linux-kernel - Re: [PATCH v14 06/56] media: videobuf2: Remove duplicated index vs q->num

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Date:   Wed, 8 Nov 2023 17:46:48 +0100
From:   Andrzej Pietrasiewicz <andrzej.p@...labora.com>
To:     Benjamin Gaignard <benjamin.gaignard@...labora.com>,
        mchehab@...nel.org, tfiga@...omium.org, m.szyprowski@...sung.com,
        ming.qian@....com, ezequiel@...guardiasur.com.ar,
        p.zabel@...gutronix.de, gregkh@...uxfoundation.org,
        hverkuil-cisco@...all.nl, nicolas.dufresne@...labora.com
Cc:     linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, linux-arm-msm@...r.kernel.org,
        linux-rockchip@...ts.infradead.org, linux-staging@...ts.linux.dev,
        kernel@...labora.com
Subject: Re: [PATCH v14 06/56] media: videobuf2: Remove duplicated index vs
 q->num_buffers check

W dniu 31.10.2023 o 17:30, Benjamin Gaignard pisze:
> vb2_get_buffer() already checks if the requested index is valid.
> Stop duplicating this kind of check everywhere.
> 
> Signed-off-by: Benjamin Gaignard <benjamin.gaignard@...labora.com>
Reviewed-by: Andrzej Pietrasiewicz <andrzej.p@...labora.com>

> ---
>   drivers/media/common/videobuf2/videobuf2-v4l2.c | 8 --------
>   1 file changed, 8 deletions(-)
> 
> diff --git a/drivers/media/common/videobuf2/videobuf2-v4l2.c b/drivers/media/common/videobuf2/videobuf2-v4l2.c
> index 2ffb097bf00a..c6ebc8d2c537 100644
> --- a/drivers/media/common/videobuf2/videobuf2-v4l2.c
> +++ b/drivers/media/common/videobuf2/videobuf2-v4l2.c
> @@ -823,10 +823,6 @@ int vb2_qbuf(struct vb2_queue *q, struct media_device *mdev,
>   		return -EBUSY;
>   	}
>   
> -	if (b->index >= q->num_buffers) {
> -		dprintk(q, 1, "buffer index out of range\n");
> -		return -EINVAL;
> -	}
>   	vb = vb2_get_buffer(q, b->index);
>   	if (!vb) {
>   		dprintk(q, 1, "can't find the requested buffer %u\n", b->index);
> @@ -898,10 +894,6 @@ int vb2_expbuf(struct vb2_queue *q, struct v4l2_exportbuffer *eb)
>   {
>   	struct vb2_buffer *vb;
>   
> -	if (eb->index >= q->num_buffers) {
> -		dprintk(q, 1, "buffer index out of range\n");
> -		return -EINVAL;
> -	}
>   	vb = vb2_get_buffer(q, eb->index);
>   	if (!vb) {
>   		dprintk(q, 1, "can't find the requested buffer %u\n", eb->index);