linux-kernel - Re: [PATCH v2 2/3] charger-manager: Fix bug when check dropped voltage after fullbatt event

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Date:	Sun, 16 Dec 2012 22:53:06 -0800
From:	Anton Vorontsov <anton.vorontsov@...aro.org>
To:	Chanwoo Choi <cw00.choi@...sung.com>
Cc:	myungjoo.ham@...sung.com, kyungmin.park@...sung.com,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 2/3] charger-manager: Fix bug when check dropped
 voltage after fullbatt event

On Thu, Nov 22, 2012 at 04:53:51PM +0900, Chanwoo Choi wrote:
> This patch check difference value between current voltage of battery
> and desc->fullbatt_uV whether positve or negative number. If difference
> value is negative number when current voltage of battery is larger than
> desc->fullbatt_uV, charger-manager return immediately because battery
> is fully charged.
> 
> Signed-off-by: Chanwoo Choi <cw00.choi@...sung.com>
> Signed-off-by: Myungjoo Ham <myungjoo.ham@...sung.com>
> Signed-off-by: Kyungmin Park <kyungmin.park@...sung.com>
> ---
>  drivers/power/charger-manager.c |    9 ++++++---
>  1 files changed, 6 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/power/charger-manager.c b/drivers/power/charger-manager.c
> index ee039b9..17130c7 100644
> --- a/drivers/power/charger-manager.c
> +++ b/drivers/power/charger-manager.c
> @@ -468,7 +468,9 @@ static void fullbatt_vchk(struct work_struct *work)
>  	struct charger_manager *cm = container_of(dwork,
>  			struct charger_manager, fullbatt_vchk_work);
>  	struct charger_desc *desc = cm->desc;
> -	int batt_uV, err, diff;
> +	int batt_uV;
> +	int err;
> +	int diff;

I applied the patch, but dropped this part. This is an unrelated style
fix, and, if anything, it desires a separate patch (possibly 'fixing' the
whole file/driver).

Thanks!

>  	/* remove the appointment for fullbatt_vchk */
>  	cm->fullbatt_vchk_jiffies_at = 0;
> @@ -482,8 +484,9 @@ static void fullbatt_vchk(struct work_struct *work)
>  		return;
>  	}
>  
> -	diff = desc->fullbatt_uV;
> -	diff -= batt_uV;
> +	diff = desc->fullbatt_uV - batt_uV;
> +	if (diff < 0)
> +		return;
>  
>  	dev_info(cm->dev, "VBATT dropped %duV after full-batt.\n", diff);
>  
> -- 
> 1.7.0.4
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