linux-kernel - Re: [PATCH v2 0/3] mtd: nand: OMAP: ELM error correction support for BCH ecc

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Message-ID: <1354278498.30168.117.camel@sauron.fi.intel.com>
Date:	Fri, 30 Nov 2012 14:28:18 +0200
From:	Artem Bityutskiy <artem.bityutskiy@...ux.intel.com>
To:	"Philip, Avinash" <avinashphilip@...com>
Cc:	"ivan.djelic@...rot.com" <ivan.djelic@...rot.com>,
	"Mohammed, Afzal" <afzal@...com>,
	"linux-doc@...r.kernel.org" <linux-doc@...r.kernel.org>,
	"tony@...mide.com" <tony@...mide.com>,
	"gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
	"devicetree-discuss@...ts.ozlabs.org" 
	<devicetree-discuss@...ts.ozlabs.org>,
	"broonie@...nsource.wolfsonmicro.com" 
	<broonie@...nsource.wolfsonmicro.com>,
	"Nori, Sekhar" <nsekhar@...com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"Hebbar, Gururaja" <gururaja.hebbar@...com>,
	"linux-mtd@...ts.infradead.org" <linux-mtd@...ts.infradead.org>,
	"rmk+kernel@....linux.org.uk" <rmk+kernel@....linux.org.uk>,
	"dwmw2@...radead.org" <dwmw2@...radead.org>
Subject: Re: [PATCH v2 0/3] mtd: nand: OMAP: ELM error correction support
 for BCH ecc

On Thu, 2012-11-22 at 14:37 +0000, Philip, Avinash wrote:
> Idea here is to make faster scanning of erased page without bit flips.
> For omap nand driver ecc reported by hardware is non-zero and non
> 0xff.
> So comparing with the standard vector for erased page and skipping
> error
> correction for erased page without bit flips.

So you mean that when you read a page, and you see there are bit-flips,
you start correcting them. But if you notice that the page is actually
an erased page, you optimize this case by not running the correction
machinery, but just filling the buffer with 0xFFs. Right?
> 
-- 
Best Regards,
Artem Bityutskiy

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