[stable 4.8] xprtrdma: Fix DMAR failure in frwr_op_map() after reconnect

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Please cherry-pick this commit for v4.8 stable:

commit 62bdf94a2049822ef8c6d4b0e83cd9c3a1663ab4
Author:     Chuck Lever <chuck.lever@xxxxxxxxxx>
AuthorDate: Mon Nov 7 16:16:24 2016 -0500
Commit:     Anna Schumaker <Anna.Schumaker@xxxxxxxxxx>
CommitDate: Thu Nov 10 11:04:54 2016 -0500

    xprtrdma: Fix DMAR failure in frwr_op_map() after reconnect

This commit is needed to prevent DMAR errors during a spurious
RDMA connection close. Problem reported by Vasco Steinmetz.

To apply 62bdf94a cleanly to v4.8.7, please first apply this
one-line clean-up commit:

commit 5690a22d8612e1788b48b4ea53c59868589cd2db
Author:     Daniel Wagner <daniel.wagner@xxxxxxxxxxxx>
AuthorDate: Fri Sep 23 10:41:57 2016 +0200
Commit:     Anna Schumaker <Anna.Schumaker@xxxxxxxxxx>
CommitDate: Fri Sep 23 09:48:24 2016 -0400

    xprtrdma: use complete() instead complete_all()


Thanks.

--
Chuck Lever

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