linux-kernel - [PATCH] i2c: wmt: Fix an error handling path in wmt_i2c

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Date: Fri,  5 Jan 2024 15:39:35 +0100
From: Christophe JAILLET <christophe.jaillet@...adoo.fr>
To: andi.shyti@...nel.org,
	wsa@...nel.org
Cc: linux-arm-kernel@...ts.infradead.org,
	linux-i2c@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	kernel-janitors@...r.kernel.org,
	Christophe JAILLET <christophe.jaillet@...adoo.fr>
Subject: [PATCH] i2c: wmt: Fix an error handling path in wmt_i2c_probe()

wmt_i2c_reset_hardware() calls clk_prepare_enable(). So, should an error
occurs after it, it should be undone by a corresponding
clk_disable_unprepare() call, as already done in the remove function.

Fixes: 560746eb79d3 ("i2c: vt8500: Add support for I2C bus on Wondermedia SoCs")
Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr>
---
 drivers/i2c/busses/i2c-wmt.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/i2c/busses/i2c-wmt.c b/drivers/i2c/busses/i2c-wmt.c
index ec2a8da134e5..198afee5233c 100644
--- a/drivers/i2c/busses/i2c-wmt.c
+++ b/drivers/i2c/busses/i2c-wmt.c
@@ -378,11 +378,15 @@ static int wmt_i2c_probe(struct platform_device *pdev)
 
 	err = i2c_add_adapter(adap);
 	if (err)
-		return err;
+		goto err_disable_clk;
 
 	platform_set_drvdata(pdev, i2c_dev);
 
 	return 0;
+
+err_disable_clk:
+	clk_disable_unprepare(i2c_dev->clk);
+	return err;
 }
 
 static void wmt_i2c_remove(struct platform_device *pdev)
-- 
2.34.1