Re: [PATCH v2 06/19] PM / devfreq: tegra: Fix missed error checking on devfreq initialization failure

[Chanwoo Choi]

Hi,

On 19. 4. 16. ìí 11:29, Dmitry Osipenko wrote:
> 16.04.2019 5:32, Chanwoo Choi ÐÐÑÐÑ:
>> 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