linux-kernel - Re: [PATCH 12/13] mtd/docg3: add ECC correction code

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Message-ID: <20111029090946.GB12046@parrot.com>
Date:	Sat, 29 Oct 2011 11:09:46 +0200
From:	Ivan Djelic <ivan.djelic@...rot.com>
To:	Robert Jarzmik <robert.jarzmik@...e.fr>
CC:	"dwmw2@...radead.org" <dwmw2@...radead.org>,
	"dedekind1@...il.com" <dedekind1@...il.com>,
	"mikedunn@...sguy.com" <mikedunn@...sguy.com>,
	"linux-mtd@...ts.infradead.org" <linux-mtd@...ts.infradead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 12/13] mtd/docg3: add ECC correction code

On Sat, Oct 29, 2011 at 10:52:48AM +0200, Ivan Djelic wrote:
> Just a side note: if you need to get maximum performance from the BCH library,
> you can set fixed values for M and T in your Kconfig, with something like:
> 
>  config MTD_DOCG3
>         tristate "M-Systems Disk-On-Chip G3"
> 	select BCH

Oops, just noticed that you would also need to add this line here:
	select BCH_CONST_PARAMS

>         ---help---
>           This provides an MTD device driver for the M-Systems DiskOnChip
>           G3 devices.
> 
> if MTD_DOCG3
> config BCH_CONST_M
> 	default 14
> config BCH_CONST_T
> 	default 4
> endif
> 
> 
> The only drawback is that it won't work if you select your DOCG3 driver and, at
> the same time, other MTD drivers that also use fixed, but different parameters.
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