[PATCH] pinctrl: rzn1: Fix check for used MDIO bus

[Phil Edworthy]

This fixes the check for unused mdio bus setting and the following static
checker warning:
 drivers/pinctrl/pinctrl-rzn1.c:198 rzn1_pinctrl_mdio_select()
 warn: always true condition '(ipctl->mdio_func[mdio] >= 0) => (0-u32max >= 0)'

Reported-by: Dan Carpenter <dan.carpen...@oracle.com>
Signed-off-by: Phil Edworthy <phil.edwor...@renesas.com>
---
 drivers/pinctrl/pinctrl-rzn1.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/pinctrl/pinctrl-rzn1.c b/drivers/pinctrl/pinctrl-rzn1.c
index ce05e3a00be2..f688f3a29dfd 100644
--- a/drivers/pinctrl/pinctrl-rzn1.c
+++ b/drivers/pinctrl/pinctrl-rzn1.c
@@ -195,7 +195,7 @@ static void rzn1_hw_set_lock(struct rzn1_pinctrl *ipctl, u8 
lock, u8 value)
 static void rzn1_pinctrl_mdio_select(struct rzn1_pinctrl *ipctl, int mdio,
                                     u32 func)
 {
-       if (ipctl->mdio_func[mdio] >= 0 && ipctl->mdio_func[mdio] != func)
+       if (ipctl->mdio_func[mdio] != -1 && ipctl->mdio_func[mdio] != func)
                dev_warn(ipctl->dev, "conflicting setting for mdio%d!\n", mdio);
        ipctl->mdio_func[mdio] = func;
 
-- 
2.17.1