migration/rdma: Pass qemu_file errors across link
If we fail for some reason (e.g. a mismatched RAMBlock) and it's set the qemu_file error flag, pass that error back to the peer so it can clean up rather than waiting for some higher level progress. Signed-off-by: NDr. David Alan Gilbert <dgilbert@redhat.com> Reviewed-by: NMichael R. Hines <michael@hinespot.com> Reviewed-by: NJuan Quintela <quintela@redhat.com> Signed-off-by: NJuan Quintela <quintela@redhat.com>
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