regulator: core: Ensure simple linear voltage mappings falls within the specified range

Integer division may truncate the result.
Use DIV_ROUND_UP to ensure simple linear voltage mappings falls within the
specified range.

Signed-off-by: Axel Lin <axel.lin@gmail.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index 5751f5ed47c0..8918271f9e85 100644
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -2047,7 +2047,7 @@ int regulator_map_voltage_linear(struct regulator_dev *rdev,
                 return -EINVAL;
         }
 
-        ret = (min_uV - rdev->desc->min_uV) / rdev->desc->uV_step;
+        ret = DIV_ROUND_UP(min_uV - rdev->desc->min_uV, rdev->desc->uV_step);
         if (ret < 0)
                 return ret;