diff --git a/drivers/net/phy/phy_device.c b/drivers/net/phy/phy_device.c index bfce8b893644..68691c487eee 100644 --- a/drivers/net/phy/phy_device.c +++ b/drivers/net/phy/phy_device.c @@ -1728,8 +1728,8 @@ static void phy_detach_internal(struct phy_device *phydev, bool notify_bus) phydev->phy_link_change = NULL; phydev->phylink = NULL; - if (phydev->mdio.dev.driver) - module_put(phydev->mdio.dev.driver->owner); + module_put(phydev->drv_owner); + phydev->drv_owner = NULL; /* If the device had no specific driver before (i.e. - it * was using the generic driver), we unbind the device @@ -1794,6 +1794,7 @@ int phy_attach_direct(struct net_device *dev, struct phy_device *phydev, struct mii_bus *bus = phydev->mdio.bus; struct device *d = &phydev->mdio.dev; struct module *ndev_owner = NULL; + struct module *drv_owner; int irq = phydev->irq; int err; @@ -1811,6 +1812,13 @@ int phy_attach_direct(struct net_device *dev, struct phy_device *phydev, get_device(d); + /* Set by every attach, with or without a netdev */ + if (phydev->phy_link_change) { + phydev_err(phydev, "PHY already attached\n"); + err = -EBUSY; + goto error_put_device; + } + /* Assume that if there is no driver, that it doesn't * exist, and we should use the genphy driver. */ @@ -1823,11 +1831,13 @@ int phy_attach_direct(struct net_device *dev, struct phy_device *phydev, phydev->is_genphy_driven = 1; } - if (!try_module_get(d->driver->owner)) { + drv_owner = d->driver->owner; + if (!try_module_get(drv_owner)) { phydev_err(phydev, "failed to get the device driver module\n"); err = -EIO; goto error_put_device; } + phydev->drv_owner = drv_owner; if (phydev->is_genphy_driven) { err = d->driver->probe(d); @@ -1838,12 +1848,6 @@ int phy_attach_direct(struct net_device *dev, struct phy_device *phydev, goto error_module_put; } - if (phydev->attached_dev) { - dev_err(&dev->dev, "PHY already attached\n"); - err = -EBUSY; - goto error; - } - phydev->phy_link_change = phy_link_change; if (dev) { phydev->attached_dev = dev; @@ -1941,7 +1945,8 @@ int phy_attach_direct(struct net_device *dev, struct phy_device *phydev, return err; error_module_put: - module_put(d->driver->owner); + module_put(phydev->drv_owner); + phydev->drv_owner = NULL; phydev->irq = irq; phydev->is_genphy_driven = 0; d->driver = NULL; diff --git a/include/linux/phy.h b/include/linux/phy.h index 7c5098a0dd6c..a5a419bc400e 100644 --- a/include/linux/phy.h +++ b/include/linux/phy.h @@ -578,6 +578,7 @@ struct phy_oatc14_sqi_capability { * * @mdio: MDIO bus this PHY is on * @drv: Pointer to the driver for this PHY instance + * @drv_owner: Driver module phy_attach_direct() took a reference on * @devlink: Create a link between phy dev and mac dev, if the external phy * used by current mac interface is managed by another mac interface. * @phyindex: Unique id across the phy's parent tree of phys to address the PHY @@ -689,6 +690,7 @@ struct phy_device { /* Information about the PHY type */ /* And management functions */ const struct phy_driver *drv; + struct module *drv_owner; struct device_link *devlink;