netdev - Re: [uclinux-dist-devel] [PATCH net-next-2.6] netdev: bfin_mac: Use is_multicast_ether

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Date:	Wed, 12 Jan 2011 09:18:01 -0800
From:	Joe Perches <joe@...ches.com>
To:	Mike Frysinger <vapier.adi@...il.com>
Cc:	Tobias Klauser <tklauser@...tanz.ch>,
	Michael Hennerich <michael.hennerich@...log.com>,
	uclinux-dist-devel@...ckfin.uclinux.org, netdev@...r.kernel.org
Subject: Re: [uclinux-dist-devel] [PATCH net-next-2.6] netdev: bfin_mac:
 Use is_multicast_ether_addr helper

On Wed, 2011-01-12 at 11:38 -0500, Mike Frysinger wrote:
> On Wed, Jan 12, 2011 at 04:30, Tobias Klauser wrote:
> > --- a/drivers/net/bfin_mac.c
> > +++ b/drivers/net/bfin_mac.c
> > @@ -1293,7 +1293,7 @@ static void bfin_mac_multicast_hash(struct net_device *dev)
> >                addrs = ha->addr;
> >
> >                /* skip non-multicast addresses */
> > -               if (!(*addrs & 1))
> > +               if (!is_multicast_ether_addr(addrs))
> >                        continue;
> 
> looks good to me ...
> Acked-by: Mike Frysinger <vapier@...too.org>

Does a netdev_for_each_mc_addr loop entry really
need to verify that the address is multicast?

Couldn't this just be:

	netdev_for_each_mc_addr(ha, dev) {
		crc = ether_crc(ETH_ALEN, ha->addr);
		crc >>= 26;

		if (crc & 0x20)
			emac_hashhi |= 1 << (crc & 0x1f);
		else
			emac_hashlo |= 1 << (crc & 0x1f);
	}


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