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authorHeiner Kallweit <hkallweit1@gmail.com>2020-10-01 08:44:19 +0200
committerDavid S. Miller <davem@davemloft.net>2020-10-01 12:35:21 -0700
commitbb13a800620c2b9046187facdf7dfd45699f5a74 (patch)
tree67dafc03888db8645588e7531e48db49af1a7bec /drivers
parenta59cf619787e628b31c310367f869fde26c8ede1 (diff)
r8169: fix handling ether_clk
Petr reported that system freezes on r8169 driver load on a system using ether_clk. The original change was done under the assumption that the clock isn't needed for basic operations like chip register access. But obviously that was wrong. Therefore effectively revert the original change, and in addition leave the clock active when suspending and WoL is enabled. Chip may not be able to process incoming packets otherwise. Fixes: 9f0b54cd1672 ("r8169: move switching optional clock on/off to pll power functions") Reported-by: Petr Tesarik <ptesarik@suse.cz> Tested-by: Petr Tesarik <ptesarik@suse.cz> Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com> Reviewed-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/net/ethernet/realtek/r8169_main.c32
1 files changed, 19 insertions, 13 deletions
diff --git a/drivers/net/ethernet/realtek/r8169_main.c b/drivers/net/ethernet/realtek/r8169_main.c
index 5e867da1aad3..4ae1a6fbf0ba 100644
--- a/drivers/net/ethernet/realtek/r8169_main.c
+++ b/drivers/net/ethernet/realtek/r8169_main.c
@@ -2239,14 +2239,10 @@ static void rtl_pll_power_down(struct rtl8169_private *tp)
default:
break;
}
-
- clk_disable_unprepare(tp->clk);
}
static void rtl_pll_power_up(struct rtl8169_private *tp)
{
- clk_prepare_enable(tp->clk);
-
switch (tp->mac_version) {
case RTL_GIGA_MAC_VER_25 ... RTL_GIGA_MAC_VER_33:
case RTL_GIGA_MAC_VER_37:
@@ -4826,29 +4822,39 @@ static void rtl8169_net_suspend(struct rtl8169_private *tp)
#ifdef CONFIG_PM
+static int rtl8169_net_resume(struct rtl8169_private *tp)
+{
+ rtl_rar_set(tp, tp->dev->dev_addr);
+
+ if (tp->TxDescArray)
+ rtl8169_up(tp);
+
+ netif_device_attach(tp->dev);
+
+ return 0;
+}
+
static int __maybe_unused rtl8169_suspend(struct device *device)
{
struct rtl8169_private *tp = dev_get_drvdata(device);
rtnl_lock();
rtl8169_net_suspend(tp);
+ if (!device_may_wakeup(tp_to_dev(tp)))
+ clk_disable_unprepare(tp->clk);
rtnl_unlock();
return 0;
}
-static int rtl8169_resume(struct device *device)
+static int __maybe_unused rtl8169_resume(struct device *device)
{
struct rtl8169_private *tp = dev_get_drvdata(device);
- rtl_rar_set(tp, tp->dev->dev_addr);
-
- if (tp->TxDescArray)
- rtl8169_up(tp);
+ if (!device_may_wakeup(tp_to_dev(tp)))
+ clk_prepare_enable(tp->clk);
- netif_device_attach(tp->dev);
-
- return 0;
+ return rtl8169_net_resume(tp);
}
static int rtl8169_runtime_suspend(struct device *device)
@@ -4874,7 +4880,7 @@ static int rtl8169_runtime_resume(struct device *device)
__rtl8169_set_wol(tp, tp->saved_wolopts);
- return rtl8169_resume(device);
+ return rtl8169_net_resume(tp);
}
static int rtl8169_runtime_idle(struct device *device)