linux-kernel - Re: [PATCH v3 16/52] mtd: nand: use mtd_set

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Message-ID: <20160305095337.4a9e50fe@bbrezillon>
Date:	Sat, 5 Mar 2016 09:53:37 +0100
From:	Boris Brezillon <boris.brezillon@...e-electrons.com>
To:	Brian Norris <computersforpeace@...il.com>
Cc:	David Woodhouse <dwmw2@...radead.org>,
	linux-mtd@...ts.infradead.org, Daniel Mack <daniel@...que.org>,
	Haojian Zhuang <haojian.zhuang@...il.com>,
	Robert Jarzmik <robert.jarzmik@...e.fr>,
	Kukjin Kim <kgene@...nel.org>,
	Krzysztof Kozlowski <k.kozlowski@...sung.com>,
	linux-samsung-soc@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	Ralf Baechle <ralf@...ux-mips.org>, linux-mips@...ux-mips.org,
	Nicolas Ferre <nicolas.ferre@...el.com>,
	Jean-Christophe Plagniol-Villard <plagnioj@...osoft.com>,
	Alexandre Belloni <alexandre.belloni@...e-electrons.com>,
	Wenyou Yang <wenyou.yang@...el.com>,
	Josh Wu <rainyfeeling@...look.com>,
	Ezequiel Garcia <ezequiel.garcia@...e-electrons.com>,
	Maxime Ripard <maxime.ripard@...e-electrons.com>,
	Chen-Yu Tsai <wens@...e.org>, linux-sunxi@...glegroups.com,
	Stefan Agner <stefan@...er.ch>,
	Kyungmin Park <kyungmin.park@...sung.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	devel@...verdev.osuosl.org, linux-kernel@...r.kernel.org,
	punnaiah choudary kalluri <punnaia@...inx.com>,
	Priit Laes <plaes@...es.org>,
	Kamal Dasu <kdasu.kdev@...il.com>,
	bcm-kernel-feedback-list@...adcom.com, linux-api@...r.kernel.org
Subject: Re: [PATCH v3 16/52] mtd: nand: use mtd_set_ecclayout() where
 appropriate

Hi Brian,

On Fri, 4 Mar 2016 18:26:21 -0800
Brian Norris <computersforpeace@...il.com> wrote:

> On Fri, Feb 26, 2016 at 01:57:24AM +0100, Boris Brezillon wrote:
> > Use the mtd_set_ecclayout() helper instead of directly assigning the
> > mtd->ecclayout field.
> > 
> > Signed-off-by: Boris Brezillon <boris.brezillon@...e-electrons.com>
> > ---
> >  drivers/mtd/nand/nand_base.c | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> > 
> > diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c
> > index 17504f2..5093a3c 100644
> > --- a/drivers/mtd/nand/nand_base.c
> > +++ b/drivers/mtd/nand/nand_base.c
> > @@ -4288,7 +4288,7 @@ int nand_scan_tail(struct mtd_info *mtd)
> >  		ecc->write_oob_raw = ecc->write_oob;
> >  
> >  	/* propagate ecc info to mtd_info */
> > -	mtd->ecclayout = ecc->layout;
> > +	mtd_set_ecclayout(mtd, ecc->layout);
> 
> I'm having trouble applying this one. For the life of me, I can't figure
> out where you got this context from. This block only appears much later
> in nand_scan_tail()...
> 

Patch 7 has moved this section upper in the function to avoid problems
when calculating the number of available/free OOB bytes.

> Do you think you could post a git tree with your intended changes? I may
> just try to pull something in like that instead.

Yep, it's there [1]. Note that this branch contains the two fixes I
talked about with Harvey and Stephan. I also made a few changes to use
ecc->total instead of calculating (ecc->steps * ecc->bytes).

> 
> BTW, I'm not sure the OMAP refactorings are going to come in time, but I
> was planning to pull those directly from the TI folks (i.e., they won't
> be rebased on l2-mtd.git), since there's some intermingling of platform
> changes there. I think I can fix the conflicts fine, but FYI.

Okay, then I'll let you deal with those conflicts. I can check your
conflict resolution if you're unsure.

Thanks,

Boris


-- 
Boris Brezillon, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com