linux-kernel - Re: [PATCH v2] leds: lm3532: Fix optional led-max-microamp prop error handling

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Date:   Thu, 12 Sep 2019 20:32:54 +0200
From:   Jacek Anaszewski <jacek.anaszewski@...il.com>
To:     Dan Murphy <dmurphy@...com>, pavel@....cz
Cc:     linux-leds@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] leds: lm3532: Fix optional led-max-microamp prop error
 handling

Hi Dan,

Thank you for the update.

On 9/11/19 8:27 PM, Dan Murphy wrote:
> Fix the error handling for the led-max-microamp property.
> Need to check if the property is present and then if it is
> retrieve the setting and its max boundary
> 
> Reported-by: Pavel Machek <pavel@....cz>
> Signed-off-by: Dan Murphy <dmurphy@...com>
> ---
> 
> v2 - Changed full scale current check to use min function
> 
>  drivers/leds/leds-lm3532.c | 14 +++++++++-----
>  1 file changed, 9 insertions(+), 5 deletions(-)
> 
> diff --git a/drivers/leds/leds-lm3532.c b/drivers/leds/leds-lm3532.c
> index 62ace6698d25..a1742dc1f6fa 100644
> --- a/drivers/leds/leds-lm3532.c
> +++ b/drivers/leds/leds-lm3532.c
> @@ -601,11 +601,15 @@ static int lm3532_parse_node(struct lm3532_data *priv)
>  			goto child_out;
>  		}
>  
> -		ret = fwnode_property_read_u32(child, "led-max-microamp",
> -					       &led->full_scale_current);
> -
> -		if (led->full_scale_current > LM3532_FS_CURR_MAX)
> -			led->full_scale_current = LM3532_FS_CURR_MAX;
> +		if (fwnode_property_present(child, "led-max-microamp")) {
> +			if (fwnode_property_read_u32(child, "led-max-microamp",
> +						     &led->full_scale_current))
> +				dev_err(&priv->client->dev,
> +					"Failed getting led-max-microamp\n");
> +			else
> +				min(led->full_scale_current,
> +				    LM3532_FS_CURR_MAX);
> +		}
>  
>  		if (led->mode == LM3532_BL_MODE_ALS) {
>  			led->mode = LM3532_ALS_CTRL;
> 

Applied.

-- 
Best regards,
Jacek Anaszewski