linux-kernel - Re: [PATCH 1/2] power: charger-manager: regulator

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Date:	Tue, 25 Jun 2013 10:37:57 +0530
From:	Sachin Kamat <sachin.kamat@...aro.org>
To:	Jonghwa Lee <jonghwa3.lee@...sung.com>
Cc:	anton.vorontsov@...aro.org, linux-kernel@...r.kernel.org,
	Myungjoo Ham <myungjoo.ham@...sung.com>
Subject: Re: [PATCH 1/2] power: charger-manager: regulator_get() never returns NULL.

On 25 June 2013 10:32, Jonghwa Lee <jonghwa3.lee@...sung.com> wrote:
> This patch fixes return value checking of regulator_get() in charger-manager
> driver. The API, regulator_get(), returns ERR_PTR() when it fails to get
> regulator with given name, not NULL.
>
> Signed-off-by: Jonghwa Lee <jonghwa3.lee@...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 ba42029..7d1bcde 100644
> --- a/drivers/power/charger-manager.c
> +++ b/drivers/power/charger-manager.c
> @@ -1239,7 +1239,7 @@ static int charger_manager_register_extcon(struct charger_manager *cm)
>
>                 charger->consumer = regulator_get(cm->dev,
>                                         charger->regulator_name);
> -               if (charger->consumer == NULL) {
> +               if (IS_ERR(charger->consumer)) {
>                         dev_err(cm->dev, "Cannot find charger(%s)\n",
>                                 charger->regulator_name);
>                         ret = -EINVAL;

 You can as well make this ret = PTR_ERR(charger->consumer).

---
With warm regards,
Sachin
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