netdev - Re: [PATCH v2 net-next 10/15] net: ethernet: mtk_eth_soc: rely on rxd_size field in mtk_rx_alloc/mtk_rx

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Message-ID: <20220517183935.6863ddc7@kernel.org>
Date:   Tue, 17 May 2022 18:39:35 -0700
From:   Jakub Kicinski <kuba@...nel.org>
To:     Lorenzo Bianconi <lorenzo@...nel.org>
Cc:     netdev@...r.kernel.org, nbd@....name, john@...ozen.org,
        sean.wang@...iatek.com, Mark-MC.Lee@...iatek.com,
        davem@...emloft.net, edumazet@...gle.com, pabeni@...hat.com,
        Sam.Shih@...iatek.com, linux-mediatek@...ts.infradead.org,
        devicetree@...r.kernel.org, robh@...nel.org,
        lorenzo.bianconi@...hat.com
Subject: Re: [PATCH v2 net-next 10/15] net: ethernet: mtk_eth_soc: rely on
 rxd_size field in mtk_rx_alloc/mtk_rx_clean

On Mon, 16 May 2022 18:06:37 +0200 Lorenzo Bianconi wrote:
> +
> +		rxd = (void *)ring->dma + i * eth->soc->txrx.rxd_size;
> +		rxd->rxd1 = (unsigned int)dma_addr;
>  
>  		if (MTK_HAS_CAPS(eth->soc->caps, MTK_SOC_MT7628))
> -			ring->dma[i].rxd2 = RX_DMA_LSO;
> +			rxd->rxd2 = RX_DMA_LSO;
>  		else
> -			ring->dma[i].rxd2 = RX_DMA_PLEN0(ring->buf_size);
> +			rxd->rxd2 = RX_DMA_PLEN0(ring->buf_size);
> +
> +		rxd->rxd3 = 0;
> +		rxd->rxd4 = 0;

The clearing of rxd3/rxd4 should probably have been mentioned in the
commit message. It does not seem related to descriptor size.