[net-next,2/3] net: ethernet: ave: Set initial wol state to disabled
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Message ID 1543478793-13719-3-git-send-email-hayashi.kunihiko@socionext.com
State Accepted
Commit 7200f2e3c9e267d29e2bfa075794339032e0b98e
Headers show
  • Add suspend/resume support for AVE ethernet driver
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Commit Message

Kunihiko Hayashi Nov. 29, 2018, 8:06 a.m. UTC
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@socionext.com>
 drivers/net/ethernet/socionext/sni_ave.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

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diff --git a/drivers/net/ethernet/socionext/sni_ave.c b/drivers/net/ethernet/socionext/sni_ave.c
index 64115b1..ac96fb9 100644
--- a/drivers/net/ethernet/socionext/sni_ave.c
+++ b/drivers/net/ethernet/socionext/sni_ave.c
@@ -1208,9 +1208,13 @@  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);