This patch checks return value for rte_eth_dev_info_get() in show_macs().
Coverity issue: 353629
Fixes: e1d44d0ad6 ("app/testpmd: show MAC addresses added to a port")
Cc: stable@dpdk.org
Signed-off-by: Kalesh AP <kalesh-anakkur.purayil@broadcom.com>
Acked-by: Xiaoyun Li <xiaoyun.li@intel.com>
Acked-by: Andrew Rybchenko <andrew.rybchenko@oktetlabs.ru>