r8169: Align ASPM/CLKREQ setting function with vendor driver

There's a small delay after setting ASPM in vendor drivers, r8101 and
r8168.
In addition, those drivers enable ASPM before ClkReq, also change that
to align with vendor driver.

I haven't seen anything bad becasue of this, but I think it's better to
keep in sync with vendor driver.

Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 3 insertions, 1 deletions

diff --git a/drivers/net/ethernet/realtek/r8169.c b/drivers/net/ethernet/realtek/r8169.c
index 1d8631303b53..8195b1f5036d 100644
--- a/drivers/net/ethernet/realtek/r8169.c
+++ b/drivers/net/ethernet/realtek/r8169.c
@@ -4775,12 +4775,14 @@ static void rtl_pcie_state_l2l3_enable(struct rtl8169_private *tp, bool enable)
 static void rtl_hw_aspm_clkreq_enable(struct rtl8169_private *tp, bool enable)
 {
         if (enable) {
-                RTL_W8(tp, Config2, RTL_R8(tp, Config2) | ClkReqEn);
                 RTL_W8(tp, Config5, RTL_R8(tp, Config5) | ASPM_en);
+                RTL_W8(tp, Config2, RTL_R8(tp, Config2) | ClkReqEn);
         } else {
                 RTL_W8(tp, Config2, RTL_R8(tp, Config2) & ~ClkReqEn);
                 RTL_W8(tp, Config5, RTL_R8(tp, Config5) & ~ASPM_en);
         }
+
+        udelay(10);
 }
 
 static void rtl_hw_start_8168bb(struct rtl8169_private *tp)