regulator: Fix the s5m8767a problem of the division by null

If ramp_delay is 0, delay value can be divided by zero.
This patch can fix the problem.

Signed-off-by: Sangbeom Kim <sbkim73@samsung.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

diff --git a/drivers/regulator/s5m8767.c b/drivers/regulator/s5m8767.c
index 290d6fc..9caadb4 100644 (file)
--- a/drivers/regulator/s5m8767.c
+++ b/drivers/regulator/s5m8767.c
@@ -451,7 +451,7 @@ static int s5m8767_set_voltage_time_sel(struct regulator_dev *rdev,
 
        desc = reg_voltage_map[reg_id];
 
-       if (old_sel < new_sel)
+       if ((old_sel < new_sel) && s5m8767->ramp_delay)
                return DIV_ROUND_UP(desc->step * (new_sel - old_sel),
                                        s5m8767->ramp_delay * 1000);
        return 0;