[PATCH 1/3] usb: dwc3: handle return value of clk_get_rate() correctly

[Yang Xiwen via B4 Relay]

From: Yang Xiwen <forbidden...@outlook.com>

clk_get_rate() return -ve on error, not 0. Fix it by replacing judging
NULL with IS_ERR_VALUE().

Fixes: 6bae0eb5b8bd("usb: dwc3: Calculate REFCLKPER based on reference clock")
Signed-off-by: Yang Xiwen <forbidden...@outlook.com>
---
 drivers/usb/dwc3/core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
index 4b4fcd8a22..06ff68105e 100644
--- a/drivers/usb/dwc3/core.c
+++ b/drivers/usb/dwc3/core.c
@@ -137,7 +137,7 @@ static void dwc3_ref_clk_period(struct dwc3 *dwc)
 
        if (dwc->ref_clk) {
                rate = clk_get_rate(dwc->ref_clk);
-               if (!rate)
+               if (IS_ERR_VALUE(rate))
                        return;
                period = NSEC_PER_SEC / rate;
        } else {

-- 
2.43.0