regulator: core: Fix resolve supply lookup issue

[ Upstream commit 0debed5b117d11e33cba52870c4dcb64f5911891 ]

From Marek's log, the previous change modify the parent of rdev.
https://lore.kernel.org/all/58b92e75-f373-dae7-7031-8abd465bb874@samsung.com/

In 'regulator_resolve_supply', it uses the parent DT node of rdev as the
DT-lookup starting node. But the parent DT node may not exist. This will
cause the NULL supply issue.

This patch modify the parent of rdev back to the device that provides
from 'regulator_config' in 'regulator_register'.

Fixes: 8f3cbcd6b440 ("regulator: core: Use different devices for resource allocation and DT lookup")
Reported-by: Marek Szyprowski <m.szyprowski@samsung.com>
Tested-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: ChiYuan Huang <cy_huang@richtek.com>
Link: https://lore.kernel.org/r/1670981831-12583-1-git-send-email-u0084500@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index 8b567664f8120fa83de9459e009bcc479cbc8f22..8e83a20a7e2e811ae5eac8ed53d08b4203d08743 100644 (file)
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -5534,7 +5534,7 @@ regulator_register(struct device *dev,
 
        /* register with sysfs */
        rdev->dev.class = &regulator_class;
-       rdev->dev.parent = dev;
+       rdev->dev.parent = config->dev;
        dev_set_name(&rdev->dev, "regulator.%lu",
                    (unsigned long) atomic_inc_return(&regulator_no));
        dev_set_drvdata(&rdev->dev, rdev);