diff --git a/drivers/s390/cio/device.c b/drivers/s390/cio/device.c
index 3494bff..ea4652b 100644
--- a/drivers/s390/cio/device.c
+++ b/drivers/s390/cio/device.c
@@ -79,7 +79,7 @@ ccw_uevent (struct device *dev, char **e
 {
 	struct ccw_device *cdev = to_ccwdev(dev);
 	int i = 0;
-	int length = 0;
+	int length = 0, tmp_length = 0;
 
 	if (!cdev)
 		return -ENODEV;
@@ -120,8 +120,8 @@ ccw_uevent (struct device *dev, char **e
 	buffer += length;
 
 	envp[i++] = buffer;
-	length += scnprintf(buffer, buffer_size - length, "MODALIAS=");
-	length += modalias_print(cdev, buffer + length, buffer_size - length);
+	length += tmp_length = scnprintf(buffer, buffer_size - length, "MODALIAS=");
+	length += modalias_print(cdev, buffer + tmp_length, buffer_size - length);
 	if ((buffer_size - length <= 0) || (i >= num_envp))
 		return -ENOMEM;