netdev - RE: [patch 4/4] s390/net: fix format string mismatches

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Date:	Tue, 27 May 2014 09:34:20 +0000
From:	David Laight <David.Laight@...LAB.COM>
To:	"'frank.blaschka@...ibm.com'" <frank.blaschka@...ibm.com>,
	"davem@...emloft.net" <davem@...emloft.net>
CC:	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	"linux-s390@...r.kernel.org" <linux-s390@...r.kernel.org>,
	Ursula Braun <ursula.braun@...ibm.com>,
	Toralf Foerster <toralf.foerster@....de>
Subject: RE: [patch 4/4] s390/net: fix format string mismatches

From: frank.blaschka@...ibm.com
> From: Ursula Braun <ursula.braun@...ibm.com>
> 
> cppcheck blamed some issues in drivers/s390/net/...
> They are fixed here.
...
> diff --git a/drivers/s390/net/ctcm_sysfs.c b/drivers/s390/net/ctcm_sysfs.c
> index 985b5dc..883f713 100644
> --- a/drivers/s390/net/ctcm_sysfs.c
> +++ b/drivers/s390/net/ctcm_sysfs.c
> @@ -34,8 +34,9 @@ static ssize_t ctcm_buffer_write(struct device *dev,
>  		struct device_attribute *attr, const char *buf, size_t count)
>  {
>  	struct net_device *ndev;
> -	int bs1;
> +	unsigned int bs1;
>  	struct ctcm_priv *priv = dev_get_drvdata(dev);
> +	int rc;
> 
>  	ndev = priv->channel[CTCM_READ]->netdev;
>  	if (!(priv && priv->channel[CTCM_READ] && ndev)) {
> @@ -43,7 +44,9 @@ static ssize_t ctcm_buffer_write(struct device *dev,
>  		return -ENODEV;
>  	}
> 
> -	sscanf(buf, "%u", &bs1);
> +	rc =  sscanf(buf, "%u", &bs1);

There is a spare ' ' here.
I'd have thought that there is a strtoul() function that gives
much clearer error detection than sscanf().

> +	if (rc != 1)
> +					goto einval;

and something odd with the indentation here.
and some tab/space fubar later on...

	David