netdev - [PATCH net-next] net: stmmac: remove redundant null check before clk_disable

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Message-ID: <1599483444-43331-1-git-send-email-zhangchangzhong@huawei.com>
Date:   Mon, 7 Sep 2020 20:57:24 +0800
From:   Zhang Changzhong <zhangchangzhong@...wei.com>
To:     <peppe.cavallaro@...com>, <alexandre.torgue@...com>,
        <joabreu@...opsys.com>, <davem@...emloft.net>, <kuba@...nel.org>,
        <mcoquelin.stm32@...il.com>
CC:     <netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: [PATCH net-next] net: stmmac: remove redundant null check before clk_disable_unprepare()

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 <hulkci@...wei.com>
Signed-off-by: Zhang Changzhong <zhangchangzhong@...wei.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