[PATCH] net: phy: fix uninitalized WOL parameters in phy_ethtool_get_wol

[Sebastian Hesselbarth]

phy_ethtool_get_wol is a helper to get current WOL settings from
a phy device. When using this helper on a PHY without .get_wol
callback, struct ethtool_wolinfo is never set-up correctly and
may contain misleading information about WOL status.

To fix this, always zero relevant fields of struct ethtool_wolinfo
regardless of .get_wol callback availability.

Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@xxxxxxxxx>
---
Cc: David Miller <davem@xxxxxxxxxxxxx>
Cc: Florian Fainelli <f.fainelli@xxxxxxxxx>
Cc: netdev@xxxxxxxxxxxxxxx
Cc: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx
Cc: linux-kernel@xxxxxxxxxxxxxxx
---
 drivers/net/phy/phy.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/phy/phy.c b/drivers/net/phy/phy.c
index 19c9eca0ef26..62a7cd401e1c 100644
--- a/drivers/net/phy/phy.c
+++ b/drivers/net/phy/phy.c
@@ -1092,6 +1092,7 @@ EXPORT_SYMBOL(phy_ethtool_set_wol);
 
 void phy_ethtool_get_wol(struct phy_device *phydev, struct ethtool_wolinfo *wol)
 {
+	wol->supported = wol->wolopts = 0;
 	if (phydev->drv->get_wol)
 		phydev->drv->get_wol(phydev, wol);
 }
-- 
1.8.5.3

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