lan9118: Ignore write to MAC_VLAN1 register

On Mon, 4 Apr 2011 20:15:30 +0200, Aurelien Jarno <aurelien@aurel32.net> wrote:
> Is it really safe ignoring write to this register? If yes, it's probably
> a good idea to explain why in a comment. In any case, if supporting this
> register is easy to do, it would be the best option.

I think it is safe.  Please see an updated comment below.

And though implementing this register might be possible, I suppose it
is not worth to supporting FrameTooLong detection, for now at least.

Thank you for comments.

>8---------------------------------------------------------------------
From: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Date: Tue, 5 Apr 2011 23:12:07 +0900
Subject: [PATCH] lan9118: Ignore write to MAC_VLAN1 register

Since linux 2.6.38, smsc911x driver writes to VLAN1 registger.
Since this register only affects FrameTooLong detection, ignoring
write to this register should be safe.

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>