linux-kernel - Re: [PATCH] leds: ncp5623: Use common error handling code in ncp5623

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Date: Thu, 13 Jun 2024 15:47:03 +0100
From: Lee Jones <lee@...nel.org>
To: Markus Elfring <Markus.Elfring@....de>
Cc: linux-leds@...r.kernel.org, Abdel Alkuor <alkuor@...il.com>,
	Pavel Machek <pavel@....cz>, LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] leds: ncp5623: Use common error handling code in
 ncp5623_probe()

On Wed, 05 Jun 2024, Markus Elfring wrote:

> From: Markus Elfring <elfring@...rs.sourceforge.net>
> Date: Wed, 5 Jun 2024 16:19:26 +0200
> 
> Add a label so that a bit of exception handling can be better reused
> at the end of this function implementation.
> 
> Signed-off-by: Markus Elfring <elfring@...rs.sourceforge.net>
> ---
>  drivers/leds/rgb/leds-ncp5623.c | 16 ++++++++--------
>  1 file changed, 8 insertions(+), 8 deletions(-)
> 
> diff --git a/drivers/leds/rgb/leds-ncp5623.c b/drivers/leds/rgb/leds-ncp5623.c
> index 2be4ff918516..f18156683375 100644
> --- a/drivers/leds/rgb/leds-ncp5623.c
> +++ b/drivers/leds/rgb/leds-ncp5623.c
> @@ -183,16 +183,12 @@ static int ncp5623_probe(struct i2c_client *client)
> 
>  	fwnode_for_each_available_child_node(mc_node, led_node) {
>  		ret = fwnode_property_read_u32(led_node, "color", &color_index);
> -		if (ret) {
> -			fwnode_handle_put(led_node);
> -			goto release_mc_node;
> -		}
> +		if (ret)
> +			goto release_led_node;
> 
>  		ret = fwnode_property_read_u32(led_node, "reg", &reg);
> -		if (ret) {
> -			fwnode_handle_put(led_node);
> -			goto release_mc_node;
> -		}
> +		if (ret)
> +			goto release_led_node;
> 
>  		subled_info[ncp->mc_dev.num_colors].channel = reg;
>  		subled_info[ncp->mc_dev.num_colors++].color_index = color_index;
> @@ -223,6 +219,10 @@ static int ncp5623_probe(struct i2c_client *client)
>  	fwnode_handle_put(mc_node);
> 
>  	return ret;
> +
> +release_led_node:
> +	fwnode_handle_put(led_node);
> +	goto release_mc_node;

No, we're not bouncing around the function like that.

Only use gotos to skip _down_ to error handling code please.

>  }
> 
>  static void ncp5623_remove(struct i2c_client *client)
> --
> 2.45.1
> 

-- 
Lee Jones [李琼斯]