From: Heiner Kallweit hkallweit1@gmail.com
[ Upstream commit 16983507742cbcaa5592af530872a82e82fb9c51 ]
If we have scenarios like
mdiobus_register() -> loads PHY driver module(s) -> registers PHY driver(s) -> may schedule async probe phydev = mdiobus_get_phy() <phydev action involving PHY driver>
or
phydev = phy_device_create() -> loads PHY driver module -> registers PHY driver -> may schedule async probe <phydev action involving PHY driver>
then we expect the PHY driver to be bound to the phydev when triggering the action. This may not be the case in case of asynchronous probing. Therefore ensure that PHY drivers are probed synchronously.
Default still is sync probing, except async probing is explicitly requested. I saw some comments that the intention is to promote async probing for more parallelism in boot process and want to be prepared for the case that the default is changed to async probing.
Signed-off-by: Heiner Kallweit hkallweit1@gmail.com Reviewed-by: Florian Fainelli f.fainelli@gmail.com Reviewed-by: Andrew Lunn andrew@lunn.ch Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/net/phy/phy_device.c | 1 + 1 file changed, 1 insertion(+)
diff --git a/drivers/net/phy/phy_device.c b/drivers/net/phy/phy_device.c index 302d183beb9e8..9ae121cb6dc11 100644 --- a/drivers/net/phy/phy_device.c +++ b/drivers/net/phy/phy_device.c @@ -1939,6 +1939,7 @@ int phy_driver_register(struct phy_driver *new_driver, struct module *owner) new_driver->mdiodrv.driver.probe = phy_probe; new_driver->mdiodrv.driver.remove = phy_remove; new_driver->mdiodrv.driver.owner = owner; + new_driver->mdiodrv.driver.probe_type = PROBE_FORCE_SYNCHRONOUS;
/* The following works around an issue where the PHY driver doesn't bind * to the device, resulting in the genphy driver being used instead of