linux-kernel - [PATCH 1/3] i2c: lpc2k: Add check for clk

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Message-Id: <20241104214310.6048-1-jiashengjiangcool@gmail.com>
Date: Mon,  4 Nov 2024 21:43:08 +0000
From: Jiasheng Jiang <jiashengjiangcool@...il.com>
To: rmk@...-67.arm.linux.org.uk,
	max.schwarz@...ine.de,
	dianders@...omium.org,
	david.wu@...k-chips.com,
	heiko@...ech.de,
	vz@...ia.com,
	andi.shyti@...nel.org,
	wsa@...nel.org,
	manabian@...il.com
Cc: linux-arm-kernel@...ts.infradead.org,
	linux-rockchip@...ts.infradead.org,
	linux-i2c@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Jiasheng Jiang <jiashengjiangcool@...il.com>
Subject: [PATCH 1/3] i2c: lpc2k: Add check for clk_enable()

Add check for the return value of clk_enable() in order to catch the
potential exception.

Fixes: 3f9c37a0c9a5 ("i2c: lpc2k: add driver")
Signed-off-by: Jiasheng Jiang <jiashengjiangcool@...il.com>
---
 drivers/i2c/busses/i2c-lpc2k.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/drivers/i2c/busses/i2c-lpc2k.c b/drivers/i2c/busses/i2c-lpc2k.c
index 9fb33cbf7419..ea9831f34cd6 100644
--- a/drivers/i2c/busses/i2c-lpc2k.c
+++ b/drivers/i2c/busses/i2c-lpc2k.c
@@ -442,8 +442,14 @@ static int i2c_lpc2k_suspend(struct device *dev)
 static int i2c_lpc2k_resume(struct device *dev)
 {
 	struct lpc2k_i2c *i2c = dev_get_drvdata(dev);
+	int ret;
+
+	ret = clk_enable(i2c->clk);
+	if (ret) {
+		dev_err(dev, "failed to enable clock: %d\n", ret);
+		return ret;
+	}
 
-	clk_enable(i2c->clk);
 	i2c_lpc2k_reset(i2c);
 
 	return 0;
-- 
2.25.1