[PATCH net-next] net: stmmac: remove redundant null check before clk_disable_unprepare()

[Zhang Changzhong]

Because clk_prepare_enable() and clk_disable_unprepare() already checked
NULL clock parameter, so the additional checks are unnecessary, just
remove them.

Reported-by: Hulk Robot <hul...@huawei.com>
Signed-off-by: Zhang Changzhong <zhangchangzh...@huawei.com>
---
 drivers/net/ethernet/stmicro/stmmac/stmmac_main.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c 
b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
index 89b2b34..c553047 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -788,8 +788,7 @@ static int stmmac_init_ptp(struct stmmac_priv *priv)
 
 static void stmmac_release_ptp(struct stmmac_priv *priv)
 {
-       if (priv->plat->clk_ptp_ref)
-               clk_disable_unprepare(priv->plat->clk_ptp_ref);
+       clk_disable_unprepare(priv->plat->clk_ptp_ref);
        stmmac_ptp_unregister(priv);
 }
 
@@ -5108,8 +5107,7 @@ int stmmac_suspend(struct device *dev)
                stmmac_mac_set(priv, priv->ioaddr, false);
                pinctrl_pm_select_sleep_state(priv->device);
                /* Disable clock in case of PWM is off */
-               if (priv->plat->clk_ptp_ref)
-                       clk_disable_unprepare(priv->plat->clk_ptp_ref);
+               clk_disable_unprepare(priv->plat->clk_ptp_ref);
                clk_disable_unprepare(priv->plat->pclk);
                clk_disable_unprepare(priv->plat->stmmac_clk);
        }
-- 
2.9.5