[PATCH v1 04/11] 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 <dig...@gmail.com>
---
 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