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

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Message-ID: <20180718234144.158217f2@xps13>
Date:   Wed, 18 Jul 2018 23:41:44 +0200
From:   Miquel Raynal <miquel.raynal@...tlin.com>
To:     Boris Brezillon <boris.brezillon@...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

Hi Boris,

Boris Brezillon <boris.brezillon@...tlin.com> wrote on Wed, 18 Jul 2018
23:36:37 +0200:

> 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.

Oh right. Then doing so is harmless.

Thanks for the clarification.
Miquèl