3 files changed, 32 insertions, 3 deletions

diff --git a/drivers/net/ethernet/intel/e1000e/e1000.h b/drivers/net/ethernet/intel/e1000e/e1000.h
index 9fe18d1d53d8..f478a22ed577 100644
--- a/drivers/net/ethernet/intel/e1000e/e1000.h
+++ b/drivers/net/ethernet/intel/e1000e/e1000.h
@@ -309,6 +309,7 @@ struct e1000_adapter {
 	u32 txd_cmd;
 
 	bool detect_tx_hung;
+	bool tx_hang_recheck;
 	u8 tx_timeout_factor;
 
 	u32 tx_int_delay;
diff --git a/drivers/net/ethernet/intel/e1000e/netdev.c b/drivers/net/ethernet/intel/e1000e/netdev.c
index a855db1ad249..4e933d1ab3f1 100644
--- a/drivers/net/ethernet/intel/e1000e/netdev.c
+++ b/drivers/net/ethernet/intel/e1000e/netdev.c
@@ -1030,6 +1030,7 @@ static void e1000_print_hw_hang(struct work_struct *work)
 	struct e1000_adapter *adapter = container_of(work,
 	                                             struct e1000_adapter,
 	                                             print_hang_task);
+	struct net_device *netdev = adapter->netdev;
 	struct e1000_ring *tx_ring = adapter->tx_ring;
 	unsigned int i = tx_ring->next_to_clean;
 	unsigned int eop = tx_ring->buffer_info[i].next_to_watch;
@@ -1041,6 +1042,21 @@ static void e1000_print_hw_hang(struct work_struct *work)
 	if (test_bit(__E1000_DOWN, &adapter->state))
 		return;
 
+	if (!adapter->tx_hang_recheck &&
+	    (adapter->flags2 & FLAG2_DMA_BURST)) {
+		/* May be block on write-back, flush and detect again
+		 * flush pending descriptor writebacks to memory
+		 */
+		ew32(TIDV, adapter->tx_int_delay | E1000_TIDV_FPD);
+		/* execute the writes immediately */
+		e1e_flush();
+		adapter->tx_hang_recheck = true;
+		return;
+	}
+	/* Real hang detected */
+	adapter->tx_hang_recheck = false;
+	netif_stop_queue(netdev);
+
 	e1e_rphy(hw, PHY_STATUS, &phy_status);
 	e1e_rphy(hw, PHY_1000T_STATUS, &phy_1000t_status);
 	e1e_rphy(hw, PHY_EXT_STATUS, &phy_ext_status);
@@ -1154,10 +1170,10 @@ static bool e1000_clean_tx_irq(struct e1000_adapter *adapter)
 		if (tx_ring->buffer_info[i].time_stamp &&
 		    time_after(jiffies, tx_ring->buffer_info[i].time_stamp
 			       + (adapter->tx_timeout_factor * HZ)) &&
-		    !(er32(STATUS) & E1000_STATUS_TXOFF)) {
+		    !(er32(STATUS) & E1000_STATUS_TXOFF))
 			schedule_work(&adapter->print_hang_task);
-			netif_stop_queue(netdev);
-		}
+		else
+			adapter->tx_hang_recheck = false;
 	}
 	adapter->total_tx_bytes += total_tx_bytes;
 	adapter->total_tx_packets += total_tx_packets;
@@ -3782,6 +3798,7 @@ static int e1000_open(struct net_device *netdev)
 
 	e1000_irq_enable(adapter);
 
+	adapter->tx_hang_recheck = false;
 	netif_start_queue(netdev);
 
 	adapter->idle_check = true;
diff --git a/drivers/net/ethernet/marvell/sky2.c b/drivers/net/ethernet/marvell/sky2.c
index 7803efa46eb2..f612b35c08ac 100644
--- a/drivers/net/ethernet/marvell/sky2.c
+++ b/drivers/net/ethernet/marvell/sky2.c
@@ -95,6 +95,10 @@ static int disable_msi = 0;
 module_param(disable_msi, int, 0);
 MODULE_PARM_DESC(disable_msi, "Disable Message Signaled Interrupt (MSI)");
 
+static int legacy_pme = 0;
+module_param(legacy_pme, int, 0);
+MODULE_PARM_DESC(legacy_pme, "Legacy power management");
+
 static DEFINE_PCI_DEVICE_TABLE(sky2_id_table) = {
 	{ PCI_DEVICE(PCI_VENDOR_ID_SYSKONNECT, 0x9000) }, /* SK-9Sxx */
 	{ PCI_DEVICE(PCI_VENDOR_ID_SYSKONNECT, 0x9E00) }, /* SK-9Exx */
@@ -867,6 +871,13 @@ static void sky2_wol_init(struct sky2_port *sky2)
 	/* Disable PiG firmware */
 	sky2_write16(hw, B0_CTST, Y2_HW_WOL_OFF);
 
+	/* Needed by some broken BIOSes, use PCI rather than PCI-e for WOL */
+	if (legacy_pme) {
+		u32 reg1 = sky2_pci_read32(hw, PCI_DEV_REG1);
+		reg1 |= PCI_Y2_PME_LEGACY;
+		sky2_pci_write32(hw, PCI_DEV_REG1, reg1);
+	}
+
 	/* block receiver */
 	sky2_write8(hw, SK_REG(port, RX_GMF_CTRL_T), GMF_RST_SET);
 	sky2_read32(hw, B0_CTST);