[PATCH net] net: dsa: Unregister slave_dev in error path

[Florian Fainelli]

With commit 0071f56e46da ("dsa: Register netdev before phy"), we are now trying
to unregister a network device that has been previously registered, and in case
of errors, this will make us hit the BUG_ON(dev->reg_state !=
NETREG_UNREGISTERED) condition.

Fix this by adding a missing unregister_netdev() before free_netdev().

Fixes: 0071f56e46da ("dsa: Register netdev before phy")
Signed-off-by: Florian Fainelli <f.faine...@gmail.com>
---
 net/dsa/slave.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/net/dsa/slave.c b/net/dsa/slave.c
index 40b9ca7..e685042 100644
--- a/net/dsa/slave.c
+++ b/net/dsa/slave.c
@@ -1205,6 +1205,7 @@ int dsa_slave_create(struct dsa_switch *ds, struct device 
*parent,
        ret = dsa_slave_phy_setup(p, slave_dev);
        if (ret) {
                netdev_err(master, "error %d setting up slave phy\n", ret);
+               unregister_netdev(slave_dev);
                free_netdev(slave_dev);
                return ret;
        }
-- 
1.7.1