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regulator: Fix useless O^2 complexity in suspend/resume
regulator_pm_ops with regulator_suspend and regulator_resume functions are
assigned to every regulator device registered in the system, so there is no
need to iterate over all again in them. Replace class_for_each_device()
construction with direct operation on the rdev embedded in the given
regulator device. This saves a lots of useless operations in suspend and
resume paths.
Fixes: f7efad10b5
: regulator: add PM suspend and resume hooks
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
parent
beb5a17fa3
commit
cd7e36ab72
1 changed files with 11 additions and 28 deletions
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@ -4464,19 +4464,6 @@ void regulator_unregister(struct regulator_dev *rdev)
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EXPORT_SYMBOL_GPL(regulator_unregister);
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#ifdef CONFIG_SUSPEND
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static int _regulator_suspend(struct device *dev, void *data)
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{
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struct regulator_dev *rdev = dev_to_rdev(dev);
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suspend_state_t *state = data;
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int ret;
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regulator_lock(rdev);
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ret = suspend_set_state(rdev, *state);
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regulator_unlock(rdev);
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return ret;
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}
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/**
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* regulator_suspend - prepare regulators for system wide suspend
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* @state: system suspend state
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@ -4485,20 +4472,25 @@ static int _regulator_suspend(struct device *dev, void *data)
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*/
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static int regulator_suspend(struct device *dev)
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{
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struct regulator_dev *rdev = dev_to_rdev(dev);
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suspend_state_t state = pm_suspend_target_state;
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int ret;
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return class_for_each_device(®ulator_class, NULL, &state,
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_regulator_suspend);
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regulator_lock(rdev);
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ret = suspend_set_state(rdev, state);
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regulator_unlock(rdev);
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return ret;
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}
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static int _regulator_resume(struct device *dev, void *data)
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static int regulator_resume(struct device *dev)
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{
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int ret = 0;
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suspend_state_t state = pm_suspend_target_state;
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struct regulator_dev *rdev = dev_to_rdev(dev);
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suspend_state_t *state = data;
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struct regulator_state *rstate;
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int ret = 0;
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rstate = regulator_get_suspend_state(rdev, *state);
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rstate = regulator_get_suspend_state(rdev, state);
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if (rstate == NULL)
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return 0;
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@ -4513,15 +4505,6 @@ static int _regulator_resume(struct device *dev, void *data)
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return ret;
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}
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static int regulator_resume(struct device *dev)
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{
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suspend_state_t state = pm_suspend_target_state;
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return class_for_each_device(®ulator_class, NULL, &state,
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_regulator_resume);
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}
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#else /* !CONFIG_SUSPEND */
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#define regulator_suspend NULL
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