r8169: workaround against ignored TxPoll writes (8168)

[linux-2.6-omap-h63xx.git] / drivers / net / r8169.c

diff --git a/drivers/net/r8169.c b/drivers/net/r8169.c
index d9bb51bb4b9db17d2264b02713edfa4e5640ea56..c921ec32c232cb265323f9075a2daf27275e188b 100644 (file)
--- a/drivers/net/r8169.c
+++ b/drivers/net/r8169.c
@@ -2570,6 +2570,15 @@ static void rtl8169_tx_interrupt(struct net_device *dev,
                    (TX_BUFFS_AVAIL(tp) >= MAX_SKB_FRAGS)) {
                        netif_wake_queue(dev);
                }
+               /*
+                * 8168 hack: TxPoll requests are lost when the Tx packets are
+                * too close. Let's kick an extra TxPoll request when a burst
+                * of start_xmit activity is detected (if it is not detected,
+                * it is slow enough). -- FR
+                */
+               smp_rmb();
+               if (tp->cur_tx != dirty_tx)
+                       RTL_W8(TxPoll, NPQ);
        }
 }