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From:   =?UTF-8?B?UmFmYcWCIE1pxYJlY2tp?= <zajec5@gmail.com>
Date:   Sat, 28 Apr 2018 08:44:04 +0200
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Subject: Re: [PATCH] ARM: BCM5301X: Fix NAND ECC parameters for Linksys Panamera
To:     Vivek Unune <npcomplete13@gmail.com>
Cc:     Florian Fainelli <f.fainelli@gmail.com>,
        Hauke Mehrtens <hauke@hauke-m.de>,
        Jon Mason <jonmason@broadcom.com>,
        bcm-kernel-feedback-list <bcm-kernel-feedback-list@broadcom.com>,
        Rob Herring <robh+dt@kernel.org>,
        Mark Rutland <mark.rutland@arm.com>,
        Russell King <linux@armlinux.org.uk>,
        "linux-arm-kernel@lists.infradead.org" 
        <linux-arm-kernel@lists.infradead.org>, devicetree@vger.kernel.org,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
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On 28 April 2018 at 06:19, Vivek Unune <npcomplete13@gmail.com> wrote:
> On Fri, Apr 27, 2018 at 10:05 AM, Vivek Unune <npcomplete13@gmail.com> wr=
ote:
>> On Wed, Apr 25, 2018 at 11:02:04AM +0200, Rafa=C5=82 Mi=C5=82ecki wrote:
>>>
>>> The easiest solution: ignore all these "error -74 (ECC error) while
>>> reading" errors (they may last for few minutes!). I believe UBI should
>>> simply recreate all pages it couldn't access and once you wait long
>>> enough, all your NAND flash will be using BCH8.
>>
>> Let me build the firmware with BCH-8 and wait it out. I'll report back m=
y
>> results.
>
> I can confirm that BCH-8 indeed works after letting it run through those
> ECC errors.
>
> Thanks!

Great, thanks! That controller behavior (reading BCH8 fine while
working in BCH4 mode) is really confusing.

--=20
Rafa=C5=82