE+ receive status workaround

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Message-ID: <20070927152317.GB12271@seehuhn.de>
Date:	Thu, 27 Sep 2007 16:23:29 +0100
From:	Jochen Voss <voss@...huhn.de>
To:	Stephen Hemminger <shemminger@...ux-foundation.org>
Cc:	Jeff Garzik <jgarzik@...ox.com>, netdev@...r.kernel.org
Subject: Re: [PATCH] sky2: sky2 FE+ receive status workaround

Hi,

On Thu, Sep 27, 2007 at 06:58:07AM -0700, Stephen Hemminger wrote:
> On Thu, 27 Sep 2007 09:14:11 +0100 Jochen Voß <voss@...huhn.de> wrote:
> > On 27 Sep 2007, at 01:58, Stephen Hemminger wrote:
> > > +	/* This chip has hardware problems that generates bogus status.
> > > +	 * So do only marginal checking and expect higher level protocols
> > > +	 * to handle crap frames.
> > > +	 */
> > > +	if (sky2->hw->chip_id == CHIP_ID_YUKON_FE_P &&
> > > +	    sky2->hw->chip_rev == CHIP_REV_YU_FE2_A0 &&
> > > +	    length != count)
> > > +		goto okay;
> > 
> > Shouldn't the condition be "length == count"?
> 
> No, the code is correct as is.  Basically if length == count, then
> the status field is correct, and the driver can go ahead and use it.
> If length != count, then the status is bogus but the data is okay.

Oh, I see.  Thanks for the explanation.

All the best,
Jochen
-- 
http://seehuhn.de/

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