Since NULL is a valid clock, we shouldn't use
IS_ERR_OR_NULL.

Implemented as Russell King suggested in:

http://lkml.kernel.org/r/20150207172949.ge8...@n2100.arm.linux.org.uk

Signed-off-by: Niklas Cassel <nikl...@axis.com>
---
 drivers/net/phy/micrel.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/net/phy/micrel.c b/drivers/net/phy/micrel.c
index 1190fd8..d958d13 100644
--- a/drivers/net/phy/micrel.c
+++ b/drivers/net/phy/micrel.c
@@ -522,6 +522,7 @@ static int kszphy_probe(struct phy_device *phydev)
        struct device_node *np = phydev->dev.of_node;
        struct kszphy_priv *priv;
        struct clk *clk;
+       unsigned long rate = 0;
        int ret;
 
        priv = devm_kzalloc(&phydev->dev, sizeof(*priv), GFP_KERNEL);
@@ -548,8 +549,10 @@ static int kszphy_probe(struct phy_device *phydev)
        }
 
        clk = devm_clk_get(&phydev->dev, "rmii-ref");
-       if (!IS_ERR(clk)) {
-               unsigned long rate = clk_get_rate(clk);
+       if (!IS_ERR(clk))
+               rate = clk_get_rate(clk);
+
+       if (rate) {
                bool rmii_ref_clk_sel_25_mhz;
 
                priv->rmii_ref_clk_sel = type->has_rmii_ref_clk_sel;
-- 
2.1.4

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