linux-kernel - Re: [PATCH 4/5] mtd: rawnand: qcom: update BBT related flags

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Message-ID: <20180718233637.49a39751@bbrezillon>
Date:   Wed, 18 Jul 2018 23:36:37 +0200
From:   Boris Brezillon <boris.brezillon@...tlin.com>
To:     Miquel Raynal <miquel.raynal@...tlin.com>
Cc:     Abhishek Sahu <absahu@...eaurora.org>,
        David Woodhouse <dwmw2@...radead.org>,
        Brian Norris <computersforpeace@...il.com>,
        Marek Vasut <marek.vasut@...il.com>,
        Richard Weinberger <richard@....at>,
        linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-mtd@...ts.infradead.org, Andy Gross <andy.gross@...aro.org>
Subject: Re: [PATCH 4/5] mtd: rawnand: qcom: update BBT related flags

On Wed, 18 Jul 2018 23:15:26 +0200
Miquel Raynal <miquel.raynal@...tlin.com> wrote:

> Hi Abhishek,
> 
> Abhishek Sahu <absahu@...eaurora.org> wrote on Fri,  6 Jul 2018
> 13:21:58 +0530:
> 
> > Remove the NAND_SKIP_BBTSCAN to use RAM based BBT.  
> 
> Unless I am understanding it the wrong way, NAND_SKIP_BBTSCAN will skip
> the scan of the on-chip BBT and will scan every block to construct a
> RAM, based BBT thanks to the BBM.
> 
> So flash based BBT is already unused and removing this flag is a
> mistake, right?

->scan_bbt() is also taking care of building the in-RAM BBT based on
BBM when no on-flash BBT is provided, so I think it's the right thing
to do.

> 
> > Flash based BBT is not used since bootloaders
> > doesn't have support for the same.
> > 
> > Signed-off-by: Abhishek Sahu <absahu@...eaurora.org>
> > ---  
> 
> Thanks,
> Miquèl
>