pwm: fsl-ftm: Make sure to unlock mutex on failure
Upon failure to enable clocks while trying to enable the PWM, make sure
to unlock the mutex that was taken to avoid a deadlock during subsequent
operations.
Reported-by: kbuild test robot <lkp@intel.com>
Reported-by: Julia Lawall <julia.lawall@lip6.fr>
Cc: Patrick Havelange <patrick.havelange@essensium.com>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
diff --git a/drivers/pwm/pwm-fsl-ftm.c b/drivers/pwm/pwm-fsl-ftm.c
index 6a4106c..efc226b 100644
--- a/drivers/pwm/pwm-fsl-ftm.c
+++ b/drivers/pwm/pwm-fsl-ftm.c
@@ -342,12 +342,12 @@ static int fsl_pwm_apply(struct pwm_chip *chip, struct pwm_device *pwm,
if (!oldstate->enabled) {
ret = clk_prepare_enable(fpc->clk[fpc->period.clk_select]);
if (ret)
- return ret;
+ goto end_mutex;
ret = clk_prepare_enable(fpc->clk[FSL_PWM_CLK_CNTEN]);
if (ret) {
clk_disable_unprepare(fpc->clk[fpc->period.clk_select]);
- return ret;
+ goto end_mutex;
}
regmap_update_bits(fpc->regmap, FTM_OUTMASK, BIT(pwm->hwpwm),