linux-kernel - Re: [PATCH] [media] ov2640: add support for async device registration

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Date:	Wed, 19 Mar 2014 17:17:08 +0800
From:	Josh Wu <josh.wu@...el.com>
To:	Sylwester Nawrocki <sylvester.nawrocki@...il.com>
CC:	<g.liakhovetski@....de>, <m.chehab@...sung.com>,
	<linux-media@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] [media] ov2640: add support for async device registration

Hi, Sylwester

Thanks for your review.

On 3/15/2014 5:17 AM, Sylwester Nawrocki wrote:
> Hi Josh,
>
> On 03/14/2014 11:12 AM, Josh Wu wrote:
>> +    clk = v4l2_clk_get(&client->dev, "mclk");
>> +    if (IS_ERR(clk))
>> +        return -EPROBE_DEFER;
>
> You should instead make it:
>
>         return PTR_ERR(clk);
>
> But you will need this patch for that to work:
> http://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git/commit/drivers/clk/clk.c?id=a34cd4666f3da84228a82f70c94b8d9b692034ea 
>
>
> With this patch there is no need to overwrite any returned error
> value with EPROBE_DEFER.

Thanks for the information. I will use this in v2 version.

Best Regards,
Josh Wu

>
>> @@ -1097,23 +1106,26 @@ static int ov2640_probe(struct i2c_client 
>> *client,
>>       v4l2_ctrl_new_std(&priv->hdl,&ov2640_ctrl_ops,
>>               V4L2_CID_HFLIP, 0, 1, 1, 0);
>>       priv->subdev.ctrl_handler =&priv->hdl;
>> -    if (priv->hdl.error)
>> -        return priv->hdl.error;
>> -
>> -    priv->clk = v4l2_clk_get(&client->dev, "mclk");
>> -    if (IS_ERR(priv->clk)) {
>> -        ret = PTR_ERR(priv->clk);
>> -        goto eclkget;
>
> -- 
> Regards,
> Sylwester

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