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

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BugLink: https://bugs.launchpad.net/bugs/2111953

[ 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: e70a540b4e ("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>
Signed-off-by: Manuel Diewald <manuel.diewald@canonical.com>
Signed-off-by: Mehmet Basaran <mehmet.basaran@canonical.com>
This commit is contained in:
Mingwei Zheng
2024-12-06 16:53:18 -05:00
committed by Mehmet Basaran
parent 0fb299f8d1
commit 9c38977565
1 changed files with 6 additions and 2 deletions
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drivers/pwm/pwm-stm32-lp.c
+6 -2
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@@ -168,8 +168,12 @@ static int stm32_pwm_lp_get_state(struct pwm_chip *chip,
regmap_read(priv->regmap, STM32_LPTIM_CR, &val);
state->enabled = !!FIELD_GET(STM32_LPTIM_ENABLE, val);
/* Keep PWM counter clock refcount in sync with PWM initial state */
if (state->enabled)
clk_enable(priv->clk);
if (state->enabled) {
int ret = clk_enable(priv->clk);
if (ret)
return ret;
}
regmap_read(priv->regmap, STM32_LPTIM_CFGR, &val);
presc = FIELD_GET(STM32_LPTIM_PRESC, val);