linux-kernel - Re: [PATCH] dma: dw: switch from 'pci_' to 'dma

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Date:   Fri, 17 Sep 2021 22:12:39 +0300
From:   Andy Shevchenko <andy.shevchenko@...il.com>
To:     Qing Wang <wangqing@...o.com>
Cc:     Viresh Kumar <vireshk@...nel.org>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Vinod Koul <vkoul@...nel.org>, dmaengine@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] dma: dw: switch from 'pci_' to 'dma_' API

On Fri, Sep 17, 2021 at 7:37 PM Qing Wang <wangqing@...o.com> wrote:
>
> The wrappers in include/linux/pci-dma-compat.h should go away.
>
> The patch has been generated with the coccinelle script below.

> expression e1, e2;
> @@
> -    pci_set_dma_mask(e1, e2)
> +    dma_set_mask(&e1->dev, e2)
>
> @@
> expression e1, e2;
> @@
> -    pci_set_consistent_dma_mask(e1, e2)
> +    dma_set_coherent_mask(&e1->dev, e2)

No need to cite the script.
With this addressed,
Reviewed-by: Andy Shevchenko <andy.shevchenko@...il.com>

>
> While at it, some 'dma_set_mask()/dma_set_coherent_mask()' have been
> updated to a much less verbose 'dma_set_mask_and_coherent()'.
>
> This type of patches has been going on for a long time, I plan to
> clean it up in the near future. If needed, see post from
> Christoph Hellwig on the kernel-janitors ML:
> https://marc.info/?l=kernel-janitors&m=158745678307186&w=4
>
> Signed-off-by: Qing Wang <wangqing@...o.com>
> ---
>  drivers/dma/dw/pci.c | 6 +-----
>  1 file changed, 1 insertion(+), 5 deletions(-)
>
> diff --git a/drivers/dma/dw/pci.c b/drivers/dma/dw/pci.c
> index 1142aa6..1dec1ae
> --- a/drivers/dma/dw/pci.c
> +++ b/drivers/dma/dw/pci.c
> @@ -32,11 +32,7 @@ static int dw_pci_probe(struct pci_dev *pdev, const struct pci_device_id *pid)
>         pci_set_master(pdev);
>         pci_try_set_mwi(pdev);
>
> -       ret = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
> -       if (ret)
> -               return ret;
> -
> -       ret = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
> +       ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
>         if (ret)
>                 return ret;
>
> --
> 2.7.4
>


-- 
With Best Regards,
Andy Shevchenko