qeth: return with -EPERM if sniffing is not enabled
Without appropriate configuration at the SE, a HiperSockets device cannot be used for sniffing. Setting the sniffer attribute is rejected with -EPERM. Signed-off-by:Ursula Braun <ursula.braun@de.ibm.com> Signed-off-by:
Frank Blaschka <frank.blaschka@de.ibm.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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