[PATCH net-next] net: stmmac: Remove useless test before clk_disable_unprepare

[YueHaibing]

clk_disable_unprepare() already checks that the clock pointer is valid.
No need to test it before calling it.

Signed-off-by: YueHaibing <yuehaibing@xxxxxxxxxx>
---
 drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c | 24 +++++++-----------------
 1 file changed, 7 insertions(+), 17 deletions(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c
index 13133b3..f08625a 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c
@@ -1104,30 +1104,20 @@ static int gmac_clk_enable(struct rk_priv_data *bsp_priv, bool enable)
 	} else {
 		if (bsp_priv->clk_enabled) {
 			if (phy_iface == PHY_INTERFACE_MODE_RMII) {
-				if (!IS_ERR(bsp_priv->mac_clk_rx))
-					clk_disable_unprepare(
-						bsp_priv->mac_clk_rx);
+				clk_disable_unprepare(bsp_priv->mac_clk_rx);
 
-				if (!IS_ERR(bsp_priv->clk_mac_ref))
-					clk_disable_unprepare(
-						bsp_priv->clk_mac_ref);
+				clk_disable_unprepare(bsp_priv->clk_mac_ref);
 
-				if (!IS_ERR(bsp_priv->clk_mac_refout))
-					clk_disable_unprepare(
-						bsp_priv->clk_mac_refout);
+				clk_disable_unprepare(bsp_priv->clk_mac_refout);
 			}
 
-			if (!IS_ERR(bsp_priv->clk_phy))
-				clk_disable_unprepare(bsp_priv->clk_phy);
+			clk_disable_unprepare(bsp_priv->clk_phy);
 
-			if (!IS_ERR(bsp_priv->aclk_mac))
-				clk_disable_unprepare(bsp_priv->aclk_mac);
+			clk_disable_unprepare(bsp_priv->aclk_mac);
 
-			if (!IS_ERR(bsp_priv->pclk_mac))
-				clk_disable_unprepare(bsp_priv->pclk_mac);
+			clk_disable_unprepare(bsp_priv->pclk_mac);
 
-			if (!IS_ERR(bsp_priv->mac_clk_tx))
-				clk_disable_unprepare(bsp_priv->mac_clk_tx);
+			clk_disable_unprepare(bsp_priv->mac_clk_tx);
 			/**
 			 * if (!IS_ERR(bsp_priv->clk_mac))
 			 *	clk_disable_unprepare(bsp_priv->clk_mac);
-- 
2.7.0