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-rw-r--r--net/dsa/master.c34
1 files changed, 33 insertions, 1 deletions
diff --git a/net/dsa/master.c b/net/dsa/master.c
index d7d5145aa235..71bb15f491c8 100644
--- a/net/dsa/master.c
+++ b/net/dsa/master.c
@@ -158,6 +158,27 @@ static void dsa_master_ethtool_teardown(struct net_device *dev)
cpu_dp->orig_ethtool_ops = NULL;
}
+static ssize_t tagging_show(struct device *d, struct device_attribute *attr,
+ char *buf)
+{
+ struct net_device *dev = to_net_dev(d);
+ struct dsa_port *cpu_dp = dev->dsa_ptr;
+
+ return sprintf(buf, "%s\n",
+ dsa_tag_protocol_to_str(cpu_dp->tag_ops));
+}
+static DEVICE_ATTR_RO(tagging);
+
+static struct attribute *dsa_slave_attrs[] = {
+ &dev_attr_tagging.attr,
+ NULL
+};
+
+static const struct attribute_group dsa_group = {
+ .name = "dsa",
+ .attrs = dsa_slave_attrs,
+};
+
static void dsa_master_set_mtu(struct net_device *dev, struct dsa_port *cpu_dp)
{
unsigned int mtu = ETH_DATA_LEN + cpu_dp->tag_ops->overhead;
@@ -186,6 +207,8 @@ static void dsa_master_reset_mtu(struct net_device *dev)
int dsa_master_setup(struct net_device *dev, struct dsa_port *cpu_dp)
{
+ int ret;
+
dsa_master_set_mtu(dev, cpu_dp);
/* If we use a tagging format that doesn't have an ethertype
@@ -196,11 +219,20 @@ int dsa_master_setup(struct net_device *dev, struct dsa_port *cpu_dp)
dev->dsa_ptr = cpu_dp;
- return dsa_master_ethtool_setup(dev);
+ ret = dsa_master_ethtool_setup(dev);
+ if (ret)
+ return ret;
+
+ ret = sysfs_create_group(&dev->dev.kobj, &dsa_group);
+ if (ret)
+ dsa_master_ethtool_teardown(dev);
+
+ return ret;
}
void dsa_master_teardown(struct net_device *dev)
{
+ sysfs_remove_group(&dev->dev.kobj, &dsa_group);
dsa_master_ethtool_teardown(dev);
dsa_master_reset_mtu(dev);