linux-kernel - Re: [PATCH] ahci: enable GHC.AE bit before set GHC.HR

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Date:	Wed, 26 Sep 2007 17:10:30 +0100
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Jeff Garzik <jeff@...zik.org>
Cc:	Peer Chen <peerchen@...il.com>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	akpm <akpm@...ux-foundation.org>,
	linux-ide <linux-ide@...r.kernel.org>
Subject: Re: [PATCH] ahci: enable GHC.AE bit before set GHC.HR

On Wed, 26 Sep 2007 10:33:28 -0400
Jeff Garzik <jeff@...zik.org> wrote:

> Alan Cox wrote:
> >>> NAK - mmio is an iomap so writel and readl are the wrong things to use
> >> The patch is consistent with the rest of the driver.
> >> You are welcome to submit a patch to convert ahci to using ioremap.
> > 
> > You could just flip the relevant function to use ioread while you are
> > tidying it up, instead of spreading new bugs into the code.
> 
> No, as I just noted above, the proper fix for this driver is to use 
> ioremap rather than pci_iomap.
> 
> Adding support to ahci for legacy PIO is completely pointless.

iomap isn't just for legacy PIO. It allows us to handle future weird
mappings in ways ioremap cannot.
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