linux-kernel - Re: [PATCH] charger-manager: Fix checking of wrong return type

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Message-id: <5329208B.3090401@samsung.com>
Date:	Wed, 19 Mar 2014 13:43:55 +0900
From:	Chanwoo Choi <cw00.choi@...sung.com>
To:	Chanwoo Choi <cw00.choi@...sung.com>
Cc:	dbaryshkov@...il.com, dwmw2@...radead.org,
	myungjoo.ham@...sung.com, kyungmin.park@...sung.com,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] charger-manager: Fix checking of wrong return type

Ping.

Thanks,
Chanwoo Choi

On 03/17/2014 08:33 PM, Chanwoo Choi wrote:
> This patch fix minor issue about checking wrong return type.
> 
> The of_cm_parse_desc() return ERR_PTR(errnor number) when some error happen
> in this function. But, charger_manager_probe() has only checked whether
> desc is NULL or not. If of_cm_parse_desc() returns ERR_PTR(-ENOMEM), desc
> isn't NULL but desc is (void *)(-ENOMEM). Althouhg some error happen for parsing
> DT, charger_manager_probe() can't detect error of desc instance.
> 
> Signed-off-by: Chanwoo Choi <cw00.choi@...sung.com>
> Signed-off-by: Myungjoo Ham <myungjoo.ham@...sung.com>
> ---
>  drivers/power/charger-manager.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/power/charger-manager.c b/drivers/power/charger-manager.c
> index 9e4dab4..a10fb57 100644
> --- a/drivers/power/charger-manager.c
> +++ b/drivers/power/charger-manager.c
> @@ -1677,7 +1677,7 @@ static int charger_manager_probe(struct platform_device *pdev)
>  		}
>  	}
>  
> -	if (!desc) {
> +	if (IS_ERR(desc)) {
>  		dev_err(&pdev->dev, "No platform data (desc) found\n");
>  		return -ENODEV;
>  	}
> 

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