ftgmac100: Add missing barrier in ftgmac100_rx_packet()
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/ethernet/faraday/ftgmac100.c b/drivers/net/ethernet/faraday/ftgmac100.c
index 5cd854e..535e8a0 100644
--- a/drivers/net/ethernet/faraday/ftgmac100.c
+++ b/drivers/net/ethernet/faraday/ftgmac100.c
@@ -444,6 +444,9 @@ static bool ftgmac100_rx_packet(struct ftgmac100 *priv, int *processed)
if (!ftgmac100_rxdes_packet_ready(rxdes))
return false;
+ /* Order subsequent reads with the test for the ready bit */
+ dma_rmb();
+
/* We don't cope with fragmented RX packets */
if (unlikely(!ftgmac100_rxdes_first_segment(rxdes) ||
!ftgmac100_rxdes_last_segment(rxdes)))