linux-kernel - Re: [PATCH 2/2] mfd: smsc-ece1099: Improve a size determination in smsc_i2c

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Date:   Tue, 23 Jan 2018 09:50:59 +0000
From:   Lee Jones <lee.jones@...aro.org>
To:     SF Markus Elfring <elfring@...rs.sourceforge.net>
Cc:     kernel-janitors@...r.kernel.org,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 2/2] mfd: smsc-ece1099: Improve a size determination in
 smsc_i2c_probe()

On Tue, 16 Jan 2018, SF Markus Elfring wrote:

> From: Markus Elfring <elfring@...rs.sourceforge.net>
> Date: Tue, 16 Jan 2018 08:58:26 +0100
> 
> Replace the specification of a data structure by a pointer dereference
> as the parameter for the operator "sizeof" to make the corresponding size
> determination a bit safer according to the Linux coding style convention.
> 
> This issue was detected by using the Coccinelle software.
> 
> Signed-off-by: Markus Elfring <elfring@...rs.sourceforge.net>
> ---
>  drivers/mfd/smsc-ece1099.c | 4 +---
>  1 file changed, 1 insertion(+), 3 deletions(-)
> 
> diff --git a/drivers/mfd/smsc-ece1099.c b/drivers/mfd/smsc-ece1099.c
> index b9d96651cc0d..6681205dd2c0 100644
> --- a/drivers/mfd/smsc-ece1099.c
> +++ b/drivers/mfd/smsc-ece1099.c
> @@ -33,12 +33,10 @@ static const struct regmap_config smsc_regmap_config = {
>  static int smsc_i2c_probe(struct i2c_client *i2c,
>  			const struct i2c_device_id *id)
>  {
> -	struct smsc *smsc;
>  	int devid, rev, venid_l, venid_h;
>  	int ret;
> +	struct smsc *smsc = devm_kzalloc(&i2c->dev, sizeof(*smsc), GFP_KERNEL);

Please keep these separate.

> -	smsc = devm_kzalloc(&i2c->dev, sizeof(struct smsc),
> -				GFP_KERNEL);
>  	if (!smsc)
>  		return -ENOMEM;
>  

-- 
Lee Jones
Linaro Services Technical Lead
Linaro.org │ Open source software for ARM SoCs
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