[netdrvr r8169] Barrier against compiler optimization.

diff --git a/drivers/net/r8169.c b/drivers/net/r8169.c
index 22812ac6c06cca561976e401ff4328ccc3761054..331edcf1c890c5dddeb2e133ca11fb184fdcd26a 100644 (file)
--- a/drivers/net/r8169.c
+++ b/drivers/net/r8169.c
@@ -1369,6 +1369,7 @@ rtl8169_tx_interrupt(struct net_device *dev, struct rtl8169_private *tp,
        while (tx_left > 0) {
                int entry = dirty_tx % NUM_TX_DESC;
 
+               rmb();
                if (!(le32_to_cpu(tp->TxDescArray[entry].status) & OWNbit)) {
                        struct sk_buff *skb = tp->Tx_skbuff[entry];
 
@@ -1430,7 +1431,10 @@ rtl8169_rx_interrupt(struct net_device *dev, struct rtl8169_private *tp,
 
        while (rx_left > 0) {
                int entry = cur_rx % NUM_RX_DESC;
-               u32 status = le32_to_cpu(tp->RxDescArray[entry].status);
+               u32 status;
+
+               rmb();
+               status = le32_to_cpu(tp->RxDescArray[entry].status);
 
                if (status & OWNbit)
                        break;