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When return values of function calls are not checked, Coverity will report errors like: if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_PATH) == 1) >>> CID 127477: (CHECKED_RETURN) >>> Calling "rte_kvargs_process" without checking return value (as is done elsewhere 25 out of 30 times). rte_kvargs_process(kvlist, VIRTIO_USER_ARG_PATH, &get_string_arg, &path); Coverity issue: 127477, 127478 Fixes: ce2eabdd43ec ("net/virtio-user: add virtual device") Fixes: 6a84c37e3975 ("net/virtio-user: add vhost-user adapter layer") Signed-off-by: Jianfeng Tan <jianfeng.tan@intel.com> Acked-by: Yuanhan Liu <yuanhan.liu@linux.intel.com>