From: David Miller <davem@davemloft.net>
To: florian@openwrt.org
Cc: netdev@vger.kernel.org
Subject: Re: [PATCH 1/2 net-next-2.6] r6040: fix multicast operations
Date: Wed, 23 Feb 2011 14:22:54 -0800 (PST) [thread overview]
Message-ID: <20110223.142254.59671988.davem@davemloft.net> (raw)
In-Reply-To: <201102231532.34849.florian@openwrt.org>
From: Florian Fainelli <florian@openwrt.org>
Date: Wed, 23 Feb 2011 15:32:34 +0100
> From: Shawn Lin <shawn@dmp.com.tw>
>
> The original code does not work well when the number of mulitcast
> address to handle is greater than MCAST_MAX. It only enable promiscous
> mode instead of multicast hash table mode, so the hash table function
> will not be activated and all multicast frames will be recieved in this
> condition.
>
> This patch fixes the following issues with the r6040 NIC operating in
> multicast:
>
> 1) When the IFF_ALLMULTI flag is set, we should write 0xffff to the NIC
> hash table registers to make it process multicast traffic.
>
> 2) When the number of multicast address to handle is smaller than
> MCAST_MAX, we should use the NIC multicast registers MID1_{L,M,H}.
>
> 3) The hashing of the address was not correct, due to an invalid
> substraction (15 - (crc & 0x0f)) instead of (crc & 0x0f) and an
> incorrect crc algorithm (ether_crc_le) instead of (ether_crc).
>
> 4) If necessary, we should set HASH_EN flag in MCR0 to enable multicast
> hash table function.
>
> CC: stable@kernel.org
If it's not appropriate for net-2.6, it's not appropriate for -stable
either.
I'm applying this to net-next-2.6, as you requested, and removing the
stable CC: tag from the commit message.
> Reported-by: Marc Leclerc <marc-leclerc@signaturealpha.com>
> Tested-by: Marc Leclerc <marc-leclerc@signaturealpha.com>
> Signed-off-by: Shawn Lin <shawn@dmp.com.tw>
> Signed-off-by: Albert Chen <albert.chen@rdc.com.tw>
> Signed-off-by: Florian Fainelli <florian@openwrt.org>
next prev parent reply other threads:[~2011-02-23 22:22 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-02-23 14:32 [PATCH 1/2 net-next-2.6] r6040: fix multicast operations Florian Fainelli
2011-02-23 22:22 ` David Miller [this message]
2011-02-23 22:32 ` Florian Fainelli
2011-02-23 22:35 ` David Miller
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