[PATCH 3/3] net: hisilicon: new hip04 ethernet driver

[Arnd Bergmann]

On Monday 24 March 2014 09:32:17 Florian Fainelli wrote:
> > +       priv->tx_skb[tx_head] = skb;
> > +       priv->tx_phys[tx_head] = phys;
> > +       desc->send_addr = cpu_to_be32(phys);
> > +       desc->send_size = cpu_to_be16(skb->len);
> > +       desc->cfg = cpu_to_be32(DESC_DEF_CFG);
> > +       phys = priv->tx_desc_dma + tx_head * sizeof(struct tx_desc);
> > +       desc->wb_addr = cpu_to_be32(phys);
> 
> Don't we need a barrier here to ensure that all stores are completed
> before we hand this descriptor address to hip40_set_xmit_desc() which
> should make DMA start processing it?

I would think the writel() in set_xmit_desc() implies the barrier.

	Arnd