af_iucv: consider state IUCV_CLOSING when closing a socket
Make sure a second invocation of iucv_sock_close() guarantees proper freeing of an iucv path. Signed-off-by: NUrsula Braun <ursula.braun@de.ibm.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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