net: macb: check clk_set_rate return value to be negative

clk_set_rate() returns the set rate in case of success and a
negative number in case of failure. Consider failure only the
negative numbers.

Fixes: 3ef64444de157 ("dm: net: macb: Implement link speed change callback")
Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>

diff --git a/drivers/net/macb.c b/drivers/net/macb.c
index 097d578..80ed58d 100644 (file)
--- a/drivers/net/macb.c
+++ b/drivers/net/macb.c
@@ -631,7 +631,7 @@ int __weak macb_linkspd_cb(struct udevice *dev, unsigned int speed)
 
        if (tx_clk.dev) {
                ret = clk_set_rate(&tx_clk, rate);
-               if (ret)
+               if (ret < 0)
                        return ret;
        }
 #endif