netdev - Re: [PATCH 2.6.21-rc5] b44: fix IFF_ALLMULTI handling of CAM slots

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Date:	Tue, 03 Apr 2007 22:31:40 -0400
From:	Jeff Garzik <jgarzik@...ox.com>
To:	Bill Helfinstine <bhelf@...tterfly.whirpon.com>
CC:	zambrano@...adcom.com, netdev@...r.kernel.org
Subject: Re: [PATCH 2.6.21-rc5] b44: fix IFF_ALLMULTI handling of CAM slots

Bill Helfinstine wrote:
> If you set the IFF_ALLMULTI flag on a b44 device, or if you join more than
> B44_MCAST_TABLE_SIZE multicast groups, the device will stop receiving unicast
> messages.  This is because the __b44_set_mac_addr call sets the zeroth CAM
> entry to the MAC address of the device, and then the loop at line 1722
> proceeds to overwrite it unless the value of i is set by the __b44_load_mcast
> call.  However, when IFF_ALLMULTI is set, that call is bypassed, leaving i set
> to zero.  
> 
> Fixed by starting the loop at 1 to make it skip the CAM entry for the MAC
> address.
> 
> Signed-off-by: Bill Helfinstine <bhelf@...tterfly.whirpon.com>

applied


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