linux-kernel - Re: [PATCH 1/8] mmc-core: Use kmalloc_array() in mmc_test_area

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Date:   Wed, 11 Jan 2017 03:59:20 +0200
From:   Andy Shevchenko <andy.shevchenko@...il.com>
To:     SF Markus Elfring <elfring@...rs.sourceforge.net>
Cc:     "linux-mmc@...r.kernel.org" <linux-mmc@...r.kernel.org>,
        Adrian Hunter <adrian.hunter@...el.com>,
        Harjani Ritesh <riteshh@...eaurora.org>,
        Jens Axboe <axboe@...com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Mike Christie <mchristi@...hat.com>,
        Shawn Lin <shawn.lin@...k-chips.com>,
        Ulf Hansson <ulf.hansson@...aro.org>,
        Wolfram Sang <wsa+renesas@...g-engineering.com>,
        LKML <linux-kernel@...r.kernel.org>,
        kernel-janitors@...r.kernel.org
Subject: Re: [PATCH 1/8] mmc-core: Use kmalloc_array() in mmc_test_area_init()

On Sun, Jan 8, 2017 at 11:42 PM, SF Markus Elfring
<elfring@...rs.sourceforge.net> wrote:
> From: Markus Elfring <elfring@...rs.sourceforge.net>
> Date: Sun, 8 Jan 2017 18:44:26 +0100
>
> * A multiplication for the size determination of a memory allocation
>   indicated that an array data structure should be processed.
>   Thus use the corresponding function "kmalloc_array".
>
>   This issue was detected by using the Coccinelle software.
>
> * Replace the specification of a data structure by a pointer dereference
>   to make the corresponding size determination a bit safer according to
>   the Linux coding style convention.

For the whole series FWIW:
Reviewed-by: Andy Shevchenko <andy.shevchenko@...il.com>


P.S. Few years back I run those tests a lot, even did some
modifications, but now Nokia Mobile just gone :-)

>
> Signed-off-by: Markus Elfring <elfring@...rs.sourceforge.net>
> ---
>  drivers/mmc/core/mmc_test.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/mmc/core/mmc_test.c b/drivers/mmc/core/mmc_test.c
> index 3ab6e52d106c..e85ef503d7ce 100644
> --- a/drivers/mmc/core/mmc_test.c
> +++ b/drivers/mmc/core/mmc_test.c
> @@ -1579,7 +1579,7 @@ static int mmc_test_area_init(struct mmc_test_card *test, int erase, int fill)
>         if (!t->mem)
>                 return -ENOMEM;
>
> -       t->sg = kmalloc(sizeof(struct scatterlist) * t->max_segs, GFP_KERNEL);
> +       t->sg = kmalloc_array(t->max_segs, sizeof(*t->sg), GFP_KERNEL);
>         if (!t->sg) {
>                 ret = -ENOMEM;
>                 goto out_free;
> --
> 2.11.0
>



-- 
With Best Regards,
Andy Shevchenko