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pwm: stm32-lp: Add check for clk_enable()

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[ Upstream commit cce16e7f6216227964cda25f5f23634bce2c500f ]

Add check for the return value of clk_enable() to catch the potential
error.
We used APP-Miner to find it.

Fixes: e70a540b4e02 ("pwm: Add STM32 LPTimer PWM driver")
Signed-off-by: Mingwei Zheng <zmw12306@gmail.com>
Signed-off-by: Jiasheng Jiang <jiashengjiangcool@gmail.com>
Link: https://lore.kernel.org/r/20241206215318.3402860-1-zmw12306@gmail.com
Signed-off-by: Uwe Kleine-König <ukleinek@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Mingwei Zheng 2024-12-06 16:53:18 -05:00 committed by Greg Kroah-Hartman
parent 2d9c5a72a9
commit 78564038ad
1 changed files with 6 additions and 2 deletions
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8
drivers/pwm/pwm-stm32-lp.c
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@ -169,8 +169,12 @@ static int stm32_pwm_lp_get_state(struct pwm_chip *chip,
regmap_read(priv->regmap, STM32_LPTIM_CR, &val); regmap_read(priv->regmap, STM32_LPTIM_CR, &val);
state->enabled = !!FIELD_GET(STM32_LPTIM_ENABLE, val); state->enabled = !!FIELD_GET(STM32_LPTIM_ENABLE, val);
/* Keep PWM counter clock refcount in sync with PWM initial state */ /* Keep PWM counter clock refcount in sync with PWM initial state */
if (state->enabled) if (state->enabled) {
clk_enable(priv->clk); int ret = clk_enable(priv->clk);
if (ret)
return ret;
}
regmap_read(priv->regmap, STM32_LPTIM_CFGR, &val); regmap_read(priv->regmap, STM32_LPTIM_CFGR, &val);
presc = FIELD_GET(STM32_LPTIM_PRESC, val); presc = FIELD_GET(STM32_LPTIM_PRESC, val);