[PATCH 0/7] PM / devfreq: Add NoCP devfreq-event and support busfreq on exyno5422-odroidxu3
linux.amoon at gmail.com
Sun Apr 10 21:01:38 PDT 2016
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.
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