From fcf15367cbd90e5fd6f69d73a1d512fbb7ca2748 Mon Sep 17 00:00:00 2001 From: Vivien Didelot Date: Wed, 12 Jun 2019 12:42:47 -0400 Subject: net: dsa: mv88e6xxx: lock mutex in port_fdb_dump During a port FDB dump operation, the mutex protecting the concurrent access to the switch registers is currently held by the internal mv88e6xxx_port_db_dump and mv88e6xxx_port_db_dump_fid helpers. It must be held at the higher level in mv88e6xxx_port_fdb_dump which is called directly by DSA through ds->ops->port_fdb_dump. Fix this. Signed-off-by: Vivien Didelot Signed-off-by: David S. Miller --- drivers/net/dsa/mv88e6xxx/chip.c | 14 ++++++-------- 1 file changed, 6 insertions(+), 8 deletions(-) (limited to 'drivers/net/dsa/mv88e6xxx') diff --git a/drivers/net/dsa/mv88e6xxx/chip.c b/drivers/net/dsa/mv88e6xxx/chip.c index 4b2f8d6f0744..6691120bd283 100644 --- a/drivers/net/dsa/mv88e6xxx/chip.c +++ b/drivers/net/dsa/mv88e6xxx/chip.c @@ -1767,9 +1767,7 @@ static int mv88e6xxx_port_db_dump_fid(struct mv88e6xxx_chip *chip, eth_broadcast_addr(addr.mac); do { - mutex_lock(&chip->reg_lock); err = mv88e6xxx_g1_atu_getnext(chip, fid, &addr); - mutex_unlock(&chip->reg_lock); if (err) return err; @@ -1802,10 +1800,7 @@ static int mv88e6xxx_port_db_dump(struct mv88e6xxx_chip *chip, int port, int err; /* Dump port's default Filtering Information Database (VLAN ID 0) */ - mutex_lock(&chip->reg_lock); err = mv88e6xxx_port_get_fid(chip, port, &fid); - mutex_unlock(&chip->reg_lock); - if (err) return err; @@ -1815,9 +1810,7 @@ static int mv88e6xxx_port_db_dump(struct mv88e6xxx_chip *chip, int port, /* Dump VLANs' Filtering Information Databases */ do { - mutex_lock(&chip->reg_lock); err = mv88e6xxx_vtu_getnext(chip, &vlan); - mutex_unlock(&chip->reg_lock); if (err) return err; @@ -1837,8 +1830,13 @@ static int mv88e6xxx_port_fdb_dump(struct dsa_switch *ds, int port, dsa_fdb_dump_cb_t *cb, void *data) { struct mv88e6xxx_chip *chip = ds->priv; + int err; + + mutex_lock(&chip->reg_lock); + err = mv88e6xxx_port_db_dump(chip, port, cb, data); + mutex_unlock(&chip->reg_lock); - return mv88e6xxx_port_db_dump(chip, port, cb, data); + return err; } static int mv88e6xxx_bridge_map(struct mv88e6xxx_chip *chip, -- cgit v1.2.3-55-g7522