Subject: Re: [PATCH v4 01/10] ethernet: add sun8i-emac driver

From: Joe Perches <[email-masked]>
Date: Fri, 07 Oct 2016 08:02:39 -0700

On Fri, 2016-10-07 at 10:25 +0200, Corentin Labbe wrote:
> This patch add support for sun8i-emac ethernet MAC hardware.
> It could be found in Allwinner H3/A83T/A64 SoCs.

trivial notes:

> diff --git a/drivers/net/ethernet/allwinner/sun8i-emac.c b/drivers/net/ethernet/allwinner/sun8i-emac.c
[]
> +static const char const estats_str[][ETH_GSTRING_LEN] = {

one too many const

> +/* MAGIC value for knowing if a descriptor is available or not */
> +#define DCLEAN cpu_to_le32(BIT(16) | BIT(14) | BIT(12) | BIT(10) | BIT(9))

Aren't there #defines for these bits?

> +static void sun8i_emac_flow_ctrl(struct sun8i_emac_priv *priv, int duplex,
> +				 int fc)
> +{
> +	u32 flow = 0;
> +
> +	flow = readl(priv->base + EMAC_RX_CTL0);
> +	if (fc & EMAC_FLOW_RX)
> +		flow |= BIT(16);
> +	else
> +		flow &= ~BIT(16);
> +	writel(flow, priv->base + EMAC_RX_CTL0);
> +
> +	flow = readl(priv->base + EMAC_TX_FLOW_CTL);
> +	if (fc & EMAC_FLOW_TX)
> +		flow |= BIT(0);
> +	else
> +		flow &= ~BIT(0);

more magic bits that could be #defines

> +static int sun8i_emac_rx_from_ddesc(struct net_device *ndev, int i)
> +{
> []
> +	/* the checksum or length of received frame's payload is wrong*/
> +	if (dstatus & BIT(0)) {
[]
> +	if (dstatus & BIT(1)) {
[]
> +	if ((dstatus & BIT(3))) {

etc...