- RTE_LOG(ERR, GUEST_CHANNEL, "Error on channel '%s' communications "
- "test: %s\n", fd_path, strerror(ret));
+ RTE_LOG(ERR, GUEST_CHANNEL,
+ "Error on channel '%s' communications test: %s\n",
+ fd_path, ret > 0 ? strerror(ret) :
+ "channel not connected");