From: Lukas Wunner lukas@wunner.de
[ Upstream commit ea64cdfad124922c931633e39287c5a31a9b14a1 ]
Commit 744d23c71af3 ("net: phy: Warn about incorrect mdio_bus_phy_resume() state") introduced a WARN() on resume from system sleep if a PHY is not in PHY_HALTED state.
Commit 6dbe852c379f ("net: phy: Don't WARN for PHY_READY state in mdio_bus_phy_resume()") added an exemption for PHY_READY state from the WARN().
It turns out PHY_UP state needs to be exempted as well because the following may happen on suspend:
mdio_bus_phy_suspend() phy_stop_machine() phydev->state = PHY_UP # if (phydev->state >= PHY_UP)
Fixes: 744d23c71af3 ("net: phy: Warn about incorrect mdio_bus_phy_resume() state") Reported-by: Marek Szyprowski m.szyprowski@samsung.com Tested-by: Marek Szyprowski m.szyprowski@samsung.com Link: https://lore.kernel.org/netdev/2b1a1588-505e-dff3-301d-bfc1fb14d685@samsung.... Signed-off-by: Lukas Wunner lukas@wunner.de Acked-by: Florian Fainelli f.fainelli@gmail.com Cc: Xiaolei Wang xiaolei.wang@windriver.com Link: https://lore.kernel.org/r/8128fdb51eeebc9efbf3776a4097363a1317aaf1.166390557... Signed-off-by: Paolo Abeni pabeni@redhat.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/net/phy/phy_device.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-)
diff --git a/drivers/net/phy/phy_device.c b/drivers/net/phy/phy_device.c index b616f55ea222..c5b92ffaffb9 100644 --- a/drivers/net/phy/phy_device.c +++ b/drivers/net/phy/phy_device.c @@ -315,11 +315,13 @@ static __maybe_unused int mdio_bus_phy_resume(struct device *dev)
phydev->suspended_by_mdio_bus = 0;
- /* If we manged to get here with the PHY state machine in a state neither - * PHY_HALTED nor PHY_READY this is an indication that something went wrong - * and we should most likely be using MAC managed PM and we are not. + /* If we managed to get here with the PHY state machine in a state + * neither PHY_HALTED, PHY_READY nor PHY_UP, this is an indication + * that something went wrong and we should most likely be using + * MAC managed PM, but we are not. */ - WARN_ON(phydev->state != PHY_HALTED && phydev->state != PHY_READY); + WARN_ON(phydev->state != PHY_HALTED && phydev->state != PHY_READY && + phydev->state != PHY_UP);
ret = phy_init_hw(phydev); if (ret < 0)