Add lockdep_assert_held_once() to functions explicitly mentioning that
rdev or regulator_list mutex must be held. Using WARN_ONCE shouldn't
pollute the dmesg to much.
The patch (if CONFIG_LOCKDEP enabled) will show warnings in certain
regulators calling regulator_notifier_call_chain() without rdev->mutex
held.
Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
int current_uA = 0, output_uV, input_uV, err;
unsigned int mode;
int current_uA = 0, output_uV, input_uV, err;
unsigned int mode;
+ lockdep_assert_held_once(&rdev->mutex);
+
/*
* first check to see if we can set modes at all, otherwise just
* tell the consumer everything is OK.
/*
* first check to see if we can set modes at all, otherwise just
* tell the consumer everything is OK.
/* locks held by caller */
static int suspend_prepare(struct regulator_dev *rdev, suspend_state_t state)
{
/* locks held by caller */
static int suspend_prepare(struct regulator_dev *rdev, suspend_state_t state)
{
+ lockdep_assert_held_once(&rdev->mutex);
+
if (!rdev->constraints)
return -EINVAL;
if (!rdev->constraints)
return -EINVAL;
if (regulator == NULL || IS_ERR(regulator))
return;
if (regulator == NULL || IS_ERR(regulator))
return;
+ lockdep_assert_held_once(®ulator_list_mutex);
+
rdev = regulator->rdev;
debugfs_remove_recursive(regulator->debugfs);
rdev = regulator->rdev;
debugfs_remove_recursive(regulator->debugfs);
+ lockdep_assert_held_once(&rdev->mutex);
+
/* check voltage and requested load before enabling */
if (rdev->constraints &&
(rdev->constraints->valid_ops_mask & REGULATOR_CHANGE_DRMS))
/* check voltage and requested load before enabling */
if (rdev->constraints &&
(rdev->constraints->valid_ops_mask & REGULATOR_CHANGE_DRMS))
+ lockdep_assert_held_once(&rdev->mutex);
+
if (WARN(rdev->use_count <= 0,
"unbalanced disables for %s\n", rdev_get_name(rdev)))
return -EIO;
if (WARN(rdev->use_count <= 0,
"unbalanced disables for %s\n", rdev_get_name(rdev)))
return -EIO;
+ lockdep_assert_held_once(&rdev->mutex);
+
ret = _notifier_call_chain(rdev, REGULATOR_EVENT_FORCE_DISABLE |
REGULATOR_EVENT_PRE_DISABLE, NULL);
if (ret & NOTIFY_STOP_MASK)
ret = _notifier_call_chain(rdev, REGULATOR_EVENT_FORCE_DISABLE |
REGULATOR_EVENT_PRE_DISABLE, NULL);
if (ret & NOTIFY_STOP_MASK)
int regulator_notifier_call_chain(struct regulator_dev *rdev,
unsigned long event, void *data)
{
int regulator_notifier_call_chain(struct regulator_dev *rdev,
unsigned long event, void *data)
{
+ lockdep_assert_held_once(&rdev->mutex);
+
_notifier_call_chain(rdev, event, data);
return NOTIFY_DONE;
_notifier_call_chain(rdev, event, data);
return NOTIFY_DONE;