[PATCH 03/11] net: phy: Check against net_device being NULL

[Ioana Ciornei]

In general, we don't want MAC drivers calling phy_attach_direct with the
net_device being NULL. Add checks against this in all the functions
calling it: phy_attach() and phy_connect_direct().

Signed-off-by: Ioana Ciornei <ioana.cior...@nxp.com>
Suggested-by: Andrew Lunn <and...@lunn.ch>
---
 drivers/net/phy/phy_device.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/net/phy/phy_device.c b/drivers/net/phy/phy_device.c
index da3bf3f70d63..0b7730fd41ba 100644
--- a/drivers/net/phy/phy_device.c
+++ b/drivers/net/phy/phy_device.c
@@ -948,6 +948,9 @@ int phy_connect_direct(struct net_device *dev, struct 
phy_device *phydev,
 {
        int rc;
 
+       if (!dev)
+               return ERR_PTR(-EINVAL);
+
        rc = phy_attach_direct(dev, phydev, phydev->dev_flags, interface);
        if (rc)
                return rc;
@@ -1307,6 +1310,9 @@ struct phy_device *phy_attach(struct net_device *dev, 
const char *bus_id,
        struct device *d;
        int rc;
 
+       if (!dev)
+               return ERR_PTR(-EINVAL);
+
        /* Search the list of PHY devices on the mdio bus for the
         * PHY with the requested name
         */
-- 
2.21.0