diff options
| author |   Thierry Reding <thierry.reding@gmail.com> | 2019-06-26 11:36:40 +0200 |
|---|---|---|
| committer | Thierry Reding <thierry.reding@gmail.com> | 2019-06-26 11:39:25 +0200 |
| commit | 3d25025ce9c2f364ea4ee76f1461c8714b9c0b6d (patch) | |
| tree | 2341105f644a9303c7c10d32ed2804b612c77129 /drivers/pwm | |
| parent | pwm: fsl-ftm: Use write protection for prescaler & polarity (diff) | |
| download | linux-dev-3d25025ce9c2f364ea4ee76f1461c8714b9c0b6d.tar.xz linux-dev-3d25025ce9c2f364ea4ee76f1461c8714b9c0b6d.zip | |
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>
Diffstat (limited to 'drivers/pwm')
| -rw-r--r-- | drivers/pwm/pwm-fsl-ftm.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/pwm/pwm-fsl-ftm.c b/drivers/pwm/pwm-fsl-ftm.c index 6a4106c65cb4..efc226bda214 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), |