r8169: verbose error message.

Signed-off-by: Francois Romieu <romieu@fr.zoreil.com>
Cc: Hayes Wang <hayeswang@realtek.com>
diff --git a/drivers/net/ethernet/realtek/r8169.c b/drivers/net/ethernet/realtek/r8169.c
index 1f27318..be4e00f3 100644
--- a/drivers/net/ethernet/realtek/r8169.c
+++ b/drivers/net/ethernet/realtek/r8169.c
@@ -865,7 +865,8 @@
 		if (c->check(tp) == high)
 			return true;
 	}
-	netif_err(tp, drv, tp->dev, c->msg);
+	netif_err(tp, drv, tp->dev, "%s == %d (loop: %d, delay: %d).\n",
+		  c->msg, !high, n, d);
 	return false;
 }