linux-kernel - Re: [v2 05/24] clk: mediatek: Fix resource leak in mtk_clk_simple_probe

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Date:   Mon, 23 Aug 2021 14:42:42 +0800
From:   Chen-Yu Tsai <wenst@...omium.org>
To:     Chun-Jie Chen <chun-jie.chen@...iatek.com>
Cc:     Matthias Brugger <matthias.bgg@...il.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Nicolas Boichat <drinkcat@...omium.org>,
        Rob Herring <robh+dt@...nel.org>,
        "moderated list:ARM/FREESCALE IMX / MXC ARM ARCHITECTURE" 
        <linux-arm-kernel@...ts.infradead.org>,
        LKML <linux-kernel@...r.kernel.org>,
        "moderated list:ARM/Mediatek SoC support" 
        <linux-mediatek@...ts.infradead.org>, linux-clk@...r.kernel.org,
        Devicetree List <devicetree@...r.kernel.org>,
        srv_heupstream <srv_heupstream@...iatek.com>,
        Project_Global_Chrome_Upstream_Group 
        <Project_Global_Chrome_Upstream_Group@...iatek.com>
Subject: Re: [v2 05/24] clk: mediatek: Fix resource leak in mtk_clk_simple_probe

On Fri, Aug 20, 2021 at 7:19 PM Chun-Jie Chen
<chun-jie.chen@...iatek.com> wrote:
>
> Release clock data when clock driver probe fail to fix
> possible resource leak.
>
> Signed-off-by: Chun-Jie Chen <chun-jie.chen@...iatek.com>

Reviewed-by: Chen-Yu Tsai <wenst@...omium.org>

> ---
>  drivers/clk/mediatek/clk-mtk.c | 12 ++++++++++--
>  1 file changed, 10 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/clk/mediatek/clk-mtk.c b/drivers/clk/mediatek/clk-mtk.c
> index c3d385c0cfcb..74890759e98c 100644
> --- a/drivers/clk/mediatek/clk-mtk.c
> +++ b/drivers/clk/mediatek/clk-mtk.c
> @@ -314,7 +314,15 @@ int mtk_clk_simple_probe(struct platform_device *pdev)
>
>         r = mtk_clk_register_gates(node, mcd->clks, mcd->num_clks, clk_data);

Note for future reference: there is no unregister counterpart for
mtk_clk_register_*.

>         if (r)
> -               return r;
> +               goto free_data;
>
> -       return of_clk_add_provider(node, of_clk_src_onecell_get, clk_data);
> +       r = of_clk_add_provider(node, of_clk_src_onecell_get, clk_data);
> +       if (r)
> +               goto free_data;
> +
> +       return r;
> +
> +free_data:
> +       mtk_free_clk_data(clk_data);
> +       return r;
>  }
> --
> 2.18.0
> _______________________________________________
> Linux-mediatek mailing list
> Linux-mediatek@...ts.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-mediatek

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