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authorVivien Didelot <vivien.didelot@savoirfairelinux.com>2015-09-29 14:17:54 -0400
committerDavid S. Miller <davem@davemloft.net>2015-09-29 21:36:01 -0700
commit57a47532c4312159935c98b7f1cf0e62296b9171 (patch)
tree81b53ee9607a5f3f1536b08314bab337f8695012 /net
parent9ae6d4935e3df35a23bbbe531c6b9ff314e7fd0f (diff)
downloadlinux-57a47532c4312159935c98b7f1cf0e62296b9171.tar.bz2
net: dsa: fix preparation of a port STP update
Because of the default 0 value of ret in dsa_slave_port_attr_set, a driver may return -EOPNOTSUPP from the commit phase of a STP state, which triggers a WARN() from switchdev. This happened on a 6185 switch which does not support hardware bridging. Fixes: 3563606258cf ("switchdev: convert STP update to switchdev attr set") Reported-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r--net/dsa/slave.c11
1 files changed, 8 insertions, 3 deletions
diff --git a/net/dsa/slave.c b/net/dsa/slave.c
index cce97385f743..7d91f4612ac0 100644
--- a/net/dsa/slave.c
+++ b/net/dsa/slave.c
@@ -458,12 +458,17 @@ static int dsa_slave_stp_update(struct net_device *dev, u8 state)
static int dsa_slave_port_attr_set(struct net_device *dev,
struct switchdev_attr *attr)
{
- int ret = 0;
+ struct dsa_slave_priv *p = netdev_priv(dev);
+ struct dsa_switch *ds = p->parent;
+ int ret;
switch (attr->id) {
case SWITCHDEV_ATTR_PORT_STP_STATE:
- if (attr->trans == SWITCHDEV_TRANS_COMMIT)
- ret = dsa_slave_stp_update(dev, attr->u.stp_state);
+ if (attr->trans == SWITCHDEV_TRANS_PREPARE)
+ ret = ds->drv->port_stp_update ? 0 : -EOPNOTSUPP;
+ else
+ ret = ds->drv->port_stp_update(ds, p->port,
+ attr->u.stp_state);
break;
default:
ret = -EOPNOTSUPP;