[PATCH 0/7] PM / devfreq: Add NoCP devfreq-event and support busfreq on exyno5422-odroidxu3
cw00.choi at samsung.com
Sun Apr 10 21:03:59 PDT 2016
On 2016년 04월 11일 13:01, Anand Moon wrote:
> Hi Chanwoo,
> On 11 April 2016 at 07:46, Chanwoo Choi <cw00.choi at samsung.com> wrote:
>> Hi Anand,
>> On 2016년 04월 09일 03:24, Chanwoo Choi wrote:
>>> Hi Anand,
>>> On Sat, Apr 9, 2016 at 3:11 AM, Anand Moon <linux.amoon at gmail.com> wrote:
>>>> Hi Chanwoo,
>>>> I am observing following deadlock. Both on Odroid U3 and Odroid XU4.
>>> Thanks for your test. I'll test it again and fix it.
>> This possible recursive locking is fixed with following diff:
>> Thanks for your report. I'll fix it on next patchset (v9).
>>  https://lkml.org/lkml/2016/4/8/14
>> diff --git a/drivers/devfreq/governor_passive.c b/drivers/devfreq/governor_passive.c
>> index 28a9ae32d330..a4b0b02ee797 100644
>> --- a/drivers/devfreq/governor_passive.c
>> +++ b/drivers/devfreq/governor_passive.c
>> @@ -102,7 +102,7 @@ static int update_devfreq_passive(struct devfreq *devfreq, unsigned long freq)
>> if (!devfreq->governor)
>> return -EINVAL;
>> - mutex_lock(&devfreq->lock);
>> + mutex_lock_nested(&devfreq->lock, SINGLE_DEPTH_NESTING);
>> ret = devfreq->governor->get_target_freq(devfreq, &freq);
>> if (ret < 0)
>> Best Regards,
>> Chanwoo Choi
> Thanks you for these patches on devfreq.
> These changes fix the warning.
> Tested-by: Anand Moon <linux.amoon at gmail.com>
> Tested on Odroid XU4 and Odroid U3.
Thanks for your test and report.
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