[PATCH] regulator: core: Don't allow to get regulator until all couples resolved

[Dmitry Osipenko]

Don't allow to get regulator until all of its couples resolved because
consumer will get EPERM and coupling shall be transparent for the drivers.

Signed-off-by: Dmitry Osipenko <digetx@xxxxxxxxx>
Signed-off-by: Mark Brown <broonie@xxxxxxxxxx>
---
 drivers/regulator/core.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index 925df9e6f1e3..089e8ad8ef57 100644
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -1747,6 +1747,16 @@ struct regulator *_regulator_get(struct device *dev, const char *id,
 		return regulator;
 	}
 
+	mutex_lock(&regulator_list_mutex);
+	ret = (rdev->coupling_desc.n_resolved != rdev->coupling_desc.n_coupled);
+	mutex_unlock(&regulator_list_mutex);
+
+	if (ret != 0) {
+		regulator = ERR_PTR(-EPROBE_DEFER);
+		put_device(&rdev->dev);
+		return regulator;
+	}
+
 	ret = regulator_resolve_supply(rdev);
 	if (ret < 0) {
 		regulator = ERR_PTR(ret);
-- 
2.19.0.rc2