linux-kernel - Re: [PATCH v4 5/5] mtd: rawnand: brcmnand: Fix mtd oobsize

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Date:   Thu, 13 Jul 2023 09:58:30 +0200
From:   Miquel Raynal <miquel.raynal@...tlin.com>
To:     William Zhang <william.zhang@...adcom.com>,
        Broadcom Kernel List <bcm-kernel-feedback-list@...adcom.com>,
        Linux MTD List <linux-mtd@...ts.infradead.org>
Cc:     Miquel Raynal <miquel.raynal@...tlin.com>, f.fainelli@...il.com,
        rafal@...ecki.pl, kursad.oney@...adcom.com,
        joel.peshkin@...adcom.com, computersforpeace@...il.com,
        anand.gore@...adcom.com, dregan@...l.com, kamal.dasu@...adcom.com,
        tomer.yacoby@...adcom.com, dan.beygelman@...adcom.com,
        Frieder Schrempf <frieder.schrempf@...tron.de>,
        linux-kernel@...r.kernel.org,
        Vignesh Raghavendra <vigneshr@...com>,
        Richard Weinberger <richard@....at>,
        Boris Brezillon <bbrezillon@...nel.org>,
        Kamal Dasu <kdasu.kdev@...il.com>
Subject: Re: [PATCH v4 5/5] mtd: rawnand: brcmnand: Fix mtd oobsize

On Thu, 2023-07-06 at 18:29:09 UTC, William Zhang wrote:
> brcmnand controller can only access the flash spare area up to certain
> bytes based on the ECC level. It can be less than the actual flash spare
> area size. For example, for many NAND chip supporting ECC BCH-8, it has
> 226 bytes spare area. But controller can only uses 218 bytes. So brcmand
> driver overrides the mtd oobsize with the controller's accessible spare
> area size. When the nand base driver utilizes the nand_device object, it
> resets the oobsize back to the actual flash spare aprea size from
> nand_memory_organization structure and controller may not able to access
> all the oob area as mtd advises.
> 
> This change fixes the issue by overriding the oobsize in the
> nand_memory_organization structure to the controller's accessible spare
> area size.
> 
> Fixes: a7ab085d7c16 ("mtd: rawnand: Initialize the nand_device object")
> Signed-off-by: William Zhang <william.zhang@...adcom.com>

Applied to https://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux.git nand/next, thanks.

Miquel