regulator: core: return err value for regulator_get if there is no DT binding

commit 6d191a5fc7a969d972f1681e1c23781aecb06a61
(regulator: core: Don't defer probe if there's no DT binding for a supply)

Attempted to differentiate between regulator_get() with an actual
DT binding for the supply and when there is none to avoid unnecessary
deferal.
However, ret value supplied by regulator_dev_lookup() is being
ignored by regulator_get(). So, exit with the appropriate return value.

Signed-off-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

drivers/regulator/core.c

@@ -1229,7 +1229,7 @@ static struct regulator *_regulator_get(struct device *dev, const char *id,
 	struct regulator_dev *rdev;
 	struct regulator *regulator = ERR_PTR(-EPROBE_DEFER);
 	const char *devname = NULL;
-	int ret;
+	int ret = 0;
 
 	if (id == NULL) {
 		pr_err("get() with no identifier\n");
@@ -1245,6 +1245,15 @@ static struct regulator *_regulator_get(struct device *dev, const char *id,
 	if (rdev)
 		goto found;
 
+	/*
+	 * If we have return value from dev_lookup fail, we do not expect to
+	 * succeed, so, quit with appropriate error value
+	 */
+	if (ret) {
+		regulator = ERR_PTR(ret);
+		goto out;
+	}
+
 	if (board_wants_dummy_regulator) {
 		rdev = dummy_regulator_rdev;
 		goto found;