diff --git a/drivers/net/e100.c b/drivers/net/e100.c
index bff1354579287779e17aeabf0d419bb9d5186373..b723f4dca11e0da5c14fe8ab95534f37d989e57d 100644
--- a/drivers/net/e100.c
+++ b/drivers/net/e100.c
@@ -2108,6 +2108,8 @@ static void e100_diag_test(struct net_device *netdev,
 	}
 	for(i = 0; i < E100_TEST_LEN; i++)
 		test->flags |= data[i] ? ETH_TEST_FL_FAILED : 0;
+
+	msleep_interruptible(4 * 1000);
 }
 
 static int e100_phys_id(struct net_device *netdev, u32 data)