linux-kernel - Re: SATA_SIL on IXP425 workaround

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Message-ID: <20100114210050.2c99c2b1@lxorguk.ukuu.org.uk>
Date:	Thu, 14 Jan 2010 21:00:50 +0000
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Bartlomiej Zolnierkiewicz <bzolnier@...il.com>
Cc:	Krzysztof Halasa <khc@...waw.pl>, linux-ide@...r.kernel.org,
	lkml <linux-kernel@...r.kernel.org>
Subject: Re: SATA_SIL on IXP425 workaround

> I think that you misinterpreted the issue -- according to Krzysztof MMIO
> works just fine, only 8/16-bit MMIO reads are a problem (please note that
> using mixed PIO/MMIO access is still a win over pure PIO access and also
> that sata_sil doesn't support pure non-MMIO operations currently)..

Have we got timing measurements to prove that ?
> 
> However if it gets fixed in the upstream kernel in some other way I'll
> simply drop the patch during the next re-base of my tree (I just collect
> ATA stuff that looks useful/interesting to me and which otherwise may
> become lost)..

And that's a good thing. The question was aimed at Krzysztof. Really we
need to keep platform specific weirdness out of core drivers or the
rapidly turn into a mess.
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