netdev - Re: [PATCH] net: moxa: inherit DMA masks to make dma_map

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Message-ID: <CABikg9wm=8rbBFP0vaVHpGBJfXOi4k0bvwK7F+agMXEPfFn2RQ@mail.gmail.com>
Date:   Fri, 12 Aug 2022 19:35:43 +0300
From:   Sergei Antonov <saproj@...il.com>
To:     Andrew Lunn <andrew@...n.ch>
Cc:     netdev@...r.kernel.org, Jakub Kicinski <kuba@...nel.org>,
        Pavel Skripkin <paskripkin@...il.com>,
        "David S . Miller" <davem@...emloft.net>,
        Guobin Huang <huangguobin4@...wei.com>,
        Paolo Abeni <pabeni@...hat.com>
Subject: Re: [PATCH] net: moxa: inherit DMA masks to make dma_map_single() work

On Fri, 12 Aug 2022 at 19:13, Andrew Lunn <andrew@...n.ch> wrote:
> > +     /* Inherit the DMA masks from the platform device */
> > +     ndev->dev.dma_mask = p_dev->dma_mask;
> > +     ndev->dev.coherent_dma_mask = p_dev->coherent_dma_mask;
>
> There is only one other ethernet driver which does this. What you see
> much more often is:
>
> alacritech/slicoss.c:   paddr = dma_map_single(&sdev->pdev->dev, skb->data, maplen,
> neterion/s2io.c:                                dma_map_single(&sp->pdev->dev, ba->ba_1,
> dlink/dl2k.c:                       cpu_to_le64(dma_map_single(&np->pdev->dev, skb->data,
> micrel/ksz884x.c:               dma_buf->dma = dma_map_single(&hw_priv->pdev->dev, skb->data,

Also works. Do you recommend to create a v2 of the patch?