bce: jumbo not working since r218423

[YongHyeon PYUN]

On Thu, Apr 26, 2012 at 03:23:19PM +0400, Andrey Zonov wrote:
> Hi,
> 
> I found that jumbo frames don't work after r218423 with bce driver.
> This happens because controller doesn't do reinitialization when MTU
> is changed.  Attached patch solves this problem.
> 

Could you verify whether attached diff addresses the issue?
Sorry, I couldn't setup my box yet due to some other reasons so the
diff was not tested.

> I also don't understand why sysctl hw.bce.loose_rx_mtu doesn't respect
> with tunnable hw.bce.strict_rx_mtu.  Is there any reason to give them
> different names?
> 

It may be an oversight. Personally I don't see any reason except
debugging purpose to limit RX frame size to interface MTU. It makes
sense when controller send frames but it should be able to receive
any sized RX frames(if controller allows it).  Dropping RX frames
that are bigger than interface MTU would break path MTU discovery
of remote host that uses bigger MTU.
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