linux-kernel - Re: [PATCH] Samsung S3C24xx SD/MMC driver

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Date:	Wed, 19 Dec 2007 18:53:34 +0100
From:	Harald Welte <laforge@...nmoko.org>
To:	Pierre Ossman <drzeus-mmc@...eus.cx>
Cc:	linux-kernel@...r.kernel.org, tk@...ntech.de, ben-linux@...ff.org
Subject: Re: [PATCH] Samsung S3C24xx SD/MMC driver

Hi Pierre,

thanks for your comments.

On Wed, Dec 19, 2007 at 05:54:33PM +0100, Pierre Ossman wrote:
> Well, my biggest beef with this driver is the excessive debug code. I
> did a cleanup in an older version of the driver, but it shouldn't be
> to difficult to do the same for this one. I've included my patch for
> reference.

ok, I'll re-work the patch according to your sample and re-submit.

The debugging was needed during development, and might still be needed
to debug some weird issues.

btw: OpenMoko is currently working on an ar6k wifi driver on top of the 
new mainline kernel SDIO support using the s3c_mci host controller
driver as basis.  So within not-too-distant-time we should also be able
to have SDIO working and tested on s3c_mci.

> > Index: linux-2.6/drivers/mmc/host/s3cmci.c
> > ===================================================================
> > --- /dev/null
> > +++ linux-2.6/drivers/mmc/host/s3cmci.c
> 
> > +#include <linux/mmc/mmc.h>
> 
> This is always a warning sign. It should never be needed in a host driver.

ok, will see how to remove it.

> > +	*words = sg->length >> 2;
> > +	*pointer = page_address(sg_page(sg)) + sg->offset;
> > +
> 
> The length might not be a multiple of four. And it might also be
> completely unaligned. Make sure you can either handle such requests,
> or fail them with -EINVAL.

ok, will update before submitting the next version.
-- 
- Harald Welte <laforge@...nmoko.org>          	        http://openmoko.org/
============================================================================
Software for the world's first truly open Free Software mobile phone
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