From: Mingwei Zheng <zmw12306@gmail.com>
Date: Sun, 15 Dec 2024 22:47:52 +0000 (-0500)
Subject: pwm: stm32: Add check for clk_enable()
X-Git-Tag: v5.10.235~420
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=7794f44cd888004afa01fc9791dd2294f8414f31;p=thirdparty%2Fkernel%2Fstable.git

pwm: stm32: Add check for clk_enable()

[ Upstream commit e8c59791ebb60790c74b2c3ab520f04a8a57219a ]

Add check for the return value of clk_enable() to catch the potential
error.

Fixes: 19f1016ea960 ("pwm: stm32: Fix enable count for clk in .probe()")
Signed-off-by: Mingwei Zheng <zmw12306@gmail.com>
Signed-off-by: Jiasheng Jiang <jiashengjiangcool@gmail.com>
Link: https://lore.kernel.org/r/20241215224752.220318-1-zmw12306@gmail.com
Signed-off-by: Uwe Kleine-König <ukleinek@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---

diff --git a/drivers/pwm/pwm-stm32.c b/drivers/pwm/pwm-stm32.c
index 7146b3f6755bc..2ca2855255be1 100644
--- a/drivers/pwm/pwm-stm32.c
+++ b/drivers/pwm/pwm-stm32.c
@@ -634,8 +634,11 @@ static int stm32_pwm_probe(struct platform_device *pdev)
 	priv->chip.npwm = stm32_pwm_detect_channels(priv, &num_enabled);
 
 	/* Initialize clock refcount to number of enabled PWM channels. */
-	for (i = 0; i < num_enabled; i++)
-		clk_enable(priv->clk);
+	for (i = 0; i < num_enabled; i++) {
+		ret = clk_enable(priv->clk);
+		if (ret)
+			return ret;
+	}
 
 	ret = pwmchip_add(&priv->chip);
 	if (ret < 0)