diff options
Diffstat (limited to 'drivers/net/mdio')
| -rw-r--r-- | drivers/net/mdio/mdio-mux.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/net/mdio/mdio-mux.c b/drivers/net/mdio/mdio-mux.c index e5dee7ad7c09..fe0e46bd7964 100644 --- a/drivers/net/mdio/mdio-mux.c +++ b/drivers/net/mdio/mdio-mux.c @@ -214,8 +214,10 @@ int mdio_mux_init(struct device *dev, snprintf(cb->mii_bus->id, MII_BUS_ID_SIZE, "%s-%x.%x", cb->mii_bus->name, pb->parent_id, v); cb->mii_bus->parent = dev; - cb->mii_bus->read = mdio_mux_read; - cb->mii_bus->write = mdio_mux_write; + if (parent_bus->read) + cb->mii_bus->read = mdio_mux_read; + if (parent_bus->write) + cb->mii_bus->write = mdio_mux_write; if (parent_bus->read_c45) cb->mii_bus->read_c45 = mdio_mux_read_c45; if (parent_bus->write_c45) |