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SubjectRe: [PATCH] clocksource: cadence_ttc: fix memory leak in ttc_setup_clockevent
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On 2019/3/9 22:24, Daniel Lezcano wrote:
>
> Hi Yue,
>
> I appreciate the fix but usually we add a rollback for all the
> operations done in the init function.
>
> Please, migrate the init function to the timer-of API, so the rollback
> will be automatically handled.
>
> Example here:
>
> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/clocksource/timer-sprd.c#n197

It seems complicated for me,

ttc_setup_clocksource and ttc_setup_clockevent use a different of_clk,
hard to use timer_of_init to do a initialization.

I'm not familiar with this. Maybe someone else can do this?

>
> On 09/03/2019 14:19, Yue Haibing wrote:
>> From: YueHaibing <yuehaibing@huawei.com>
>>
>> Add the missing kfree() in ttc_setup_clockevent() to free the
>> mem before error return.
>>
>> Fixes: 70504f311d4b ("clocksource/drivers/cadence_ttc: Convert init function to return error")
>> Signed-off-by: YueHaibing <yuehaibing@huawei.com>
>> ---
>> drivers/clocksource/timer-cadence-ttc.c | 1 +
>> 1 file changed, 1 insertion(+)
>>
>> diff --git a/drivers/clocksource/timer-cadence-ttc.c b/drivers/clocksource/timer-cadence-ttc.c
>> index b334029..b664af8 100644
>> --- a/drivers/clocksource/timer-cadence-ttc.c
>> +++ b/drivers/clocksource/timer-cadence-ttc.c
>> @@ -432,6 +432,7 @@ static int __init ttc_setup_clockevent(struct clk *clk,
>> &ttcce->ttc.clk_rate_change_nb);
>> if (err) {
>> pr_warn("Unable to register clock notifier.\n");
>> + kfree(ttcce);
>> return err;
>> }
>>
>>
>
>

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