Commit 3e64cf7a authored by Camelia Groza's avatar Camelia Groza Committed by David S. Miller
Browse files

net: phy: phy driver features are mandatory

Since phy driver features became a link_mode bitmap, phy drivers that
don't have a list of features configured will cause the kernel to crash
when probed.

Prevent the phy driver from registering if the features field is missing.

Fixes: 719655a1

 ("net: phy: Replace phy driver features u32 with link_mode bitmap")
Reported-by: default avatarScott Wood <>
Signed-off-by: default avatarCamelia Groza <>
Signed-off-by: default avatarDavid S. Miller <>
parent 7afa81c5
......@@ -2255,6 +2255,11 @@ int phy_driver_register(struct phy_driver *new_driver, struct module *owner)
int retval;
if (WARN_ON(!new_driver->features)) {
pr_err("%s: Driver features are missing\n", new_driver->name);
return -EINVAL;
new_driver->mdiodrv.flags |= MDIO_DEVICE_IS_PHY;
new_driver-> = new_driver->name;
new_driver->mdiodrv.driver.bus = &mdio_bus_type;
......@@ -469,8 +469,8 @@ struct phy_device {
* only works for PHYs with IDs which match this field
* name: The friendly name of this PHY type
* phy_id_mask: Defines the important bits of the phy_id
* features: A list of features (speed, duplex, etc) supported
* by this PHY
* features: A mandatory list of features (speed, duplex, etc)
* supported by this PHY
* flags: A bitfield defining certain other features this PHY
* supports (like interrupts)
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