cxgb3: fix hot plug removal crash

commit a6f018e3 upstream.

queue restart tasklets need to be stopped after napi handlers are stopped
since the latter can restart them.  So stop them after stopping napi.
Signed-off-by: Divy Le Ray <divy@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Brandon Philips <bphilips@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/net/cxgb3/cxgb3_main.c

@@ -1274,6 +1274,7 @@ static void cxgb_down(struct adapter *adapter)
 
 	free_irq_resources(adapter);
 	quiesce_rx(adapter);
+	t3_sge_stop(adapter);
 	flush_workqueue(cxgb3_wq);	/* wait for external IRQ handler */
 }