linux-kernel - Re: [PATCH] Gigabit Ethernet driver of Topcliff PCH

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Message-ID: <001601cb54d3$3aceb8d0$66f8800a@maildom.okisemi.com>
Date:	Wed, 15 Sep 2010 21:19:36 +0900
From:	"Masayuki Ohtake" <masa-korg@....okisemi.com>
To:	"David Miller" <davem@...emloft.net>
Cc:	<randy.dunlap@...cle.com>, <ralf@...ux-mips.org>,
	<eric.dumazet@...il.com>, "ML netdev" <netdev@...r.kernel.org>,
	<meego-dev@...go.com>, <mbizon@...ebox.fr>,
	"ML linux-kernel" <linux-kernel@...r.kernel.org>,
	<kristoffer@...sler.com>, <john.linn@...inx.com>,
	<joe@...ches.com>, <gregory.v.rose@...el.com>,
	"Wang, Yong Y" <yong.y.wang@...el.com>,
	"Wang, Qi" <qi.wang@...el.com>, "okada" <okada533@....okisemi.com>,
	"Morinaga" <morinaga526@....okisemi.com>,
	"shimizu" <shimizu394@....okisemi.com>,
	"Intel OTC" <joel.clark@...el.com>,
	"Foster, Margie" <margie.foster@...el.com>,
	<andrew.chih.howe.khor@...el.com>
Subject: Re: [PATCH] Gigabit Ethernet driver of Topcliff PCH

Hi David

Thank you for your comments.
I will modify like your comment and resubmit patch.

Thanks Ohtake
-----
Date: Wed, 08 Sep 2010 13:36:27 -0700 (PDT)
From: "David Miller" <davem@...emloft.net>
> > +/**
> > + * pch_gbe_clean_rx - Send received data up the network stack; legacy
> > + * @adapter:     Board private structure
> > + * @rx_ring:     Rx descriptor ring
> > + * @work_done:   Completed count
> > + * @work_to_do:  Request count
> > + * Returns
> > + * true:  Cleaned the descriptor
> > + * false: Not cleaned the descriptor
> > + */
> > +static bool
> > +pch_gbe_clean_rx(struct pch_gbe_adapter *adapter,
> > + struct pch_gbe_rx_ring *rx_ring,
> > + int *work_done, int work_to_do)
> > +{
> ..
> > + if (netif_receive_skb(skb) == NET_RX_DROP) {
> > + adapter->stats.rx_dropped++;
>
> pch_gbe_clean_rx() should be given the "napi_struct" pointer
> argument from it's caller, and packets should be given to the
> stack using napi_gro_receive().  Finally, NETIF_F_GRO should
> be set in netdev->flags at probe time.
>
> Also, you should not use the return value of netif_receive_skb() to
> bump the standard rx_dropped statistics value, those return code are
> for other purposes.  No other driver does what you are doing with this
> return value.
>
> If you wish to increment some extended stastic value (like
> drivers/net/gianfar.c does) with another name, that's fine.
>



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