In 'ipn3ke_hw_tm_node_wr()', elements of 'n->parent_node' are accessed
but 'n->parent_node' can be NULL.
After applying this patch, this null pointer dereference is avoided.
Coverity issue: 337921
Fixes: c820468ac99c ("net/ipn3ke: support TM")
Cc: stable@dpdk.org
Signed-off-by: Andy Pei <andy.pei@intel.com>
Acked-by: Rosen Xu <rosen.xu@intel.com>
ad57c785c8