linux-kernel - Re: [PATCH 2/2] extcon: arizona: Fix race with microphone detection and removal

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Message-id: <5276EC68.1040505@samsung.com>
Date:	Mon, 04 Nov 2013 09:38:00 +0900
From:	Chanwoo Choi <cw00.choi@...sung.com>
To:	Charles Keepax <ckeepax@...nsource.wolfsonmicro.com>
Cc:	myungjoo.ham@...sung.com, patches@...nsource.wolfsonmicro.com,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] extcon: arizona: Fix race with microphone detection
 and removal

On 10/28/2013 01:19 AM, Charles Keepax wrote:
> The microphone detection code is run as delayed work to provide
> additional debounce, it is possible that the jack could have been
> removed by the time we process the microphone detection. Turn this case
> into a no op.
> 
> Signed-off-by: Charles Keepax <ckeepax@...nsource.wolfsonmicro.com>
> ---
> 
> As Lee Jones took the first patch (extcon: arizona: Add
> defines for microphone detection levels) of my series
> yesterday through his tree I have based this patch on the
> extcon tree without that change applied.
> 
> Thanks,
> Charles
> 
>  drivers/extcon/extcon-arizona.c |    6 ++++++
>  1 files changed, 6 insertions(+), 0 deletions(-)
> 
> diff --git a/drivers/extcon/extcon-arizona.c b/drivers/extcon/extcon-arizona.c
> index dac8ba0..9c20850 100644
> --- a/drivers/extcon/extcon-arizona.c
> +++ b/drivers/extcon/extcon-arizona.c
> @@ -773,6 +773,12 @@ static void arizona_micd_detect(struct work_struct *work)
>  
>  	mutex_lock(&info->lock);
>  
> +	if (!info->cable) {
> +		dev_dbg(arizona->dev, "Ignoring MICDET for removed cable\n");
> +		mutex_unlock(&info->lock);
> +		return;
> +	}
> +
>  	for (i = 0; i < 10 && !(val & 0x7fc); i++) {
>  		ret = regmap_read(arizona->regmap, ARIZONA_MIC_DETECT_3, &val);
>  		if (ret != 0) {
> 

This patch has build break as below log:

drivers/extcon/extcon-arizona.c: In function ‘arizona_micd_detect’:
drivers/extcon/extcon-arizona.c:776:11: error: ‘struct arizona_extcon_info’ has no member named ‘cable’

The arizona_extcon_info structure hasn't included 'cable' field.

Cheers,
Chanwoo Choi
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