linux-kernel - Re: [PATCH -next v4] media: staging: atomisp: use list_splice_init in atomisp_compat

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Message-ID: <64892fe9-018f-a87a-66ea-414c1b814a3b@huawei.com>
Date:   Thu, 17 Jun 2021 20:48:24 +0800
From:   "libaokun (A)" <libaokun1@...wei.com>
To:     <mchehab@...nel.org>, <sakari.ailus@...ux.intel.com>,
        <gregkh@...uxfoundation.org>, <andriy.shevchenko@...ux.intel.com>,
        <kaixuxia@...cent.com>, <gustavoars@...nel.org>,
        <linux-media@...r.kernel.org>, <linux-staging@...ts.linux.dev>,
        <linux-kernel@...r.kernel.org>
CC:     <weiyongjun1@...wei.com>, <yuehaibing@...wei.com>,
        <yangjihong1@...wei.com>, <yukuai3@...wei.com>,
        Hulk Robot <hulkci@...wei.com>
Subject: Re: [PATCH -next v4] media: staging: atomisp: use list_splice_init in
 atomisp_compat_css20.c

Please ignore this email.

I have forgot the version information.

I'm about to send a patch v5 with the version information.

Best Regards.


在 2021/6/17 20:47, Baokun Li 写道:
> Using list_splice_init() instead of entire while-loops
> in atomisp_compat_css20.c.
>
> Reported-by: Hulk Robot <hulkci@...wei.com>
> Signed-off-by: Baokun Li <libaokun1@...wei.com>
> ---
>   .../media/atomisp/pci/atomisp_compat_css20.c  | 35 +++----------------
>   1 file changed, 5 insertions(+), 30 deletions(-)
>
> diff --git a/drivers/staging/media/atomisp/pci/atomisp_compat_css20.c b/drivers/staging/media/atomisp/pci/atomisp_compat_css20.c
> index f60198bb8a1a..7831bdac96ff 100644
> --- a/drivers/staging/media/atomisp/pci/atomisp_compat_css20.c
> +++ b/drivers/staging/media/atomisp/pci/atomisp_compat_css20.c
> @@ -2144,42 +2144,17 @@ void atomisp_css_stop(struct atomisp_sub_device *asd,
>   	}
>   
>   	/* move stats buffers to free queue list */
> -	while (!list_empty(&asd->s3a_stats_in_css)) {
> -		s3a_buf = list_entry(asd->s3a_stats_in_css.next,
> -				     struct atomisp_s3a_buf, list);
> -		list_del(&s3a_buf->list);
> -		list_add_tail(&s3a_buf->list, &asd->s3a_stats);
> -	}
> -	while (!list_empty(&asd->s3a_stats_ready)) {
> -		s3a_buf = list_entry(asd->s3a_stats_ready.next,
> -				     struct atomisp_s3a_buf, list);
> -		list_del(&s3a_buf->list);
> -		list_add_tail(&s3a_buf->list, &asd->s3a_stats);
> -	}
> +	list_splice_init(&asd->s3a_stats_in_css, &asd->s3a_stats);
> +	list_splice_init(&asd->s3a_stats_ready, &asd->s3a_stats);
>   
>   	spin_lock_irqsave(&asd->dis_stats_lock, irqflags);
> -	while (!list_empty(&asd->dis_stats_in_css)) {
> -		dis_buf = list_entry(asd->dis_stats_in_css.next,
> -				     struct atomisp_dis_buf, list);
> -		list_del(&dis_buf->list);
> -		list_add_tail(&dis_buf->list, &asd->dis_stats);
> -	}
> +	list_splice_init(&asd->dis_stats_in_css, &asd->dis_stats);
>   	asd->params.dis_proj_data_valid = false;
>   	spin_unlock_irqrestore(&asd->dis_stats_lock, irqflags);
>   
>   	for (i = 0; i < ATOMISP_METADATA_TYPE_NUM; i++) {
> -		while (!list_empty(&asd->metadata_in_css[i])) {
> -			md_buf = list_entry(asd->metadata_in_css[i].next,
> -					    struct atomisp_metadata_buf, list);
> -			list_del(&md_buf->list);
> -			list_add_tail(&md_buf->list, &asd->metadata[i]);
> -		}
> -		while (!list_empty(&asd->metadata_ready[i])) {
> -			md_buf = list_entry(asd->metadata_ready[i].next,
> -					    struct atomisp_metadata_buf, list);
> -			list_del(&md_buf->list);
> -			list_add_tail(&md_buf->list, &asd->metadata[i]);
> -		}
> +		list_splice_init(&asd->metadata_in_css[i], &asd->metadata[i]);
> +		list_splice_init(&asd->metadata_ready[i], &asd->metadata[i]);
>   	}
>   
>   	atomisp_flush_params_queue(&asd->video_out_capture);