linux-kernel - Re: [PATCH 03/35] media: uvcvideo: Refactor iterators

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Message-ID: <20240416043916.GA14947@google.com>
Date: Tue, 16 Apr 2024 13:39:16 +0900
From: Sergey Senozhatsky <senozhatsky@...omium.org>
To: Ricardo Ribalda <ribalda@...omium.org>
Cc: Martin Tuma <martin.tuma@...iteqautomotive.com>,
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Subject: Re: [PATCH 03/35] media: uvcvideo: Refactor iterators

On (24/04/15 19:34), Ricardo Ribalda wrote:
[..]
> @@ -2165,7 +2167,7 @@ static int uvc_ctrl_init_xu_ctrl(struct uvc_device *dev,
>  int uvc_xu_ctrl_query(struct uvc_video_chain *chain,
>  	struct uvc_xu_control_query *xqry)
>  {
> -	struct uvc_entity *entity;
> +	struct uvc_entity *entity, *iter;
>  	struct uvc_control *ctrl;
>  	unsigned int i;
>  	bool found;

Is `found` still used?

> @@ -2175,16 +2177,16 @@ int uvc_xu_ctrl_query(struct uvc_video_chain *chain,
>  	int ret;
>  
>  	/* Find the extension unit. */
> -	found = false;
> -	list_for_each_entry(entity, &chain->entities, chain) {
> -		if (UVC_ENTITY_TYPE(entity) == UVC_VC_EXTENSION_UNIT &&
> -		    entity->id == xqry->unit) {
> -			found = true;
> +	entity = NULL;
> +	list_for_each_entry(iter, &chain->entities, chain) {
> +		if (UVC_ENTITY_TYPE(iter) == UVC_VC_EXTENSION_UNIT &&
> +		    iter->id == xqry->unit) {
> +			entity = iter;
>  			break;
>  		}
>  	}
>  
> -	if (!found) {
> +	if (!entity) {
>  		uvc_dbg(chain->dev, CONTROL, "Extension unit %u not found\n",
>  			xqry->unit);
>  		return -ENOENT;