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r8169: fix failing WoL

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Th referenced change added an extra hw reset to rtl8169_net_suspend()
what makes WoL fail on few chip versions. Therefore skip the extra
reset if we're going down and WoL is enabled.
In rtl_shutdown() rtl8169_hw_reset() is called by rtl8169_net_suspend()
already if needed, therefore avoid issues issue by removing the extra
call. The fix was tested on a system with RTL8168g.

Meanwhile rtl8169_hw_reset() does more than a hw reset and should be
renamed. But that's net-next material.

Fixes: 8ac8e8c64b ("r8169: make rtl8169_down central chip quiesce function")
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Heiner Kallweit 2020-06-03 22:29:06 +02:00 committed by David S. Miller
parent f6c1fb0a76
commit 1200684814
1 changed files with 7 additions and 6 deletions
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13
drivers/net/ethernet/realtek/r8169_main.c
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@ -3928,7 +3928,7 @@ static void rtl8169_tx_clear(struct rtl8169_private *tp)
netdev_reset_queue(tp->dev);
}
static void rtl8169_hw_reset(struct rtl8169_private *tp)
static void rtl8169_hw_reset(struct rtl8169_private *tp, bool going_down)
{
/* Give a racing hard_start_xmit a few cycles to complete. */
synchronize_rcu();
@ -3938,6 +3938,9 @@ static void rtl8169_hw_reset(struct rtl8169_private *tp)
rtl_rx_close(tp);
if (going_down && tp->dev->wol_enabled)
goto no_reset;
switch (tp->mac_version) {
case RTL_GIGA_MAC_VER_27:
case RTL_GIGA_MAC_VER_28:
@ -3959,7 +3962,7 @@ static void rtl8169_hw_reset(struct rtl8169_private *tp)
}
rtl_hw_reset(tp);
no_reset:
rtl8169_tx_clear(tp);
rtl8169_init_ring_indexes(tp);
}
@ -3972,7 +3975,7 @@ static void rtl_reset_work(struct rtl8169_private *tp)
napi_disable(&tp->napi);
netif_stop_queue(dev);
rtl8169_hw_reset(tp);
rtl8169_hw_reset(tp, false);
for (i = 0; i < NUM_RX_DESC; i++)
rtl8169_mark_to_asic(tp->RxDescArray + i);
@ -4637,7 +4640,7 @@ static void rtl8169_down(struct rtl8169_private *tp)
phy_stop(tp->phydev);
napi_disable(&tp->napi);
rtl8169_hw_reset(tp);
rtl8169_hw_reset(tp, true);
rtl_pll_power_down(tp);
@ -4942,8 +4945,6 @@ static void rtl_shutdown(struct pci_dev *pdev)
/* Restore original MAC address */
rtl_rar_set(tp, tp->dev->perm_addr);
rtl8169_hw_reset(tp);
if (system_state == SYSTEM_POWER_OFF) {
if (tp->saved_wolopts) {
rtl_wol_suspend_quirk(tp);