diff --git a/[refs] b/[refs]
index 29be08e2c4f7..2c3a2b6e49e5 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: a13d3104710184ecc43edc35a25ae8092058463f
+refs/heads/master: 604dfd6efc9b79bce432f2394791708d8e8f6efc
diff --git a/trunk/net/core/pktgen.c b/trunk/net/core/pktgen.c
index b29dacf900f9..e6e1cbe863f5 100644
--- a/trunk/net/core/pktgen.c
+++ b/trunk/net/core/pktgen.c
@@ -1781,10 +1781,13 @@ static ssize_t pktgen_thread_write(struct file *file,
 			return -EFAULT;
 		i += len;
 		mutex_lock(&pktgen_thread_lock);
-		pktgen_add_device(t, f);
+		ret = pktgen_add_device(t, f);
 		mutex_unlock(&pktgen_thread_lock);
-		ret = count;
-		sprintf(pg_result, "OK: add_device=%s", f);
+		if (!ret) {
+			ret = count;
+			sprintf(pg_result, "OK: add_device=%s", f);
+		} else
+			sprintf(pg_result, "ERROR: can not add device %s", f);
 		goto out;
 	}