diff options
| author | Andrew Lunn <andrew@lunn.ch> | 2017-12-07 01:05:57 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-12-07 13:53:05 -0500 |
| commit | 3126aeec5313565bfa19e2dd8fd7e3c3390514cb (patch) | |
| tree | 542764a7424158766550b4f7915f70aa955b8964 | |
| parent | 3d5fdba1842bdd2eef29364c660558cb4cbb3fe0 (diff) | |
| download | linux-3126aeec5313565bfa19e2dd8fd7e3c3390514cb.tar.bz2 | |
net: dsa: mv88e6xxx: Unregister MDIO bus on error path
The MDIO busses need to be unregistered before they are freed,
otherwise BUG() is called. Add a call to the unregister code if the
registration fails, since we can have multiple busses, of which some
may correctly register before one fails. This requires moving the code
around a little.
Fixes: a3c53be55c95 ("net: dsa: mv88e6xxx: Support multiple MDIO busses")
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | drivers/net/dsa/mv88e6xxx/chip.c | 30 |
1 files changed, 16 insertions, 14 deletions
diff --git a/drivers/net/dsa/mv88e6xxx/chip.c b/drivers/net/dsa/mv88e6xxx/chip.c index 70004264f60d..66d33e97cbc5 100644 --- a/drivers/net/dsa/mv88e6xxx/chip.c +++ b/drivers/net/dsa/mv88e6xxx/chip.c @@ -2177,6 +2177,19 @@ static const struct of_device_id mv88e6xxx_mdio_external_match[] = { { }, }; +static void mv88e6xxx_mdios_unregister(struct mv88e6xxx_chip *chip) + +{ + struct mv88e6xxx_mdio_bus *mdio_bus; + struct mii_bus *bus; + + list_for_each_entry(mdio_bus, &chip->mdios, list) { + bus = mdio_bus->bus; + + mdiobus_unregister(bus); + } +} + static int mv88e6xxx_mdios_register(struct mv88e6xxx_chip *chip, struct device_node *np) { @@ -2201,27 +2214,16 @@ static int mv88e6xxx_mdios_register(struct mv88e6xxx_chip *chip, match = of_match_node(mv88e6xxx_mdio_external_match, child); if (match) { err = mv88e6xxx_mdio_register(chip, child, true); - if (err) + if (err) { + mv88e6xxx_mdios_unregister(chip); return err; + } } } return 0; } -static void mv88e6xxx_mdios_unregister(struct mv88e6xxx_chip *chip) - -{ - struct mv88e6xxx_mdio_bus *mdio_bus; - struct mii_bus *bus; - - list_for_each_entry(mdio_bus, &chip->mdios, list) { - bus = mdio_bus->bus; - - mdiobus_unregister(bus); - } -} - static int mv88e6xxx_get_eeprom_len(struct dsa_switch *ds) { struct mv88e6xxx_chip *chip = ds->priv; |