Merge branch 's390-qeth-fixes'

Julian Wiedmann says:

====================
s390/qeth: fixes 2019-02-04

please apply the following four fixes to -net.

Patch 1 takes care of a common resource leak in various error paths, while the
second patch fixes a misordered kfree when cleaning up after an error.
The other two patches ensure that there's no stale work dangling on workqueues
when the qeth device has already been offlined and/or removed.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>