diff --git a/[refs] b/[refs]
index 49be4146c228..acc89fa4da54 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: a24b163b7c16f9e30e726319115e45ed6e683582
+refs/heads/master: 7401a4670f0e81d50dcc4e0a7bd2dcb4a5d65e6b
diff --git a/trunk/drivers/s390/net/cu3088.c b/trunk/drivers/s390/net/cu3088.c
index b12533104c1f..e1b8c9a9634f 100644
--- a/trunk/drivers/s390/net/cu3088.c
+++ b/trunk/drivers/s390/net/cu3088.c
@@ -77,7 +77,7 @@ group_write(struct device_driver *drv, const char *buf, size_t count)
 		int len;
 
 		if (!(end = strchr(start, delim[i])))
-			return count;
+			return -EINVAL;
 		len = min_t(ptrdiff_t, BUS_ID_SIZE, end - start + 1);
 		strlcpy (bus_ids[i], start, len);
 		argv[i] = bus_ids[i];