diff mbox series

[31/38] can: mscan: simplify clock enable/disable

Message ID 20200921134557.2251383-32-mkl@pengutronix.de
State Awaiting Upstream
Delegated to: David Miller
Headers show
Series [01/38] can: grcan: fix spelling mistake "buss" -> "bus" | expand

Commit Message

Marc Kleine-Budde Sept. 21, 2020, 1:45 p.m. UTC 
From: Zhang Changzhong <zhangchangzhong@huawei.com>

All the NULL checks are pointless, clk_*() routines already deal with
NULL just fine.

Signed-off-by: Zhang Changzhong <zhangchangzhong@huawei.com>
Link: https://lore.kernel.org/r/1594972875-27631-1-git-send-email-zhangchangzhong@huawei.com
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
---
 drivers/net/can/mscan/mscan.c | 28 ++++++++++------------------
 1 file changed, 10 insertions(+), 18 deletions(-)
diff mbox series

Patch

diff --git a/drivers/net/can/mscan/mscan.c b/drivers/net/can/mscan/mscan.c
index 0b3532dd50e2..640ba1b356ec 100644
--- a/drivers/net/can/mscan/mscan.c
+++ b/drivers/net/can/mscan/mscan.c
@@ -541,16 +541,12 @@  static int mscan_open(struct net_device *dev)
 	struct mscan_priv *priv = netdev_priv(dev);
 	struct mscan_regs __iomem *regs = priv->reg_base;
 
-	if (priv->clk_ipg) {
-		ret = clk_prepare_enable(priv->clk_ipg);
-		if (ret)
-			goto exit_retcode;
-	}
-	if (priv->clk_can) {
-		ret = clk_prepare_enable(priv->clk_can);
-		if (ret)
-			goto exit_dis_ipg_clock;
-	}
+	ret = clk_prepare_enable(priv->clk_ipg);
+	if (ret)
+		goto exit_retcode;
+	ret = clk_prepare_enable(priv->clk_can);
+	if (ret)
+		goto exit_dis_ipg_clock;
 
 	/* common open */
 	ret = open_candev(dev);
@@ -584,11 +580,9 @@  static int mscan_open(struct net_device *dev)
 	napi_disable(&priv->napi);
 	close_candev(dev);
 exit_dis_can_clock:
-	if (priv->clk_can)
-		clk_disable_unprepare(priv->clk_can);
+	clk_disable_unprepare(priv->clk_can);
 exit_dis_ipg_clock:
-	if (priv->clk_ipg)
-		clk_disable_unprepare(priv->clk_ipg);
+	clk_disable_unprepare(priv->clk_ipg);
 exit_retcode:
 	return ret;
 }
@@ -607,10 +601,8 @@  static int mscan_close(struct net_device *dev)
 	close_candev(dev);
 	free_irq(dev->irq, dev);
 
-	if (priv->clk_can)
-		clk_disable_unprepare(priv->clk_can);
-	if (priv->clk_ipg)
-		clk_disable_unprepare(priv->clk_ipg);
+	clk_disable_unprepare(priv->clk_can);
+	clk_disable_unprepare(priv->clk_ipg);
 
 	return 0;
 }