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

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@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index 925df9e6f1e37383de8e98040da73baffa87aa23..089e8ad8ef57ec4b13e811148f438fe373bac48b 100644 (file)
--- 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);