s390/qeth: don't process empty bridge port events
Discard events that don't contain any entries. This shouldn't happen, but subsequent code relies on being able to use entry 0. So better be safe than accessing garbage. Fixes: b4d72c08 ("qeth: bridgeport support - basic control") Signed-off-by: NJulian Wiedmann <jwi@linux.ibm.com> Reviewed-by: NAlexandra Winter <wintera@linux.ibm.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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