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Subject: Re: [PATCH v7 06/13] media: mtk-mdp: Check return value of of_clk_get
To:     Hans Verkuil <hverkuil@xs4all.nl>, matthias.bgg@kernel.org,
        robh+dt@kernel.org, mark.rutland@arm.com, ck.hu@mediatek.com,
        p.zabel@pengutronix.de, airlied@linux.ie, mturquette@baylibre.com,
        sboyd@kernel.org, ulrich.hecht+renesas@gmail.com,
        laurent.pinchart@ideasonboard.com, enric.balletbo@collabora.com
Cc:     devicetree@vger.kernel.org, drinkcat@chromium.org,
        frank-w@public-files.de, sean.wang@mediatek.com,
        linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org,
        wens@csie.org, linux-mediatek@lists.infradead.org,
        rdunlap@infradead.org, hsinyi@chromium.org,
        linux-clk@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
        linux-media@vger.kernel.org, Matthias Brugger <mbrugger@suse.com>,
        Andrew-CT Chen <andrew-ct.chen@mediatek.com>,
        Houlong Wei <houlong.wei@mediatek.com>,
        Mauro Carvalho Chehab <mchehab@kernel.org>,
        Minghsiu Tsai <minghsiu.tsai@mediatek.com>
References: <20200213201953.15268-1-matthias.bgg@kernel.org>
 <20200213201953.15268-7-matthias.bgg@kernel.org>
 <9d39ba53-482e-ba8f-2699-c34540a3dfd0@xs4all.nl>
From:   Matthias Brugger <matthias.bgg@gmail.com>
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Message-ID: <1c75d9ef-555a-7a07-b17a-c985605a16bc@gmail.com>
Date:   Mon, 24 Feb 2020 22:47:31 +0100
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On 24/02/2020 18:36, Hans Verkuil wrote:
> Hi Matthias,
> 
> On 2/13/20 9:19 PM, matthias.bgg@kernel.org wrote:
>> From: Matthias Brugger <mbrugger@suse.com>
>>
>> Check the return value of of_clk_get and print an error
>> message if not EPROBE_DEFER.
>>
>> Signed-off-by: Matthias Brugger <mbrugger@suse.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?
> 

Yes it is independent. Please merge it to the media subsystem.

Thanks,
Matthias

> 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)
>>
>