linux-kernel - Re: [PATCH v2] remove indentation for common path [linux-next]

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Date: Sun, 21 Apr 2024 06:13:58 +0530
From: sundar <prosunofficial@...il.com>
To: Joe Perches <joe@...ches.com>, heikki.krogerus@...ux.intel.com,
 gregkh@...uxfoundation.org, neil.armstrong@...aro.org,
 dmitry.baryshkov@...aro.org, u.kleine-koenig@...gutronix.de,
 christophe.jaillet@...adoo.fr
Cc: linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
 skhan@...uxfoundation.org, javier.carrasco.cruz@...il.com
Subject: Re: [PATCH v2] remove indentation for common path [linux-next]

On 20/04/24 22:37, Joe Perches wrote:
> On Sat, 2024-04-20 at 22:19 +0530, sundar wrote:
>
> 
>> ```
> @@ -321,35 +321,37 @@ static int nb7vpq904m_parse_data_lanes_mapping(struct nb7vpq904m *nb7)
>   
>   	ep = of_graph_get_endpoint_by_regs(nb7->client->dev.of_node, 1, 0);
>   
> -	if (ep) {
> -		ret = of_property_count_u32_elems(ep, "data-lanes");
> -		if (ret == -EINVAL)
> -			/* Property isn't here, consider default mapping */
> -			goto out_done;
> -		if (ret < 0)
> -			goto out_error;
> -
> -		if (ret != DATA_LANES_COUNT) {
> -			dev_err(&nb7->client->dev, "expected 4 data lanes\n");
> -			ret = -EINVAL;
> -			goto out_error;
> -		}
> +	if (!ep)
> +		return 0;
> ```
> 
> 
> Not equivalent code as the out_error:
> 
> 	of_node_put(ep);
> 
> isn't done
> 
> 

Hi joe perches,

If ep is null,  I believe we dont need to call of_node_put.  Because 
passing null pointer to of_node_put() make no difference.

In of_node_put() definition, if pointer is null, there is no operation.


Thanks,
Sundar