On Thu, Sep 13, 2012 at 10:19 PM, Joe Perches <j...@perches.com> wrote:
> On Thu, 2012-09-13 at 21:49 +0200, Thomas Petazzoni wrote:
>> Instead of using a temporary buffer, snprintf() and kstrdup(), just
>> use kasprintf() that does the same thing in just oneline.
>>
>> Signed-off-by: Thomas Petazzoni <thomas.petazz...@free-electrons.com>
>> ---
>> drivers/pinctrl/pinmux.c | 5 +----
>> 1 file changed, 1 insertion(+), 4 deletions(-)
>>
>> diff --git a/drivers/pinctrl/pinmux.c b/drivers/pinctrl/pinmux.c
>> index 3d5ac73..9301a7a 100644
>> --- a/drivers/pinctrl/pinmux.c
>> +++ b/drivers/pinctrl/pinmux.c
>> @@ -232,14 +232,11 @@ int pinmux_request_gpio(struct pinctrl_dev *pctldev,
>> struct pinctrl_gpio_range *range,
>> unsigned pin, unsigned gpio)
>> {
>> - char gpiostr[16];
>> const char *owner;
>> int ret;
>>
>> /* Conjure some name stating what chip and pin this is taken by */
>> - snprintf(gpiostr, 15, "%s:%d", range->name, gpio);
>> -
>> - owner = kstrdup(gpiostr, GFP_KERNEL);
>> + owner = kasprintf(GFP_KERNEL, "%s:%d", range->name, gpio);
>> if (!owner)
>> return -EINVAL;
>>
>
> No not really. It's a bit different because the first
> snprintf is length limited but the kasprintf is not.
The one it's replacing is worse, it never sets gpiostr[15] to 0 and
kstrdup will read past the end of the buffer if the string is
truncated.
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