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 22:47:31 +0100
From:   Matthias Brugger <matthias.bgg@...il.com>
To:     Hans Verkuil <hverkuil@...all.nl>, 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>,
        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



On 24/02/2020 18:36, Hans Verkuil wrote:
> 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?
> 

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)
>>
>