linux-kernel - Re: [PATCH] vdpa: ifcvf: Use dma_set_mask_and

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Date:   Mon, 30 Nov 2020 10:20:34 +0800
From:   Jason Wang <jasowang@...hat.com>
To:     Christophe JAILLET <christophe.jaillet@...adoo.fr>, mst@...hat.com,
        lingshan.zhu@...el.com, eli@...lanox.com, parav@...lanox.com
Cc:     virtualization@...ts.linux-foundation.org,
        linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org
Subject: Re: [PATCH] vdpa: ifcvf: Use dma_set_mask_and_coherent to simplify
 code


On 2020/11/29 下午8:54, Christophe JAILLET wrote:
> 'pci_set_dma_mask()' + 'pci_set_consistent_dma_mask()' can be replaced by
> an equivalent 'dma_set_mask_and_coherent()' which is much less verbose.
>
> While at it, fix a typo (s/confiugration/configuration)
>
> Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr>
> ---


Acked-by: Jason Wang <jasowang@...hat.com>


>   drivers/vdpa/ifcvf/ifcvf_main.c | 11 ++---------
>   1 file changed, 2 insertions(+), 9 deletions(-)
>
> diff --git a/drivers/vdpa/ifcvf/ifcvf_main.c b/drivers/vdpa/ifcvf/ifcvf_main.c
> index 8b4028556cb6..fa1af301cf55 100644
> --- a/drivers/vdpa/ifcvf/ifcvf_main.c
> +++ b/drivers/vdpa/ifcvf/ifcvf_main.c
> @@ -417,16 +417,9 @@ static int ifcvf_probe(struct pci_dev *pdev, const struct pci_device_id *id)
>   		return ret;
>   	}
>   
> -	ret = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
> +	ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64));
>   	if (ret) {
> -		IFCVF_ERR(pdev, "No usable DMA confiugration\n");
> -		return ret;
> -	}
> -
> -	ret = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
> -	if (ret) {
> -		IFCVF_ERR(pdev,
> -			  "No usable coherent DMA confiugration\n");
> +		IFCVF_ERR(pdev, "No usable DMA configuration\n");
>   		return ret;
>   	}
>