tipc: send explicit not supported error in nl compat
The legacy netlink API treated EPERM (permission denied) as "operation not supported". Reported-by: NTomi Ollila <tomi.ollila@iki.fi> Signed-off-by: NRichard Alpe <richard.alpe@ericsson.com> Reviewed-by: NErik Hugne <erik.hugne@ericsson.com> Reviewed-by: NYing Xue <ying.xue@windriver.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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