diff options
Diffstat (limited to 'drivers/net/phy/mdio_bus.c')
| -rw-r--r-- | drivers/net/phy/mdio_bus.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/net/phy/mdio_bus.c b/drivers/net/phy/mdio_bus.c index a6bcb0fee863..fda2e27c1810 100644 --- a/drivers/net/phy/mdio_bus.c +++ b/drivers/net/phy/mdio_bus.c @@ -445,6 +445,9 @@ int __mdiobus_read(struct mii_bus *bus, int addr, u32 regnum) lockdep_assert_held_once(&bus->mdio_lock); + if (addr >= PHY_MAX_ADDR) + return -ENXIO; + if (bus->read) retval = bus->read(bus, addr, regnum); else @@ -474,6 +477,9 @@ int __mdiobus_write(struct mii_bus *bus, int addr, u32 regnum, u16 val) lockdep_assert_held_once(&bus->mdio_lock); + if (addr >= PHY_MAX_ADDR) + return -ENXIO; + if (bus->write) err = bus->write(bus, addr, regnum, val); else @@ -535,6 +541,9 @@ int __mdiobus_c45_read(struct mii_bus *bus, int addr, int devad, u32 regnum) lockdep_assert_held_once(&bus->mdio_lock); + if (addr >= PHY_MAX_ADDR) + return -ENXIO; + if (bus->read_c45) retval = bus->read_c45(bus, addr, devad, regnum); else @@ -566,6 +575,9 @@ int __mdiobus_c45_write(struct mii_bus *bus, int addr, int devad, u32 regnum, lockdep_assert_held_once(&bus->mdio_lock); + if (addr >= PHY_MAX_ADDR) + return -ENXIO; + if (bus->write_c45) err = bus->write_c45(bus, addr, devad, regnum, val); else |