snprintf(filename, sizeof(filename), "/dev/uio%u", uio_num);
dev = makedev(major, minor);
ret = mknod(filename, S_IFCHR | S_IRUSR | S_IWUSR, dev);
- if (f == NULL) {
+ if (ret != 0) {
RTE_LOG(ERR, EAL, "%s(): mknod() failed %s\n",
__func__, strerror(errno));
return -1;