[PATCH] ASoC: samsung: i2s: Check before clk_unregister() not needed
Christophe JAILLET
christophe.jaillet at wanadoo.fr
Fri Jun 10 18:15:25 CEST 2022
Le 29/05/2022 à 10:06, Krzysztof Kozlowski a écrit :
> On 27/05/2022 08:54, Yihao Han wrote:
>> clk_unregister() already checks the clk ptr using
>> !clk || WARN_ON_ONCE(IS_ERR(clk)) so there is no need to check it
>> again before calling it.
>>
>
> No, this explanation does not make sense. clk_unregister() warns and
> this code is not equivalent.
>
>
>
> Best regards,
> Krzysztof
>
Hi,
Moreover, as pointed out by greg in [1] on some plateform the assertion
in the commit description is wrong. His message is about clk_disable()
but, IIUC, it makes sense for clk_unregister() as well. See [2] on the
sh plateform.
CJ
[1]: https://lore.kernel.org/all/YqMIUOTU%2Fk5XpW3I@kroah.com/
[2]:
https://elixir.bootlin.com/linux/v5.18.3/source/drivers/sh/clk/core.c#L452
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