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adbbe92956
Make sure port value read from user space by write_ports is valid before passing it to svc_find_xprt(). If it wasn't, the writer would get ENOENT instead of EINVAL. Noticed-by: J. Bruce Fields <bfields@fieldses.org> Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>