linux-kernel - Re: [PATCH] media: pt3: Use dma_set_mask_and

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Date:   Tue, 04 Jan 2022 00:59:38 +0900
From:   Akihiro TSUKADA <tskd08@...il.com>
To:     Christophe JAILLET <christophe.jaillet@...adoo.fr>,
        mchehab@...nel.org, andy.shevchenko@...il.com,
        kirill.shilimanov@...wei.com, novikov@...ras.ru
Cc:     linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
        kernel-janitors@...r.kernel.org
Subject: Re: [PATCH] media: pt3: Use dma_set_mask_and_coherent() and
 simplify code

> Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr>
> ---
>  drivers/media/pci/pt3/pt3.c | 16 ++++------------
>  1 file changed, 4 insertions(+), 12 deletions(-)
> 
> diff --git a/drivers/media/pci/pt3/pt3.c
> b/drivers/media/pci/pt3/pt3.c
> index 0d51bdf01f43..11f26cac0abc 100644
> --- a/drivers/media/pci/pt3/pt3.c
> +++ b/drivers/media/pci/pt3/pt3.c
> @@ -707,18 +707,10 @@ static int pt3_probe(struct pci_dev *pdev,
> const struct pci_device_id *ent)
>         if (ret < 0)
>                 return ret;
>  
> -       ret = dma_set_mask(&pdev->dev, DMA_BIT_MASK(64));
> -       if (ret == 0)
> -               dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64));
> -       else {
> -               ret = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
> -               if (ret == 0)
> -                       dma_set_coherent_mask(&pdev->dev,
> DMA_BIT_MASK(32));
> -               else {
> -                       dev_err(&pdev->dev, "Failed to set DMA
> mask\n");
> -                       return ret;
> -               }
> -               dev_info(&pdev->dev, "Use 32bit DMA\n");
> +       ret = dma_set_mask_and_coherent(&pdev->dev,
> DMA_BIT_MASK(64));
> +       if (ret) {
> +               dev_err(&pdev->dev, "Failed to set DMA mask\n");
> +               return ret;
>         }
>  
>         pt3 = devm_kzalloc(&pdev->dev, sizeof(*pt3), GFP_KERNEL);

tested on x86_64.

Acked-by: Akihiro Tsukada <tskd08@...il.com>