[lkml]   [2020]   [Jun]   [29]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [PATCH v2] PM / devfreq: rk3399_dmc: Fix kernel oops when rockchip,pmu is absent
Hi Marc,
Hi Marc,

On 6/29/20 10:22 PM, Marc Zyngier wrote:
> On 2020-06-29 12:29, Chanwoo Choi wrote:
>> Hi Enric and Mark,
>> On 6/29/20 8:05 PM, Enric Balletbo i Serra wrote:
>>> Hi Chanwoo and Marc,
>>> On 29/6/20 13:09, Chanwoo Choi wrote:
>>>> Hi Enric,
>>>> Could you check this issue? Your patch[1] causes this issue.
>>>> As Marc mentioned, although rk3399-dmc.c handled 'rockchip,pmu'
>>>> as the mandatory property, your patch[1] didn't add the 'rockchip,pmu'
>>>> property to the documentation.
>>> I think the problem is that the DT binding patch, for some reason, was missed
>>> and didn't land. The patch seems to have all the required reviews and acks.
>>> Sorry because I didn't notice this issue when 9173c5ceb035 landed. And thanks
>>> for fixing the issue.
>> If the 'rockchip,pmu' propery is mandatory, instead of Mark's patch,
>> we better to require the merge of patch[1] to DT maintainer.
> It is way too late. Firmware exists (mainline u-boot, for one) that
> do not expose the new property, and you can't demand that people
> upgrade. This is an ABI bug, and we now have to live with it.

As you commented, it is proper that rk3399-dmc.c treats 'rockchip,pmu'
property as optional. Could you send v3 with edited patch descritpion
and adding stable mailing list to Cc?

> So, yes to fixing the DT, and no to *only* fixing the DT.

Best Regards,
Chanwoo Choi
Samsung Electronics

 \ /
  Last update: 2020-06-30 02:39    [W:0.101 / U:1.148 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site