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| author | Florian Fainelli <f.fainelli@gmail.com> | 2020-02-21 02:34:53 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-03-20 12:54:07 +0300 |
| commit | 139fe35030c33abc54e0cee38a0c50388a38cdd9 (patch) | |
| tree | b99d373a8551af3b9d26632e88b6ff4700d1296a | |
| parent | ffee24cf3053e942fc694ed52d79dbda6e6c01c8 (diff) | |
| download | linux-139fe35030c33abc54e0cee38a0c50388a38cdd9.tar.xz | |
net: phy: Avoid multiple suspends
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>
| -rw-r--r-- | drivers/net/phy/phy_device.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/net/phy/phy_device.c b/drivers/net/phy/phy_device.c index a98c227a4c2e..31ef3e47edf6 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; /* Don't suspend PHY if the attached netdev parent may wakeup. * The parent may point to a PCI device, as in tg3 driver. @@ -106,7 +106,8 @@ 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) |