xprtrdma: Don't invalidate FRMRs if registration fails
If FRMR registration fails, it's likely to transition the QP to the error state. Or, registration may have failed because the QP is _already_ in ERROR. Thus calling rpcrdma_deregister_external() in rpcrdma_create_chunks() is useless in FRMR mode: the LOCAL_INVs just get flushed. It is safe to leave existing registrations: when FRMR registration is tried again, rpcrdma_register_frmr_external() checks if each FRMR is already/still VALID, and knocks it down first if it is. Signed-off-by: NChuck Lever <chuck.lever@oracle.com> Tested-by: NSteve Wise <swise@opengridcomputing.com> Tested-by: NShirley Ma <shirley.ma@oracle.com> Tested-by: NDevesh Sharma <devesh.sharma@emulex.com> Signed-off-by: NAnna Schumaker <Anna.Schumaker@Netapp.com>
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