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 17:00:16 +0800
From:	Jianqun <xjq@...k-chips.com>
To:	Jarkko Nikula <jarkko.nikula@...ux.intel.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 2014年07月30日 14:29, Jarkko Nikula wrote:
> 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.
> 

Add a valid check could be better, thanks Jarkko~

I'm working a board with max98090, this is a really problem for me now,
the IRQ shouldn't cause the driver fail to register.

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许 剑 群 Jay
Rockchip Electronics Co.Ltd
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