linux-kernel - Re: [PATCH v4] net: add Faraday FTMAC100 10/100 Ethernet driver

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Message-ID: <1295600887.2601.5.camel@edumazet-laptop>
Date:	Fri, 21 Jan 2011 10:08:07 +0100
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Po-Yu Chuang <ratbert.chuang@...il.com>
Cc:	netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	bhutchings@...arflare.com, joe@...ches.com, dilinger@...ued.net,
	mirqus@...il.com, Po-Yu Chuang <ratbert@...aday-tech.com>
Subject: Re: [PATCH v4] net: add Faraday FTMAC100 10/100 Ethernet driver

Le vendredi 21 janvier 2011 à 15:55 +0800, Po-Yu Chuang a écrit :
> From: Po-Yu Chuang <ratbert@...aday-tech.com>
> 
> FTMAC100 Ethernet Media Access Controller supports 10/100 Mbps and
> MII.  This driver has been working on some ARM/NDS32 SoC's including
> Faraday A320 and Andes AG101.
> 
> Signed-off-by: Po-Yu Chuang <ratbert@...aday-tech.com>


> +
> +static bool ftmac100_tx_complete_packet(struct ftmac100 *priv)
> +{
...
> +
> +	dma_unmap_single(priv->dev, map, skb_headlen(skb), DMA_TO_DEVICE);
> +
> +	dev_kfree_skb_irq(skb);
> +
> +	ftmac100_txdes_reset(txdes);
> +
> +	ftmac100_tx_clean_pointer_advance(priv);
> +
> +	priv->tx_pending--;
> +	netif_wake_queue(netdev);
> +
> +	return true;
> +}
> +

Thanks to NAPI, you can free skb directly, not queuing it via
NET_TX_SOFTIRQ softirq, using dev_kfree_skb() instead of
dev_kfree_skb_irq()



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