[PATCH] regulator: core: fix _regulator_do_disable return value

[Marco Felsch <m.felsch@pengutronix.de>]

Currently _regulator_do_disable returns 0 if either the ena_pin nor the
ops.disbale() isn't present. This assumes that the call was successful
but it wasn't because disbaling isn't supported at all.

The last case of the if-chain should return -EINVAL, because disabling
isn't supported by the driver as it is done already by
_regulator_do_enable.

Signed-off-by: Marco Felsch <m.felsch@pengutronix.de>
---
 drivers/regulator/core.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index bb1324f93143..69b4e096b632 100644
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -2311,6 +2311,8 @@ static int _regulator_do_disable(struct regulator_dev *rdev)
 		ret = rdev->desc->ops->disable(rdev);
 		if (ret != 0)
 			return ret;
+	} else {
+		return -EINVAL;
 	}
 
 	/* cares about last_off_jiffy only if off_on_delay is required by
-- 
2.18.0