From: Marek Vasut <marek.vasut@gmail.com>
To: SF Markus Elfring <elfring@users.sourceforge.net>,
linux-mtd@lists.infradead.org,
Boris Brezillon <boris.brezillon@free-electrons.com>,
Brian Norris <computersforpeace@gmail.com>,
Cyrille Pitchen <cyrille.pitchen@atmel.com>,
David Woodhouse <dwmw2@infradead.org>,
Denys Vlasenko <dvlasenk@redhat.com>,
Richard Weinberger <richard@nod.at>
Cc: LKML <linux-kernel@vger.kernel.org>, kernel-janitors@vger.kernel.org
Subject: Re: [PATCH 01/18] mtd-cfi_cmdset_0001: Use kmalloc_array() in cfi_intelext_partition_fixup()
Date: Wed, 11 Jan 2017 22:59:52 +0100 [thread overview]
Message-ID: <31f8448f-aba7-965a-e924-e1ec63eecbaf@gmail.com> (raw)
In-Reply-To: <f74ef6ca-7159-ba15-b7a3-0a45e522729f@users.sourceforge.net>
On 01/11/2017 09:35 PM, SF Markus Elfring wrote:
> From: Markus Elfring <elfring@users.sourceforge.net>
> Date: Tue, 10 Jan 2017 18:48:34 +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.
>
> Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
> ---
> drivers/mtd/chips/cfi_cmdset_0001.c | 4 +++-
> 1 file changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/mtd/chips/cfi_cmdset_0001.c b/drivers/mtd/chips/cfi_cmdset_0001.c
> index 5e1b68cbcd0a..68227aa74d22 100644
> --- a/drivers/mtd/chips/cfi_cmdset_0001.c
> +++ b/drivers/mtd/chips/cfi_cmdset_0001.c
> @@ -746,7 +746,9 @@ static int cfi_intelext_partition_fixup(struct mtd_info *mtd,
> newcfi = kmalloc(sizeof(struct cfi_private) + numvirtchips * sizeof(struct flchip), GFP_KERNEL);
> if (!newcfi)
> return -ENOMEM;
> - shared = kmalloc(sizeof(struct flchip_shared) * cfi->numchips, GFP_KERNEL);
> + shared = kmalloc_array(cfi->numchips,
> + sizeof(*shared),
> + GFP_KERNEL);
You can keep this on a single line, no need for the linebreak. It
doesn't violate the 80-chars per line rule IMO.
> if (!shared) {
> kfree(newcfi);
> return -ENOMEM;
>
--
Best regards,
Marek Vasut
next prev parent reply other threads:[~2017-01-11 22:01 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-01-11 20:34 [PATCH 00/18] MTD-CFI: Fine-tuning for several function implementations SF Markus Elfring
2017-01-11 20:35 ` [PATCH 01/18] mtd-cfi_cmdset_0001: Use kmalloc_array() in cfi_intelext_partition_fixup() SF Markus Elfring
2017-01-11 21:59 ` Marek Vasut [this message]
2017-01-11 20:37 ` [PATCH 02/18] mtd-cfi_cmdset_0001: Improve another size determination " SF Markus Elfring
2017-01-11 21:57 ` Marek Vasut
2017-01-11 20:38 ` [PATCH 03/18] mtd-cfi_cmdset_0001: Add some spaces for better code readability SF Markus Elfring
2017-01-12 9:19 ` Dan Carpenter
2017-01-11 20:39 ` [PATCH 04/18] mtd-cfi_cmdset_0001: Delete an unnecessary variable initialisation in do_write_oneword() SF Markus Elfring
2017-01-11 20:40 ` [PATCH 05/18] mtd-cfi_cmdset_0001: Use common error handling code " SF Markus Elfring
2017-01-11 20:41 ` [PATCH 06/18] mtd-cfi_cmdset_0001: Use kcalloc() in cfi_intelext_setup() SF Markus Elfring
2017-01-11 20:42 ` [PATCH 07/18] mtd-cfi_cmdset_0001: One function call and an unnecessary check less " SF Markus Elfring
2017-01-11 20:43 ` [PATCH 08/18] mtd-cfi_cmdset_0001: Rename a jump label " SF Markus Elfring
2017-01-11 20:44 ` [PATCH 09/18] mtd-cfi_cmdset_0002: Use kmalloc_array() in cfi_amdstd_setup() SF Markus Elfring
2017-01-11 20:45 ` [PATCH 10/18] mtd-cfi_cmdset_0002: One function call less in cfi_amdstd_setup() after error detection SF Markus Elfring
2017-01-11 20:46 ` [PATCH 11/18] mtd-cfi_cmdset_0002: Rename a jump label in cfi_amdstd_setup() SF Markus Elfring
2017-01-11 20:47 ` [PATCH 12/18] mtd-cfi_cmdset_0002: Add some spaces for better code readability SF Markus Elfring
2017-01-11 20:48 ` [PATCH 13/18] mtd-cfi_cmdset_0002: Delete an unnecessary variable initialisation in do_write_oneword() SF Markus Elfring
2017-01-11 20:49 ` [PATCH 14/18] mtd-cfi_cmdset_0002: Use common error handling code " SF Markus Elfring
2017-01-11 20:50 ` [PATCH 15/18] mtd-cfi_cmdset_0002: Use kcalloc() in cfi_ppb_unlock() SF Markus Elfring
2017-01-11 20:51 ` [PATCH 16/18] mtd-cfi_cmdset_0020: Use kmalloc_array() in cfi_staa_setup() SF Markus Elfring
2017-01-11 20:52 ` [PATCH 17/18] mtd-cfi_cmdset_0020: Use common error handling code " SF Markus Elfring
2017-01-11 20:55 ` [PATCH 18/18] mtd-cfi_cmdset_0020: Add some spaces for better code readability SF Markus Elfring
2017-01-12 9:27 ` Dan Carpenter
2017-01-11 21:56 ` [PATCH 00/18] MTD-CFI: Fine-tuning for several function implementations Boris Brezillon
2017-01-11 21:58 ` Marek Vasut
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