From: Jonathan Bakker <xc-racer2@xxxxxxx>
pwm_vibrator_stop disables the regulator, but it can be called from
multiple places, even when the regulator is already disabled. Fix this
by using regulator_is_enabled check when starting and stopping device.
Signed-off-by: Jonathan Bakker <xc-racer2@xxxxxxx>
Signed-off-by: Paweł Chmiel <pawel.mikolaj.chmiel@xxxxxxxxx>
---
drivers/input/misc/pwm-vibra.c | 13 ++++++++-----
1 file changed, 8 insertions(+), 5 deletions(-)
diff --git a/drivers/input/misc/pwm-vibra.c b/drivers/input/misc/pwm-vibra.c
index 55da191ae550..66677ee770ca 100644
--- a/drivers/input/misc/pwm-vibra.c
+++ b/drivers/input/misc/pwm-vibra.c
@@ -42,10 +42,12 @@ static int pwm_vibrator_start(struct pwm_vibrator *vibrator)
struct pwm_state state;
int err;
- err = regulator_enable(vibrator->vcc);
- if (err) {
- dev_err(pdev, "failed to enable regulator: %d", err);
- return err;
+ if (!regulator_is_enabled(vibrator->vcc)) {
+ err = regulator_enable(vibrator->vcc);
+ if (err) {
+ dev_err(pdev, "failed to enable regulator: %d", err);
+ return err;
+ }
}
pwm_get_state(vibrator->pwm, &state);
@@ -76,7 +78,8 @@ static int pwm_vibrator_start(struct pwm_vibrator *vibrator)
static void pwm_vibrator_stop(struct pwm_vibrator *vibrator)
{
- regulator_disable(vibrator->vcc);
+ if (regulator_is_enabled(vibrator->vcc))
+ regulator_disable(vibrator->vcc);
if (vibrator->pwm_dir)
pwm_disable(vibrator->pwm_dir);
--
2.17.1
