From 71822faa3bc0af5dbf5e333a2d085f1ed7cd809f Mon Sep 17 00:00:00 2001
From: Ilkka Virta <itvirta@iki.fi>
Date: Fri, 6 Feb 2009 22:00:36 -0800
Subject: [PATCH] sungem: Soft lockup in sungem on Netra AC200 when switching
 interface up

From: Ilkka Virta <itvirta@iki.fi>

In the lockup situation the driver seems to go off in an eternal storm
of interrupts right after calling request_irq(). It doesn't actually
do anything interesting in the interrupt handler. Since connecting the link
afterwards works, something later in initialization must fix this.

Looking at gem_do_start() and gem_open(), it seems that the only thing
done while opening the device after the request_irq(), is a call to
napi_enable().

I don't know what the ordering requirements are for the
initialization, but I boldly tried to move the napi_enable() call
inside gem_do_start() before the link state is checked and interrupts
subsequently enabled, and it seems to work for me. Doesn't even break
anything too obvious...

Signed-off-by: David S. Miller <davem@davemloft.net>
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