The following patches fix the issues where the userspace daemon has crashed and left netlink requests dangling. The daemon can now block the interface, kill outstanding requests, reopen the netlink socket and then unblock and execute new requests. The patches were made over Martin's for-next branch. v2: - Return BUSY error immediately when there is a running command. - Fix nl skb leak when device is blocked. - Fix check for valid block_netlink input. - Break out nl code cleanup into separate patch.
