netdev - Re: [PATCH 1/5] mtd: Initialize ->fail_addr early in mtd

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Date:   Sun, 18 Mar 2018 22:22:31 +0100
From:   Boris Brezillon <boris.brezillon@...tlin.com>
To:     David Woodhouse <dwmw2@...radead.org>,
        Brian Norris <computersforpeace@...il.com>,
        Boris Brezillon <boris.brezillon@...tlin.com>,
        Marek Vasut <marek.vasut@...il.com>,
        Richard Weinberger <richard@....at>,
        Cyrille Pitchen <cyrille.pitchen@...ev4u.fr>,
        linux-mtd@...ts.infradead.org
Cc:     Joern Engel <joern@...ybastard.org>,
        Robert Jarzmik <robert.jarzmik@...e.fr>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        Michael Ellerman <mpe@...erman.id.au>,
        Kyungmin Park <kyungmin.park@...sung.com>,
        Artem Bityutskiy <dedekind1@...il.com>,
        Solarflare linux maintainers <linux-net-drivers@...arflare.com>,
        Edward Cree <ecree@...arflare.com>,
        Bert Kenward <bkenward@...arflare.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linuxppc-dev@...ts.ozlabs.org, netdev@...r.kernel.org,
        devel@...verdev.osuosl.org,
        Miquel Raynal <miquel.raynal@...tlin.com>
Subject: Re: [PATCH 1/5] mtd: Initialize ->fail_addr early in mtd_erase()

On Mon, 12 Feb 2018 22:03:07 +0100
Boris Brezillon <boris.brezillon@...tlin.com> wrote:

> 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.

Applied the patchset after addressing Miquel's comments.

> 
> Signed-off-by: Boris Brezillon <boris.brezillon@...tlin.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);



-- 
Boris Brezillon, Bootlin (formerly Free Electrons)
Embedded Linux and Kernel engineering
https://bootlin.com