From: Florian Fainelli f.fainelli@gmail.com
commit 503ba7c6961034ff0047707685644cad9287c226 upstream.
It is currently possible for a PHY device to be suspended as part of a network device driver's suspend call while it is still being attached to that net_device, either via phy_suspend() or implicitly via phy_stop().
Later on, when the MDIO bus controller get suspended, we would attempt to suspend again the PHY because it is still attached to a network device.
This is both a waste of time and creates an opportunity for improper clock/power management bugs to creep in.
Fixes: 803dd9c77ac3 ("net: phy: avoid suspending twice a PHY") Signed-off-by: Florian Fainelli f.fainelli@gmail.com Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Signed-off-by: Yang Yingliang yangyingliang@huawei.com --- drivers/net/phy/phy_device.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/drivers/net/phy/phy_device.c b/drivers/net/phy/phy_device.c index 558164e..f9c542a 100644 --- a/drivers/net/phy/phy_device.c +++ b/drivers/net/phy/phy_device.c @@ -91,7 +91,7 @@ static bool mdio_bus_phy_may_suspend(struct phy_device *phydev) * MDIO bus driver and clock gated at this point. */ if (!netdev) - return !phydev->suspended; + goto out;
if (netdev->wol_enabled) return false; @@ -111,7 +111,8 @@ static bool mdio_bus_phy_may_suspend(struct phy_device *phydev) if (device_may_wakeup(&netdev->dev)) return false;
- return true; +out: + return !phydev->suspended; }
static int mdio_bus_phy_suspend(struct device *dev)