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Date: Sat, 24 Jun 2017 22:12:19 +0200
From: Boris Brezillon <boris.brezillon@free-electrons.com>
To: Brian Norris <computersforpeace@gmail.com>
Cc: Robert Jarzmik <robert.jarzmik@free.fr>, David Woodhouse
 <dwmw2@infradead.org>, Marek Vasut <marek.vasut@gmail.com>, Richard
 Weinberger <richard@nod.at>, Cyrille Pitchen <cyrille.pitchen@wedev4u.fr>,
 linux-mtd@lists.infradead.org, Kyungmin Park <kyungmin.park@samsung.com>
Subject: Re: [PATCH] mtd: Fallback to ->_read/write_oob() when
 ->_read/write() is missing
Message-ID: <20170624221219.703762e1@bbrezillon>
In-Reply-To: <20170622212606.GF14148@google.com>
References: <20170611204255.18622-1-boris.brezillon@free-electrons.com>
 <20170622212606.GF14148@google.com>
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Le Thu, 22 Jun 2017 14:26:06 -0700,
Brian Norris <computersforpeace@gmail.com> a =C3=A9crit :

> On Sun, Jun 11, 2017 at 10:42:55PM +0200, Boris Brezillon wrote:
> > Some MTD sublayers/drivers are implementing ->_read/write_oob() and
> > providing dummy wrappers for their ->_read/write() implementations.
> > Let the core handle this case instead of duplicating the logic.
> >=20
> > Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
> > ---
> > Note that the goldfish_nand driver (currently in staging) has not been
> > updated because some the ops->len !=3D mtd->writesize check done in
> > goldfish_nand_read/write_oob() prevents us from using this function as
> > a fallback for ->_read/write().
> >=20
> > This behavior is buggy anyway, because the core expects drivers
> > implementing ->_read_oob() to support reading more than ->writesize in
> > a single call. Probably something we should fix. =20
>=20
> Looks OK to me:
>=20
> Acked-by: Brian Norris <computersforpeace@gmail.com>
>=20
> This touches NAND drivers more than core MTD stuff, so feel free to take
> it in your branch.

Applied to nand/next.