From 027f426d547967cd1b6899597367aa64af51c28e Mon Sep 17 00:00:00 2001 From: Benjamin Herrenschmidt <benh@kernel.crashing.org> Date: Thu, 6 Apr 2017 11:02:50 +1000 Subject: [PATCH] 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> --- drivers/net/ethernet/faraday/ftgmac100.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/net/ethernet/faraday/ftgmac100.c b/drivers/net/ethernet/faraday/ftgmac100.c index 5cd854e740a9c..535e8a00d404b 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)))