linux-kernel - Re: [PATCH v2] port ricoh

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Date:	Fri, 8 Jan 2010 07:40:01 -0800
From:	Philip Langdale <philipl@...rt.org>
To:	Maxim Levitsky <maximlevitsky@...il.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Pierre Ossman <pierre@...man.eu>,
	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2] port ricoh_mmc to be pci quirk

On Fri, 08 Jan 2010 17:24:44 +0200
Maxim Levitsky <maximlevitsky@...il.com> wrote:

> On Thu, 2009-11-26 at 23:55 -0800, Philip Langdale wrote: 
> > On Fri, 27 Nov 2009 01:53:04 +0200
> > Maxim Levitsky <maximlevitsky@...il.com> wrote:
> > 
> > > >From 2d3002e29c329d76ca4e26d9f427814151a9648c Mon Sep 17 00:00:00
> > > >2001
> > > From: Maxim Levitsky <maximlevitsky@...il.com>
> > > Date: Fri, 27 Nov 2009 00:53:28 +0200
> > > Subject: [PATCH] port ricoh_mmc to be pci quirk
> > > 
> > > This patch solves nasty problem original driver has.
> > > Original goal of the ricoh_mmc was to disable this device because
> > > then, mmc cards can be read using standard SDHCI controller,
> > > thus avoiding writing of yet another driver.
> > > However, the act of disablement, makes other pci functions that
> > > belong to this controller (xD and memstick) shift up one level,
> > > thus pci core has now wrong idea about these devices.
> > > 
> > > To fix this issue, this patch moves the driver into pci quirk
> > > section, thus it is executes before the pci is enumerated, and
> > > therefore solving that issue, also same sequence of commands is
> > > performed on resume for same reasons.
> > > 
> > > Also regardless of the above, this way is cleaner.
> > > 
> > > You still need to set CONFIG_MMC_RICOH_MMC
> > > to enable this quirk
> > 
> > I like it. Only comment is that I'd like the printks to identify
> > which controller is involved. If Andrew is happy with the CONFIG
> > mechanism, then you've got an ack from me.
> > 
> > Thanks for doing this.
> 
> Hi, do you plan to include this patch in the kernel?

That's Andrew's call, but to the extent that my opinion matters, I
support it being included.
 
--phil
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