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Subject[PATCH] regulator: core: if voltage scaling fails, restore original voltage values
Date
Signed-off-by: Paolo Pisati <paolo.pisati@canonical.com>
---
drivers/regulator/core.c | 16 ++++++++++++++--
1 file changed, 14 insertions(+), 2 deletions(-)

diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index e872c8b..c347fd0 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);

--
1.7.10.4


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