Commit cce16e7f authored by Mingwei Zheng's avatar Mingwei Zheng Committed by Uwe Kleine-König
Browse files

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



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

Fixes: e70a540b ("pwm: Add STM32 LPTimer PWM driver")
Signed-off-by: default avatarMingwei Zheng <zmw12306@gmail.com>
Signed-off-by: default avatarJiasheng Jiang <jiashengjiangcool@gmail.com>
Link: https://lore.kernel.org/r/20241206215318.3402860-1-zmw12306@gmail.com


Signed-off-by: default avatarUwe Kleine-König <ukleinek@kernel.org>
parent 4ccf7e35

drivers/pwm/pwm-stm32-lp.c

+6 −2
Original line number Diff line number Diff line
@@ -167,8 +167,12 @@ 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);