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Message-ID: <23f6b3fb-4c9d-485f-bb84-3f97a70c8a71@xs4all.nl>
Date:   Tue, 19 Sep 2023 15:52:14 +0200
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Subject: Re: [PATCH v7 25/49] media: pci: netup_unidvb: Stop direct calls to
 queue num_buffers field
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To:     Benjamin Gaignard <benjamin.gaignard@collabora.com>,
        mchehab@kernel.org, tfiga@chromium.org, m.szyprowski@samsung.com,
        ming.qian@nxp.com, ezequiel@vanguardiasur.com.ar,
        p.zabel@pengutronix.de, gregkh@linuxfoundation.org,
        nicolas.dufresne@collabora.com
Cc:     linux-media@vger.kernel.org, linux-kernel@vger.kernel.org,
        linux-arm-kernel@lists.infradead.org,
        linux-mediatek@lists.infradead.org, linux-arm-msm@vger.kernel.org,
        linux-rockchip@lists.infradead.org, linux-staging@lists.linux.dev,
        kernel@collabora.com
References: <20230914133323.198857-1-benjamin.gaignard@collabora.com>
 <20230914133323.198857-26-benjamin.gaignard@collabora.com>
From:   Hans Verkuil <hverkuil-cisco@xs4all.nl>
In-Reply-To: <20230914133323.198857-26-benjamin.gaignard@collabora.com>
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On 14/09/2023 15:32, Benjamin Gaignard wrote:
> Use vb2_get_num_buffers() to avoid using queue num_buffer field directly.
> 
> Signed-off-by: Benjamin Gaignard <benjamin.gaignard@collabora.com>
> ---
>  drivers/media/pci/netup_unidvb/netup_unidvb_core.c | 5 +++--
>  1 file changed, 3 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/media/pci/netup_unidvb/netup_unidvb_core.c b/drivers/media/pci/netup_unidvb/netup_unidvb_core.c
> index d85bfbb77a25..557985ba25db 100644
> --- a/drivers/media/pci/netup_unidvb/netup_unidvb_core.c
> +++ b/drivers/media/pci/netup_unidvb/netup_unidvb_core.c
> @@ -293,12 +293,13 @@ static int netup_unidvb_queue_setup(struct vb2_queue *vq,
>  				    struct device *alloc_devs[])
>  {
>  	struct netup_dma *dma = vb2_get_drv_priv(vq);
> +	unsigned int q_num_bufs = vb2_get_num_buffers(vq);
>  
>  	dev_dbg(&dma->ndev->pci_dev->dev, "%s()\n", __func__);
>  
>  	*nplanes = 1;
> -	if (vq->num_buffers + *nbuffers < VIDEO_MAX_FRAME)
> -		*nbuffers = VIDEO_MAX_FRAME - vq->num_buffers;
> +	if (q_num_bufs + *nbuffers < VIDEO_MAX_FRAME)
> +		*nbuffers = VIDEO_MAX_FRAME - q_num_bufs;

Just drop this, the vb2 core tests this already.

Regards,

	Hans

>  	sizes[0] = PAGE_ALIGN(NETUP_DMA_PACKETS_COUNT * 188);
>  	dev_dbg(&dma->ndev->pci_dev->dev, "%s() nbuffers=%d sizes[0]=%d\n",
>  		__func__, *nbuffers, sizes[0]);