linux-kernel - Re: [PATCH 1/2] drm/panfrost: missing remove opp table in case of failure

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <694c3bd0-1588-ed28-d282-8e83fc6a06f5@arm.com>
Date:   Mon, 13 Apr 2020 14:07:36 +0100
From:   Steven Price <steven.price@....com>
To:     Clément Péron <peron.clem@...il.com>,
        Rob Herring <robh@...nel.org>,
        Tomeu Vizoso <tomeu.vizoso@...labora.com>,
        Alyssa Rosenzweig <alyssa.rosenzweig@...labora.com>,
        Viresh Kumar <vireshk@...nel.org>, Nishanth Menon <nm@...com>,
        Stephen Boyd <sboyd@...nel.org>
Cc:     dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] drm/panfrost: missing remove opp table in case of
 failure

On 11/04/2020 21:06, Clément Péron wrote:
> In case of failure we need to remove OPP table.
> 
> Use Linux classic error handling with goto usage.
> 
> Signed-off-by: Clément Péron <peron.clem@...il.com>

Reviewed-by: Steven Price <steven.price@....com>

> ---
>   drivers/gpu/drm/panfrost/panfrost_devfreq.c | 16 ++++++++++++----
>   1 file changed, 12 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/gpu/drm/panfrost/panfrost_devfreq.c b/drivers/gpu/drm/panfrost/panfrost_devfreq.c
> index 413987038fbf..62541f4edd81 100644
> --- a/drivers/gpu/drm/panfrost/panfrost_devfreq.c
> +++ b/drivers/gpu/drm/panfrost/panfrost_devfreq.c
> @@ -90,8 +90,11 @@ int panfrost_devfreq_init(struct panfrost_device *pfdev)
>   	cur_freq = clk_get_rate(pfdev->clock);
>   
>   	opp = devfreq_recommended_opp(dev, &cur_freq, 0);
> -	if (IS_ERR(opp))
> -		return PTR_ERR(opp);
> +	if (IS_ERR(opp)) {
> +		DRM_DEV_ERROR(dev, "Failed to set recommended OPP\n");
> +		ret = PTR_ERR(opp);
> +		goto err_opp;
> +	}
>   
>   	panfrost_devfreq_profile.initial_freq = cur_freq;
>   	dev_pm_opp_put(opp);
> @@ -100,8 +103,8 @@ int panfrost_devfreq_init(struct panfrost_device *pfdev)
>   					  DEVFREQ_GOV_SIMPLE_ONDEMAND, NULL);
>   	if (IS_ERR(devfreq)) {
>   		DRM_DEV_ERROR(dev, "Couldn't initialize GPU devfreq\n");
> -		dev_pm_opp_of_remove_table(dev);
> -		return PTR_ERR(devfreq);
> +		ret = PTR_ERR(devfreq);
> +		goto err_opp;
>   	}
>   	pfdev->devfreq.devfreq = devfreq;
>   
> @@ -112,6 +115,11 @@ int panfrost_devfreq_init(struct panfrost_device *pfdev)
>   		pfdev->devfreq.cooling = cooling;
>   
>   	return 0;
> +
> +err_opp:
> +	dev_pm_opp_of_remove_table(dev);
> +
> +	return ret;
>   }
>   
>   void panfrost_devfreq_fini(struct panfrost_device *pfdev)
>