linux-kernel - nand ecc

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Message-ID: <CAGnW=BbmpJqvbuznhxXsfZYz0wWMOQ851f+E3hWrAawOSZWtpQ@mail.gmail.com>
Date:	Tue, 23 Dec 2014 23:45:22 +0530
From:	punnaiah choudary kalluri <kalluripunnaiahchoudary@...il.com>
To:	Brian Norris <computersforpeace@...il.com>,
	David Woodhouse <dwmw2@...radead.org>
Cc:	"linux-mtd@...ts.infradead.org" <linux-mtd@...ts.infradead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Punnaiah Choudary <kpc528@...il.com>
Subject: nand ecc

Hi,

  I have the following confusions regarding the nand ecc algorithms:
Haming and BCH

Request your help to clarify the below concerns.

Hamming  Mode:
   What will happen if the data has more than two bit errors for codeword?
   Will the nand_correct_data() function returns uncorrectable ecc error ?

BCH mode:
 Assume that the BCH block can correct upto 24bit errors. what will
happen if the data
has more than 24 bit errors?
Will the nand_bch_correct_data() function returns uncorrectable ecc error?

Regards,
Punnaiah
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