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-rw-r--r--drivers/clk/at91/clk-usb.c7
1 files changed, 5 insertions, 2 deletions
diff --git a/drivers/clk/at91/clk-usb.c b/drivers/clk/at91/clk-usb.c
index 183877712c6c..24b5b020753a 100644
--- a/drivers/clk/at91/clk-usb.c
+++ b/drivers/clk/at91/clk-usb.c
@@ -279,10 +279,13 @@ static int at91rm9200_clk_usb_set_rate(struct clk_hw *hw, unsigned long rate,
int i;
struct at91rm9200_clk_usb *usb = to_at91rm9200_clk_usb(hw);
struct at91_pmc *pmc = usb->pmc;
- unsigned long div = parent_rate / rate;
+ unsigned long div;
- if (parent_rate % rate)
+ if (!rate || parent_rate % rate)
return -EINVAL;
+
+ div = parent_rate / rate;
+
for (i = 0; i < RM9200_USB_DIV_TAB_SIZE; i++) {
if (usb->divisors[i] == div) {
tmp = pmc_read(pmc, AT91_CKGR_PLLBR) &