4.20-stable review patch. If anyone has any objections, please let me know.
------------------
[ Upstream commit 7200f2e3c9e267d29e2bfa075794339032e0b98e ]
If wol state of phy hardware is enabled after reset, phy_ethtool_get_wol()
returns that wol.wolopts is true.
However, since net_device.wol_enabled is zero and this doesn't apply wol
state until calling ethtool_set_wol(), so mdio_bus_phy_may_suspend()
returns true, that is, it's in a state where phy can suspend even though
wol state is enabled.
In this inconsistency, phy_suspend() returns -EBUSY, and at last,
suspend sequence fails with the following message:
dpm_run_callback(): mdio_bus_phy_suspend+0x0/0x58 returns -16
PM: Device 65000000.ethernet-ffffffff:01 failed to suspend: error -16
PM: Some devices failed to suspend, or early wake event detected
In order to fix the above issue, this patch forces to set initial wol state
to disabled as default.
Signed-off-by: Kunihiko Hayashi <hayashi.kunihiko@xxxxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/net/ethernet/socionext/sni_ave.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/socionext/sni_ave.c b/drivers/net/ethernet/socionext/sni_ave.c
index 7c7cd9d94bcc..3d0114ba2bfe 100644
--- a/drivers/net/ethernet/socionext/sni_ave.c
+++ b/drivers/net/ethernet/socionext/sni_ave.c
@@ -1210,9 +1210,13 @@ static int ave_init(struct net_device *ndev)
priv->phydev = phydev;
- phy_ethtool_get_wol(phydev, &wol);
+ ave_ethtool_get_wol(ndev, &wol);
device_set_wakeup_capable(&ndev->dev, !!wol.supported);
+ /* set wol initial state disabled */
+ wol.wolopts = 0;
+ ave_ethtool_set_wol(ndev, &wol);
+
if (!phy_interface_is_rgmii(phydev))
phy_set_max_speed(phydev, SPEED_100);
--
2.19.1
