[PATCH net v3.16]r8169: Remove unsupported command on pci express

[Corcodel Marian]

 On pci express not support latency timer.For more info read file 
/drivers/pci/pci.c
 on pcibios_set_master function.

Signed-off-by: Corcodel Marian <a...@marian1000.go.ro>
---
 drivers/net/ethernet/realtek/r8169.c | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/realtek/r8169.c 
b/drivers/net/ethernet/realtek/r8169.c
index 41750df..02aec96 100644
--- a/drivers/net/ethernet/realtek/r8169.c
+++ b/drivers/net/ethernet/realtek/r8169.c
@@ -753,6 +753,7 @@ struct rtl8169_private {
        struct ring_info tx_skb[NUM_TX_DESC];   /* Tx data buffers */
        struct timer_list timer;
        u16 cp_cmd;
+       bool pcie;
 
        u16 event_slow;
 
@@ -3757,8 +3758,8 @@ static void rtl8169_init_phy(struct net_device *dev, 
struct rtl8169_private *tp)
                dprintk("Set MAC Reg C+CR Offset 0x82h = 0x01h\n");
                RTL_W8(0x82, 0x01);
        }
-
-       pci_write_config_byte(tp->pci_dev, PCI_LATENCY_TIMER, 0x40);
+       if (tp->pcie == 0)
+               pci_write_config_byte(tp->pci_dev, PCI_LATENCY_TIMER, 0x40);
 
        if (tp->mac_version <= RTL_GIGA_MAC_VER_06)
                pci_write_config_byte(tp->pci_dev, PCI_CACHE_LINE_SIZE, 0x08);
@@ -7083,8 +7084,11 @@ rtl_init_one(struct pci_dev *pdev, const struct 
pci_device_id *ent)
        }
        tp->mmio_addr = ioaddr;
 
-       if (!pci_is_pcie(pdev))
+       if (!pci_is_pcie(pdev)) {
                netif_info(tp, probe, dev, "not PCI Express\n");
+               tp->pcie = 0;
+       } else
+               tp->pcie = 1;
 
        /* Identify chip attached to board */
        rtl8169_get_mac_version(tp, dev, cfg->default_ver);
-- 
2.1.4