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| author | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2010-12-16 13:59:10 +0000 |
|---|---|---|
| committer | Liam Girdwood <lrg@slimlogic.co.uk> | 2011-01-12 14:33:05 +0000 |
| commit | ded06a5270ddd6c3c3e25d9ddcaaaa4cb8385c2f (patch) | |
| tree | a845d31f0bdc663fbbd3fde7dcd9ed638b963c66 /drivers/regulator/core.c | |
| parent | e8eef82b2c652d031bee9dff9762325672f5a1e0 (diff) | |
| download | lwn-ded06a5270ddd6c3c3e25d9ddcaaaa4cb8385c2f.tar.gz lwn-ded06a5270ddd6c3c3e25d9ddcaaaa4cb8385c2f.zip | |
regulator: Only notify voltage changes when they succeed
Currently we notify a voltage change whenever we exit set_voltage(),
even if the change failed for some reason (eg, a constraints issue).
This shouldn't cause any substantial ill effects but is wasteful as
listeners get notified on noops. Fix this by moving the notification
into _do_set_voltage() and only notifying if we don't return an error.
Reported-by: Saravana Kannan <skannan@codeaurora.org>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
Diffstat (limited to 'drivers/regulator/core.c')
| -rw-r--r-- | drivers/regulator/core.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c index a0579f069002..3d72cc8e2f3e 100644 --- a/drivers/regulator/core.c +++ b/drivers/regulator/core.c @@ -1667,6 +1667,10 @@ static int _regulator_do_set_voltage(struct regulator_dev *rdev, ret = -EINVAL; } + if (ret == 0) + _notifier_call_chain(rdev, REGULATOR_EVENT_VOLTAGE_CHANGE, + NULL); + trace_regulator_set_voltage_complete(rdev_get_name(rdev), selector); return ret; @@ -1718,7 +1722,6 @@ int regulator_set_voltage(struct regulator *regulator, int min_uV, int max_uV) ret = _regulator_do_set_voltage(rdev, min_uV, max_uV); out: - _notifier_call_chain(rdev, REGULATOR_EVENT_VOLTAGE_CHANGE, NULL); mutex_unlock(&rdev->mutex); return ret; } |