IB/ipoib: Move all uninit code into ndo_uninit

Currently uninit is sometimes done twice in error flows, and is sprinkled
a bit all over the place.

Improve the clarity of the design by moving all uninit only into
ndo_uinit.

Some duplication is removed:
 - Sometimes IPOIB_STOP_NEIGH_GC was done before unregister, but
   this duplicates the process in ipoib_neigh_hash_init
 - Flushing priv->wq was sometimes done before unregister,
   but that duplicates what has been done in ndo_uninit

Uniniting the IB event queue must remain before unregister_netdev as it
requires the RTNL lock to be dropped, this is moved to a helper to make
that flow really clear and remove some duplication in error flows.

If register_netdev fails (and ndo_init is NULL) then it almost always
calls ndo_uninit, which lets us remove all the extra code from the error
unwinds. The next patch in the series will close the 'almost always' hole
by pairing a proper ndo_init with ndo_uninit.

Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>

1 files changed, 1 insertions, 4 deletions

diff --git a/drivers/infiniband/ulp/ipoib/ipoib_vlan.c b/drivers/infiniband/ulp/ipoib/ipoib_vlan.c
index 1b7bfd500893..b62ab85c8ead 100644
--- a/drivers/infiniband/ulp/ipoib/ipoib_vlan.c
+++ b/drivers/infiniband/ulp/ipoib/ipoib_vlan.c
@@ -83,7 +83,7 @@ int __ipoib_vlan_add(struct ipoib_dev_priv *ppriv, struct ipoib_dev_priv *priv,
 	result = register_netdevice(priv->dev);
 	if (result) {
 		ipoib_warn(priv, "failed to initialize; error %i", result);
-		goto register_failed;
+		goto err;
 	}
 
 	/* RTNL childs don't need proprietary sysfs entries */
@@ -108,9 +108,6 @@ sysfs_failed:
 	result = -ENOMEM;
 	unregister_netdevice(priv->dev);
 
-register_failed:
-	ipoib_dev_cleanup(priv->dev);
-
 err:
 	return result;
 }