e1000e: don't clean Rx ring while resetting

When using legacy interrupts, do not clean the Rx ring while resetting
otherwise traffic will not pass.
Signed-off-by: Bruce Allan <bruce.w.allan@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/e1000e/netdev.c

@@ -1176,7 +1176,7 @@ static irqreturn_t e1000_intr(int irq, void *data)
 	struct e1000_hw *hw = &adapter->hw;
 	u32 rctl, icr = er32(ICR);
 
-	if (!icr)
+	if (!icr || test_bit(__E1000_DOWN, &adapter->state))
 		return IRQ_NONE;  /* Not our interrupt */
 
 	/*