linux-kernel - Re: [PATCH] ASoC: max98090 not need to return fail if fail to request hpdet irq.

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Date:	Wed, 30 Jul 2014 09:29:27 +0300
From:	Jarkko Nikula <jarkko.nikula@...ux.intel.com>
To:	jianqun <xjq@...k-chips.com>, broonie@...nel.org,
	lgirdwood@...il.com, perex@...ex.cz, tiwai@...e.de,
	tbleung@...omium.org, dgreid@...omium.org,
	kevin.strasser@...el.com, swarren@...dia.com,
	ralph.birt@...imintegrated.com
CC:	heiko@...ech.de, alsa-devel@...a-project.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] ASoC: max98090 not need to return fail if fail to request
 hpdet irq.

On 07/30/2014 04:50 AM, jianqun wrote:
> From: xujianqun <xjq@...k-chips.com>
>
> Since hardware may not MUST to use IRQ pin of max98090 as jack detect, the
> driver can work well without it, can report jack trigger to CPU by a GPIO.
>
> But here driver will register fail caused by failed to request irq.
>
> Signed-off-by: xujianqun <xjq@...k-chips.com>
> ---
>   sound/soc/codecs/max98090.c |    2 ++
>   1 file changed, 2 insertions(+)
>
> diff --git a/sound/soc/codecs/max98090.c b/sound/soc/codecs/max98090.c
> index 566919c..bc124ff 100644
> --- a/sound/soc/codecs/max98090.c
> +++ b/sound/soc/codecs/max98090.c
> @@ -2515,6 +2515,8 @@ static int max98090_probe(struct snd_soc_codec *codec)
>   
>   	max98090_add_widgets(codec);
>   
> +	return 0;
> +
>   err_access:
>   	return ret;
>   }
I would say it's better to call request_threaded_irq() conditionally 
when max98090->irq is valid in the same max98090_probe(). Also code 
should return instantly in case of request_threaded_irq() fails for 
valid irq.

Now code is still printing needless error message in case max98090->irq 
is invalid or not specified and continue probing in case 
request_threaded_irq() fails for valid irq.

-- 
Jarkko
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