diff options
| author | Paolo Pisati | 2012-12-13 10:13:00 +0100 |
|---|---|---|
| committer | Mark Brown | 2012-12-15 15:53:05 +0100 |
| commit | 92d7a55879c01b30349045501108e775655a4b92 (patch) | |
| tree | c4da55ecf4b8253483f238a036e7b1c3911d26b2 /drivers/regulator/core.c | |
| parent | Linux 3.7 (diff) | |
| download | kernel-qcow2-linux-92d7a55879c01b30349045501108e775655a4b92.tar.gz kernel-qcow2-linux-92d7a55879c01b30349045501108e775655a4b92.tar.xz kernel-qcow2-linux-92d7a55879c01b30349045501108e775655a4b92.zip | |
regulator: core: if voltage scaling fails, restore original voltage values
Signed-off-by: Paolo Pisati <paolo.pisati@canonical.com>
Tested-by: Robert Nelson <robertcnelson@gmail.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Diffstat (limited to 'drivers/regulator/core.c')
| -rw-r--r-- | drivers/regulator/core.c | 16 |
1 files changed, 14 insertions, 2 deletions
diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c index e872c8be080e..c347fd03b727 100644 --- a/drivers/regulator/core.c +++ b/drivers/regulator/core.c @@ -2250,6 +2250,7 @@ int regulator_set_voltage(struct regulator *regulator, int min_uV, int max_uV) { struct regulator_dev *rdev = regulator->rdev; int ret = 0; + int old_min_uV, old_max_uV; mutex_lock(&rdev->mutex); @@ -2271,18 +2272,29 @@ int regulator_set_voltage(struct regulator *regulator, int min_uV, int max_uV) ret = regulator_check_voltage(rdev, &min_uV, &max_uV); if (ret < 0) goto out; + + /* restore original values in case of error */ + old_min_uV = regulator->min_uV; + old_max_uV = regulator->max_uV; regulator->min_uV = min_uV; regulator->max_uV = max_uV; ret = regulator_check_consumers(rdev, &min_uV, &max_uV); if (ret < 0) - goto out; + goto out2; ret = _regulator_do_set_voltage(rdev, min_uV, max_uV); - + if (ret < 0) + goto out2; + out: mutex_unlock(&rdev->mutex); return ret; +out2: + regulator->min_uV = old_min_uV; + regulator->max_uV = old_max_uV; + mutex_unlock(&rdev->mutex); + return ret; } EXPORT_SYMBOL_GPL(regulator_set_voltage); |