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SubjectRe: [PATCH] watchdog: da9052: Fix invalid free of devm_ allocated data
On 11/26/2012 06:31 PM, Shubhrajyoti Datta wrote:
> On Thu, Nov 22, 2012 at 10:13 AM, Tushar Behera
> <tushar.behera@linaro.org> wrote:
>> It is not required to free devm_ allocated data. Since kref_put
>> needs a valid release function, da9052_wdt_release_resources()
>> is not deleted.
>>
>> Fixes following warning.
>> drivers/watchdog/da9052_wdt.c:59:1-6: WARNING: invalid free of
>> devm_ allocated data
>>
>> Signed-off-by: Tushar Behera <tushar.behera@linaro.org>
>> ---
>> drivers/watchdog/da9052_wdt.c | 4 ----
>> 1 files changed, 0 insertions(+), 4 deletions(-)
>>
>> diff --git a/drivers/watchdog/da9052_wdt.c b/drivers/watchdog/da9052_wdt.c
>> index f7abbae..20071de 100644
>> --- a/drivers/watchdog/da9052_wdt.c
>> +++ b/drivers/watchdog/da9052_wdt.c
>> @@ -53,10 +53,6 @@ static const struct {
>>
>> static void da9052_wdt_release_resources(struct kref *r)
>> {
>> - struct da9052_wdt_data *driver_data =
>> - container_of(r, struct da9052_wdt_data, kref);
>> -
>> - kfree(driver_data);
>
> However now the function will be empty right?
>
>

Yes, the function would be empty now. It is kept just to avoid the
run-time warning.

>> }
>>
>> static int da9052_wdt_set_timeout(struct watchdog_device *wdt_dev,
>> --
>> 1.7.4.1
>>
>> --
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--
Tushar Behera


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