ethtool: make find_feature_index() return negative errno

diff --git a/src/udev/net/ethtool-util.c b/src/udev/net/ethtool-util.c
index 0dcec03..6a0a423 100644 (file)
--- a/src/udev/net/ethtool-util.c
+++ b/src/udev/net/ethtool-util.c
@@ -358,7 +358,7 @@ static int find_feature_index(struct ethtool_gstrings *strings, const char *feat
                         return i;
         }
 
-        return -1;
+        return -ENODATA;
 }
 
 int ethtool_set_features(int *fd, const char *ifname, int *features) {