diff --git a/drivers/staging/clocking-wizard/clk-xlnx-clock-wizard.c b/drivers/staging/clocking-wizard/clk-xlnx-clock-wizard.c
index 9a7b36937a59d1b0cd2f57e46a8e0f249c49fc17..5455bf3d5a9191323bca2b9e71c4835a314f2e6f 100644
--- a/drivers/staging/clocking-wizard/clk-xlnx-clock-wizard.c
+++ b/drivers/staging/clocking-wizard/clk-xlnx-clock-wizard.c
@@ -91,8 +91,10 @@ static int clk_wzrd_clk_notifier(struct notifier_block *nb, unsigned long event,
 
 	if (ndata->clk == clk_wzrd->clk_in1)
 		max = clk_wzrd_max_freq[clk_wzrd->speed_grade - 1];
-	if (ndata->clk == clk_wzrd->axi_clk)
+	else if (ndata->clk == clk_wzrd->axi_clk)
 		max = WZRD_ACLK_MAX_FREQ;
+	else
+		return NOTIFY_DONE;	/* should never happen */
 
 	switch (event) {
 	case PRE_RATE_CHANGE: