linux-kernel - Re: [PATCH] opp: Fix early exit from dev_pm_opp_register_set_opp

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Date:   Tue, 20 Oct 2020 16:49:27 +0530
From:   Naresh Kamboju <naresh.kamboju@...aro.org>
To:     Viresh Kumar <viresh.kumar@...aro.org>
Cc:     Rafael Wysocki <rjw@...ysocki.net>,
        Viresh Kumar <vireshk@...nel.org>, Nishanth Menon <nm@...com>,
        Stephen Boyd <sboyd@...nel.org>,
        Ulf Hansson <ulf.hansson@...aro.org>,
        Stephan Gerhold <stephan@...hold.net>,
        Krzysztof Kozlowski <krzk@...nel.org>,
        Linux PM <linux-pm@...r.kernel.org>,
        Vincent Guittot <vincent.guittot@...aro.org>,
        Naresh Kamboju <naresh.kamboju@...aro.com>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] opp: Fix early exit from dev_pm_opp_register_set_opp_helper()

Thanks for the fix patch.

On Tue, 20 Oct 2020 at 16:03, Viresh Kumar <viresh.kumar@...aro.org> wrote:
>
> We returned earlier by mistake even when there were no failures. Fix it.
>
> Fixes: dd461cd9183f ("opp: Allow dev_pm_opp_get_opp_table() to return -EPROBE_DEFER")
> Reported-by: Naresh Kamboju <naresh.kamboju@...aro.com>
> Signed-off-by: Viresh Kumar <viresh.kumar@...aro.org>

Tested-by: Naresh Kamboju <naresh.kamboju@...aro.com>

> ---
> Rafael: Please pick up this one as well for 5.10-rc1/2 once Naresh gives
> his tested by. Thanks.
>

This patch applied on linus mainline master branch and the reported problem
on another email thread [1] has been resolved.
Test log showing arm device TI x15 boot pass [2].

>  drivers/opp/core.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/opp/core.c b/drivers/opp/core.c
> index 2483e765318a..4ac4e7ce6b8b 100644
> --- a/drivers/opp/core.c
> +++ b/drivers/opp/core.c
> @@ -1930,7 +1930,7 @@ struct opp_table *dev_pm_opp_register_set_opp_helper(struct device *dev,
>                 return ERR_PTR(-EINVAL);
>
>         opp_table = dev_pm_opp_get_opp_table(dev);
> -       if (!IS_ERR(opp_table))
> +       if (IS_ERR(opp_table))
>                 return opp_table;
>
>         /* This should be called before OPPs are initialized */
> --
> 2.25.0.rc1.19.g042ed3e048af
>

[1] https://lore.kernel.org/linux-next/20201020103617.qramu2ejlp44qxcz@vireshk-i7/T/#m21db3fcc53dc9a5833797fc1ddbc3c58b576b13b
[2] https://lkft.validation.linaro.org/scheduler/job/1863591#L1884


- Naresh