linux-kernel - Re: [PATCH 2/2] Hwmon: f71882fg: use strict_stro(l|ul) instead of simple

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Message-ID: <4BA8A100.3000301@redhat.com>
Date:	Tue, 23 Mar 2010 12:07:44 +0100
From:	Hans de Goede <hdegoede@...hat.com>
To:	Jean Delvare <khali@...ux-fr.org>
CC:	Giel van Schijndel <me@...tis.eu>,
	Jonathan Cameron <jic23@....ac.uk>, lm-sensors@...sensors.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] Hwmon: f71882fg: use strict_stro(l|ul) instead of
  simple_strto$1

Hi,

On 03/23/2010 11:59 AM, Jean Delvare wrote:
> Hi Giel,
>
> On Mon, 22 Mar 2010 12:41:57 +0100, Giel van Schijndel wrote:
>> On Mon, Mar 22, 2010 at 11:23:08AM +0100, Jean Delvare wrote:
>>> On Sun, 21 Mar 2010 16:37:14 +0100, Giel van Schijndel wrote:
>>>> Use the strict_strol and strict_stroul functions instead of simple_strol
>>>> and simple_stroul respectively in sysfs functions.
>>>>
>>>> Signed-off-by: Giel van Schijndel<me@...tis.eu>
>>>> ---
>>>>   drivers/hwmon/f71882fg.c |   89 ++++++++++++++++++++++++++++++++++++++--------
>>>>   1 files changed, 74 insertions(+), 15 deletions(-)
>>>>
>>>> diff --git a/drivers/hwmon/f71882fg.c b/drivers/hwmon/f71882fg.c
>>>> index 21bc661..5c725a3 100644
>>>> --- a/drivers/hwmon/f71882fg.c
>>>> +++ b/drivers/hwmon/f71882fg.c
>>>> @@ -1128,7 +1128,10 @@ static ssize_t store_fan_full_speed(struct device *dev,
>>>>   {
>>>>   	struct f71882fg_data *data = dev_get_drvdata(dev);
>>>>   	int nr = to_sensor_dev_attr_2(devattr)->index;
>>>> -	long val = simple_strtol(buf, NULL, 10);
>>>> +	long val;
>>>> +
>>>> +	if (strict_strtol(buf, 10,&val) == -EINVAL)
>>>> +		return -EINVAL;
>>>
>>> That's not correct. You want to return an error if strict_strtol()
>>> returns _any_ error, not just -EINVAL. Maybe the current
>>> implementation can't return any other error code, but you should not
>>> assume this will always be the case in the future.
>>
>> Agreed. New patch follows this line:
>> ------------------------------------------------------------------------
>> Hwmon: f71882fg: use strict_stro(l|ul) instead of simple_strto$1
>>
>> Use the strict_strol and strict_stroul functions instead of simple_strol
>> and simple_stroul respectively in sysfs functions.
>>
>> Signed-off-by: Giel van Schijndel<me@...tis.eu>
>> ---
>>   drivers/hwmon/f71882fg.c |  133 ++++++++++++++++++++++++++++++++++++----------
>>   1 files changed, 104 insertions(+), 29 deletions(-)
>>
>> diff --git a/drivers/hwmon/f71882fg.c b/drivers/hwmon/f71882fg.c
>> index 21bc661..4230729 100644
>> --- a/drivers/hwmon/f71882fg.c
>> +++ b/drivers/hwmon/f71882fg.c
>> @@ -1127,8 +1127,12 @@ static ssize_t store_fan_full_speed(struct device *dev,
>>   				    const char *buf, size_t count)
>>   {
>>   	struct f71882fg_data *data = dev_get_drvdata(dev);
>> -	int nr = to_sensor_dev_attr_2(devattr)->index;
>> -	long val = simple_strtol(buf, NULL, 10);
>> +	int err, nr = to_sensor_dev_attr_2(devattr)->index;
>> +	long val;
>> +
>> +	err = strict_strtol(buf, 10,&val);
>> +	if (err)
>> +		return err;
>>
>>   	val = SENSORS_LIMIT(val, 23, 1500000);
>>   	val = fan_to_reg(val);
>> (...)
>
> Looks good to me this time. I'll apply this patch unless Hans objects.
>

No objections from me, IOW I'm still ack.

Regards,

Hans
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