linux-kernel - Re: [PATCH] PM / devfreq: fix odd_ptr

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Date:   Fri, 22 May 2020 14:59:22 +0200 (CEST)
From:   Julia Lawall <julia.lawall@...ia.fr>
To:     kbuild-all@...ts.01.org,
        "Andrew-sh.Cheng" <andrew-sh.cheng@...iatek.com>,
        MyungJoo Ham <myungjoo.ham@...sung.com>,
        Kyungmin Park <kyungmin.park@...sung.com>,
        Chanwoo Choi <cw00.choi@...sung.com>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        "Rafael J . Wysocki" <rjw@...ysocki.net>,
        Viresh Kumar <viresh.kumar@...aro.org>,
        Nishanth Menon <nm@...com>, Stephen Boyd <sboyd@...nel.org>,
        Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>, devicetree@...r.kernel.org,
        "Andrew-sh . Cheng" <andrew-sh.cheng@...iatek.com>,
        srv_heupstream@...iatek.com, linux-pm@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Saravana Kannan <skannan@...eaurora.org>,
        linux-mediatek@...ts.infradead.org,
        Sibi Sankar <sibis@...eaurora.org>,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH] PM / devfreq: fix odd_ptr_err.cocci warnings

Hello,

This provides a patch, but it doesn't look like the right one.  It looks
like the if test should be testing opp_table,

julia

On Fri, 22 May 2020, kbuild test robot wrote:

> From: kbuild test robot <lkp@...el.com>
>
> drivers/devfreq/governor_passive.c:336:7-13: inconsistent IS_ERR and PTR_ERR on line 337.
>
>  PTR_ERR should access the value just tested by IS_ERR
>
> Semantic patch information:
>  There can be false positives in the patch case, where it is the call to
>  IS_ERR that is wrong.
>
> Generated by: scripts/coccinelle/tests/odd_ptr_err.cocci
>
> CC: Saravana Kannan <skannan@...eaurora.org>
> Signed-off-by: kbuild test robot <lkp@...el.com>
> ---
>
> url:    https://github.com/0day-ci/linux/commits/Andrew-sh-Cheng/Add-cpufreq-and-cci-devfreq-for-mt8183-and-SVS-support/20200520-222709
> base:   https://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm.git linux-next
> :::::: branch date: 26 hours ago
> :::::: commit date: 26 hours ago
>
> Please take the patch only if it's a positive warning. Thanks!
>
>  governor_passive.c |    2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> --- a/drivers/devfreq/governor_passive.c
> +++ b/drivers/devfreq/governor_passive.c
> @@ -334,7 +334,7 @@ static int cpufreq_passive_register(stru
>
>  			opp_table = dev_pm_opp_get_opp_table(cpu_dev);
>  			if (IS_ERR(devfreq->opp_table)) {
> -				ret = PTR_ERR(opp_table);
> +				ret = PTR_ERR(devfreq->opp_table);
>  				goto out;
>  			}
>
>