diff mbox

[8/8] mmc-core: Use kmalloc_array() in mmc_alloc_sg()

Message ID a2c80b39-6f7e-81ad-01d2-fce831e6cd8c@users.sourceforge.net (mailing list archive)
State New, archived
Headers show

Commit Message

SF Markus Elfring Jan. 8, 2017, 9:55 p.m. UTC 
From: Markus Elfring <elfring@users.sourceforge.net>
Date: Sun, 8 Jan 2017 22:10:40 +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/mmc/core/queue.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Comments

Linus Walleij Jan. 9, 2017, 6:37 p.m. UTC | #1 
On Sun, Jan 8, 2017 at 10:55 PM, SF Markus Elfring
<elfring@users.sourceforge.net> wrote:

> From: Markus Elfring <elfring@users.sourceforge.net>
> Date: Sun, 8 Jan 2017 22:10:40 +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>

Reviewed-by: Linus Walleij <linus.walleij@linaro.org>

Yours,
Linus Walleij
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Shawn Lin Jan. 10, 2017, 8:27 a.m. UTC | #2 
On 2017/1/9 5:55, SF Markus Elfring wrote:
> From: Markus Elfring <elfring@users.sourceforge.net>
> Date: Sun, 8 Jan 2017 22:10:40 +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.
>

Reviewed-by: Shawn Lin <shawn.lin@rock-chips.com>

> Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
> ---
>  drivers/mmc/core/queue.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/mmc/core/queue.c b/drivers/mmc/core/queue.c
> index a6496d8027bc..b1986622c60e 100644
> --- a/drivers/mmc/core/queue.c
> +++ b/drivers/mmc/core/queue.c
> @@ -152,7 +152,7 @@ static struct scatterlist *mmc_alloc_sg(int sg_len, int *err)
>  {
>  	struct scatterlist *sg;
>
> -	sg = kmalloc(sizeof(struct scatterlist)*sg_len, GFP_KERNEL);
> +	sg = kmalloc_array(sg_len, sizeof(*sg), GFP_KERNEL);
>  	if (!sg)
>  		*err = -ENOMEM;
>  	else {
>
diff mbox

Patch

diff --git a/drivers/mmc/core/queue.c b/drivers/mmc/core/queue.c
index a6496d8027bc..b1986622c60e 100644
--- a/drivers/mmc/core/queue.c
+++ b/drivers/mmc/core/queue.c
@@ -152,7 +152,7 @@  static struct scatterlist *mmc_alloc_sg(int sg_len, int *err)
 {
 	struct scatterlist *sg;
 
-	sg = kmalloc(sizeof(struct scatterlist)*sg_len, GFP_KERNEL);
+	sg = kmalloc_array(sg_len, sizeof(*sg), GFP_KERNEL);
 	if (!sg)
 		*err = -ENOMEM;
 	else {