[ofa-general] Re: socket buffer accounting with UDP/ipoib

[Michael S. Tsirkin]

> +		ib_dma_sync_single_for_cpu(priv->ca, addr, IPOIB_BUF_SIZE,
> +					   DMA_FROM_DEVICE);
> +		skb_copy_from_linear_data_offset(skb, IB_GRH_BYTES, new_skb->data,
> +						 wc->byte_len - IB_GRH_BYTES);
> +		ib_dma_sync_single_for_device(priv->ca, addr, IPOIB_BUF_SIZE,
> +					      DMA_FROM_DEVICE);

BTW, why is ib_dma_sync_single_for_device necessary here?

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MST