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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: 719655a149 ("net: phy: Replace phy driver features u32 with link_mode bitmap")
Reported-by: Scott Wood <oss@buserror.net>
Signed-off-by: Camelia Groza <camelia.groza@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Camelia Groza 2019-01-17 14:22:36 +02:00 committed by David S. Miller
parent 7afa81c55f
commit 3e64cf7a43
2 changed files with 7 additions and 2 deletions
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5
drivers/net/phy/phy_device.c
View File

@ -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->mdiodrv.driver.name = new_driver->name;
new_driver->mdiodrv.driver.bus = &mdio_bus_type;

4
include/linux/phy.h
View File

@ -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)
*