regulator: Check ramp_delay_table for regulator_set_ramp_delay_regmap

Return -EINVAL if ramp_delay_table is NULL.
Also add WARN_ON since the driver code needs fix if this happened.

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Link: https://lore.kernel.org/r/20210519132255.1683863-1-axel.lin@ingics.com
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/drivers/regulator/helpers.c b/drivers/regulator/helpers.c
index 0e16e31c968f124c7b254e4549c994b0c8a49f72..ad2237a95572a7b21d1b11d324da1f5e9e86ad9d 100644 (file)
--- a/drivers/regulator/helpers.c
+++ b/drivers/regulator/helpers.c
@@ -948,7 +948,7 @@ int regulator_set_ramp_delay_regmap(struct regulator_dev *rdev, int ramp_delay)
        int ret;
        unsigned int sel;
 
-       if (!rdev->desc->n_ramp_values)
+       if (WARN_ON(!rdev->desc->n_ramp_values || !rdev->desc->ramp_delay_table))
                return -EINVAL;
 
        ret = find_closest_bigger(ramp_delay, rdev->desc->ramp_delay_table,