lkml.org 
[lkml]   [2019]   [Apr]   [16]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [PATCH v2 06/19] PM / devfreq: tegra: Fix missed error checking on devfreq initialization failure
From
Date
Hi,

On 19. 4. 16. 오후 11:29, Dmitry Osipenko wrote:
> 16.04.2019 5:32, Chanwoo Choi пишет:
>> Hi,
>>
>> patch6/7/8/9 are for handling of exception handling in probe() function.
>> Actually, I'm not sure that there are special reason to split out
>> the patches. I think that you can squash patch6/7/8/9 to only one patch.
>
> Indeed, I was rebasing and reordering patches multiple times and looks like there is no reason not to squash these patches now.
>
>> Also, even if patch6/7/8/9 handle the exception handling in probe(),
>> the tegra_devfreq_probe() doesn't support the restoring sequence
>> when fail happen. I think that if you want to fix the fail case of probe(),
>> please add the restoring sequence about following function.
>> - clk_disable_unprepare()
>> - clk_notifier_unregister()
>> - dev_pm_opp_remove()
>
> When all of 6/7/8/9 patches are applied, the clk_notifier_register() becomes the last invocation of the probe function and clk_enable() is kept at the first place of the probe order. Hence the sequence you're suggesting is already incorrect because error-unwinding order usually should be opposite to the probe order. It looks to me that the current final result of these patches is already correct.

You're right. When I replied it, I have not considered the order.
Sorry, it made you some confusion.

>
>


--
Best Regards,
Chanwoo Choi
Samsung Electronics

\
 
 \ /
  Last update: 2019-04-17 03:00    [W:0.058 / U:81.404 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site