linux-kernel - Re: [PATCH v3 1/3] mtd: nand: omap2: Update nerrors using ecc.strength

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Message-ID: <50C1C784.4040209@ti.com>
Date:	Fri, 7 Dec 2012 16:10:04 +0530
From:	Sekhar Nori <nsekhar@...com>
To:	"Philip, Avinash" <avinashphilip@...com>
CC:	"dwmw2@...radead.org" <dwmw2@...radead.org>,
	"artem.bityutskiy@...ux.intel.com" <artem.bityutskiy@...ux.intel.com>,
	"Mohammed, Afzal" <afzal@...com>,
	"tony@...mide.com" <tony@...mide.com>,
	"broonie@...nsource.wolfsonmicro.com" 
	<broonie@...nsource.wolfsonmicro.com>,
	"rmk+kernel@....linux.org.uk" <rmk+kernel@....linux.org.uk>,
	"gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
	"linux-mtd@...ts.infradead.org" <linux-mtd@...ts.infradead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"devicetree-discuss@...ts.ozlabs.org" 
	<devicetree-discuss@...ts.ozlabs.org>,
	"linux-doc@...r.kernel.org" <linux-doc@...r.kernel.org>,
	"linux-omap@...r.kernel.org" <linux-omap@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"Hebbar, Gururaja" <gururaja.hebbar@...com>,
	"ivan.djelic@...rot.com" <ivan.djelic@...rot.com>
Subject: Re: [PATCH v3 1/3] mtd: nand: omap2: Update nerrors using ecc.strength

On 12/5/2012 6:13 PM, Philip, Avinash wrote:
> On Wed, Dec 05, 2012 at 17:33:37, Nori, Sekhar wrote:
>> Hi Avinash,
>>
>> On 11/29/2012 5:16 PM, Philip, Avinash wrote:
>>> Update number of errors using nand ecc strength.
>>> Also add macro definitions BCH8_ERROR_MAX & BCH4_ERROR_MAX
>>
>> Can you please describe why the original method of setting nerrors was
>> incorrect? Was it causing any issues in any particular configuration?
> 
> It affects the reusability of the code. For example BCH8 with AM335x RBL 
> compatibility requires  14 bytes instead of 13 byte. So setting nerrors
> with
> 	nerrors = (info->nand.ecc.bytes == 13) ? 8 : 4;
> will break am335x RBL compatibility.

This should be summarized in the patch description so the motivation is
clear to those who read the history later.

Thanks,
Sekhar
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