sky2: more receive shutdown

Reset more parts of the receive path when device is take offline.

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/sky2.c

@@ -1151,7 +1151,14 @@ static void sky2_rx_stop(struct sky2_port *sky2)
 
 	/* reset the Rx prefetch unit */
 	sky2_write32(hw, Y2_QADDR(rxq, PREF_UNIT_CTRL), PREF_UNIT_RST_SET);
-	mmiowb();
+
+	/* Reset the RAM Buffer receive queue */
+	sky2_write8(hw, RB_ADDR(rxq, RB_CTRL), RB_RST_SET);
+
+	/* Reset Rx MAC FIFO */
+	sky2_write8(hw, SK_REG(sky2->port, RX_GMF_CTRL_T), GMF_RST_SET);
+
+	sky2_read8(hw, B0_CTST);
 }
 
 /* Clean out receive buffer area, assumes receiver hardware stopped */