diff options
| author | Steve Twiss <stwiss.opensource@diasemi.com> | 2019-02-26 18:46:55 +0300 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2019-03-13 18:10:42 +0300 |
| commit | 275513b7695a61b75b2546406ecd0f8e3d9fc8be (patch) | |
| tree | 997cabc84a698923a2047fdd3abebab0903fe58f /drivers/regulator/pv88090-regulator.c | |
| parent | 1867af94cfdf37fc70fe67b3d522e78352800196 (diff) | |
| download | linux-275513b7695a61b75b2546406ecd0f8e3d9fc8be.tar.xz | |
regulator: pv88090: Fix notifier mutex lock warning
The mutex for the regulator_dev must be controlled by the caller of
the regulator_notifier_call_chain(), as described in the comment
for that function.
Failure to mutex lock and unlock surrounding the notifier call results
in a kernel WARN_ON_ONCE() which will dump a backtrace for the
regulator_notifier_call_chain() when that function call is first made.
The mutex can be controlled using the regulator_lock/unlock() API.
Fixes: c90456e36d9c ("regulator: pv88090: new regulator driver")
Suggested-by: Adam Thomson <Adam.Thomson.Opensource@diasemi.com>
Signed-off-by: Steve Twiss <stwiss.opensource@diasemi.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers/regulator/pv88090-regulator.c')
| -rw-r--r-- | drivers/regulator/pv88090-regulator.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/regulator/pv88090-regulator.c b/drivers/regulator/pv88090-regulator.c index 6e97cc6df2ee..90f4f907fb3f 100644 --- a/drivers/regulator/pv88090-regulator.c +++ b/drivers/regulator/pv88090-regulator.c @@ -237,9 +237,11 @@ static irqreturn_t pv88090_irq_handler(int irq, void *data) if (reg_val & PV88090_E_VDD_FLT) { for (i = 0; i < PV88090_MAX_REGULATORS; i++) { if (chip->rdev[i] != NULL) { + regulator_lock(chip->rdev[i]); regulator_notifier_call_chain(chip->rdev[i], REGULATOR_EVENT_UNDER_VOLTAGE, NULL); + regulator_unlock(chip->rdev[i]); } } @@ -254,9 +256,11 @@ static irqreturn_t pv88090_irq_handler(int irq, void *data) if (reg_val & PV88090_E_OVER_TEMP) { for (i = 0; i < PV88090_MAX_REGULATORS; i++) { if (chip->rdev[i] != NULL) { + regulator_lock(chip->rdev[i]); regulator_notifier_call_chain(chip->rdev[i], REGULATOR_EVENT_OVER_TEMP, NULL); + regulator_unlock(chip->rdev[i]); } } |