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From: Richard Weinberger <richard@nod.at>
To: Boris Brezillon <boris.brezillon@bootlin.com>
Cc: David Woodhouse <dwmw2@infradead.org>,
 Brian Norris <computersforpeace@gmail.com>,
 Marek Vasut <marek.vasut@gmail.com>,
 Cyrille Pitchen <cyrille.pitchen@wedev4u.fr>, linux-mtd@lists.infradead.org,
 Joern Engel <joern@lazybastard.org>, Robert Jarzmik <robert.jarzmik@free.fr>,
 Benjamin Herrenschmidt <benh@kernel.crashing.org>,
 Paul Mackerras <paulus@samba.org>, Michael Ellerman <mpe@ellerman.id.au>,
 Kyungmin Park <kyungmin.park@samsung.com>,
 Artem Bityutskiy <dedekind1@gmail.com>,
 Solarflare linux maintainers <linux-net-drivers@solarflare.com>,
 Edward Cree <ecree@solarflare.com>, Bert Kenward <bkenward@solarflare.com>,
 Greg Kroah-Hartman <gregkh@linuxfoundation.org>, linuxppc-dev@lists.ozlabs.org,
 netdev@vger.kernel.org, devel@driverdev.osuosl.org,
 Miquel Raynal <miquel.raynal@bootlin.com>
Subject: Re: [PATCH 1/5] mtd: Initialize ->fail_addr early in mtd_erase()
Date: Mon, 12 Feb 2018 22:47:42 +0100
Message-ID: <253082441.XNb7FBEycW@blindfold>
In-Reply-To: <20180212210311.23244-2-boris.brezillon@bootlin.com>
References: <20180212210311.23244-1-boris.brezillon@bootlin.com>
 <20180212210311.23244-2-boris.brezillon@bootlin.com>
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Am Montag, 12. Februar 2018, 22:03:07 CET schrieb Boris Brezillon:
> mtd_erase() can return an error before ->fail_addr is initialized to
> MTD_FAIL_ADDR_UNKNOWN. Move this initialization at the very beginning
> of the function.
> 
> Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
> ---
>  drivers/mtd/mtdcore.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/mtd/mtdcore.c b/drivers/mtd/mtdcore.c
> index a1c94526fb88..c87859ff338b 100644
> --- a/drivers/mtd/mtdcore.c
> +++ b/drivers/mtd/mtdcore.c
> @@ -953,6 +953,8 @@ EXPORT_SYMBOL_GPL(__put_mtd_device);
>   */
>  int mtd_erase(struct mtd_info *mtd, struct erase_info *instr)
>  {
> +	instr->fail_addr = MTD_FAIL_ADDR_UNKNOWN;
> +
>  	if (!mtd->erasesize || !mtd->_erase)
>  		return -ENOTSUPP;
> 
> @@ -961,7 +963,6 @@ int mtd_erase(struct mtd_info *mtd, struct erase_info
> *instr) if (!(mtd->flags & MTD_WRITEABLE))
>  		return -EROFS;
> 
> -	instr->fail_addr = MTD_FAIL_ADDR_UNKNOWN;
>  	if (!instr->len) {
>  		instr->state = MTD_ERASE_DONE;
>  		mtd_erase_callback(instr);

Reviewed-by: Richard Weinberger <richard@nod.at>

Thanks,
//richard