linux-kernel - Re: [PATCH v7 06/13] media: mtk-mdp: Check return value of of_clk

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Date:   Mon, 24 Feb 2020 18:36:28 +0100
From:   Hans Verkuil <hverkuil@...all.nl>
To:     matthias.bgg@...nel.org, robh+dt@...nel.org, mark.rutland@....com,
        ck.hu@...iatek.com, p.zabel@...gutronix.de, airlied@...ux.ie,
        mturquette@...libre.com, sboyd@...nel.org,
        ulrich.hecht+renesas@...il.com, laurent.pinchart@...asonboard.com,
        enric.balletbo@...labora.com
Cc:     devicetree@...r.kernel.org, drinkcat@...omium.org,
        frank-w@...lic-files.de, sean.wang@...iatek.com,
        linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        wens@...e.org, linux-mediatek@...ts.infradead.org,
        rdunlap@...radead.org, hsinyi@...omium.org,
        linux-clk@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-media@...r.kernel.org, Matthias Brugger <mbrugger@...e.com>,
        Andrew-CT Chen <andrew-ct.chen@...iatek.com>,
        Houlong Wei <houlong.wei@...iatek.com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Minghsiu Tsai <minghsiu.tsai@...iatek.com>
Subject: Re: [PATCH v7 06/13] media: mtk-mdp: Check return value of of_clk_get

Hi Matthias,

On 2/13/20 9:19 PM, matthias.bgg@...nel.org wrote:
> From: Matthias Brugger <mbrugger@...e.com>
> 
> Check the return value of of_clk_get and print an error
> message if not EPROBE_DEFER.
> 
> Signed-off-by: Matthias Brugger <mbrugger@...e.com>

This patch is independent from the remainder of this series, right?
It looks good to me, so is it OK if I merge this in the media subsystem?

Regards,

	Hans

> 
> ---
> 
> Changes in v7:
> - fix check of return value of of_clk_get
> - fix identation
> 
> Changes in v6: None
> Changes in v5: None
> Changes in v4: None
> Changes in v3: None
> Changes in v2: None
> 
>  drivers/media/platform/mtk-mdp/mtk_mdp_comp.c | 6 ++++++
>  1 file changed, 6 insertions(+)
> 
> diff --git a/drivers/media/platform/mtk-mdp/mtk_mdp_comp.c b/drivers/media/platform/mtk-mdp/mtk_mdp_comp.c
> index 0c4788af78dd..58abfbdfb82d 100644
> --- a/drivers/media/platform/mtk-mdp/mtk_mdp_comp.c
> +++ b/drivers/media/platform/mtk-mdp/mtk_mdp_comp.c
> @@ -110,6 +110,12 @@ int mtk_mdp_comp_init(struct device *dev, struct device_node *node,
>  
>  	for (i = 0; i < ARRAY_SIZE(comp->clk); i++) {
>  		comp->clk[i] = of_clk_get(node, i);
> +		if (IS_ERR(comp->clk[i])) {
> +			if (PTR_ERR(comp->clk[i]) != -EPROBE_DEFER)
> +				dev_err(dev, "Failed to get clock\n");
> +
> +			return PTR_ERR(comp->clk[i]);
> +		}
>  
>  		/* Only RDMA needs two clocks */
>  		if (comp->type != MTK_MDP_RDMA)
>