linux-kernel - Re: [PATCH] opp: fix bad error check logic in the opp helper register

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Message-ID: <20201028145405.ucfepzt6xoxro6fi@vireshk-i7>
Date:   Wed, 28 Oct 2020 20:24:05 +0530
From:   Viresh Kumar <viresh.kumar@...aro.org>
To:     Tero Kristo <t-kristo@...com>
Cc:     vireshk@...nel.org, nm@...com, sboyd@...nel.org,
        linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] opp: fix bad error check logic in the opp helper register

On 28-10-20, 16:13, Tero Kristo wrote:
> The error check is incorrectly negated causing the helper to never
> register anything. This causes platforms that depend on this
> functionality to fail always with any cpufreq transition, and at least
> TI DRA7 based platforms fail to boot completely due to warning message
> flood from _generic_set_opp_regulator complaining about multiple
> regulators not being supported.
> 
> Fixes: dd461cd9183f ("opp: Allow dev_pm_opp_get_opp_table() to return -EPROBE_DEFER")
> Signed-off-by: Tero Kristo <t-kristo@...com>
> ---
>  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 */

A similar fix is already pushed in linux-next for this.

-- 
viresh