linux-kernel - Re: [PATCH v2] acpi: Use kstrtoul() instead of strtoul()/simple

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Message-ID: <55BDD287.70004@roeck-us.net>
Date:	Sun, 02 Aug 2015 01:19:19 -0700
From:	Guenter Roeck <linux@...ck-us.net>
To:	Pavel Machek <pavel@....cz>
CC:	rjw@...ysocki.net, lenb@...nel.org, robert.moore@...el.com,
	lv.zheng@...el.com, linux-acpi@...r.kernel.org,
	linux-kernel@...r.kernel.org, devel@...ica.org
Subject: Re: [PATCH v2] acpi: Use kstrtoul() instead of strtoul()/simple_strtoul()

On 08/02/2015 12:16 AM, Pavel Machek wrote:
> On Mon 2015-07-27 17:32:22, Guenter Roeck wrote:
>> simple_strtoul() is deprecated; replace with kstrtoul() and kstrtouint().
>> Return an error if the value passed to the sysfs attribute is not
>> a number.
>>
>> Drop the definition of strtoul() since it is no longer needed.
>>
>> Signed-off-by: Guenter Roeck <linux@...ck-us.net>
>> ---
>> v2: An additional use of strtoul() was introduced with commit 4fa4616e.
>>      Replace it as well.
>>
>>   drivers/acpi/acpica/evgpeinit.c | 5 +++--
>>   drivers/acpi/sysfs.c            | 8 ++++++--
>>   include/acpi/platform/aclinux.h | 1 -
>>   3 files changed, 9 insertions(+), 5 deletions(-)
>>
>> diff --git a/drivers/acpi/acpica/evgpeinit.c b/drivers/acpi/acpica/evgpeinit.c
>> index ea4c0d3fca2d..aa1e8c1f2d4a 100644
>> --- a/drivers/acpi/acpica/evgpeinit.c
>> +++ b/drivers/acpi/acpica/evgpeinit.c
>> @@ -326,6 +326,7 @@ acpi_ev_match_gpe_method(acpi_handle obj_handle,
>>   	u32 gpe_number;
>>   	char name[ACPI_NAME_SIZE + 1];
>>   	u8 type;
>> +	int err;
>>
>>   	ACPI_FUNCTION_TRACE(ev_match_gpe_method);
>>
>> @@ -377,8 +378,8 @@ acpi_ev_match_gpe_method(acpi_handle obj_handle,
>>
>>   	/* 4) The last two characters of the name are the hex GPE Number */
>>
>> -	gpe_number = strtoul(&name[2], NULL, 16);
>> -	if (gpe_number == ACPI_UINT32_MAX) {
>> +	er = kstrtouint(&name[2], 16, &gpe_number);
>> +	if (err < 0 || gpe_number == ACPI_UINT32_MAX) {
>
> Are you sure you compile-tested this?
>

I was, but maybe not ;-). Since the patch was rejected it does not really matter.

Guenter

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