From: Michał Mirosław <[email protected]>
[ Upstream commit cf1ad559a20d1930aa7b47a52f54e1f8718de301 ]
regulator_get_voltage_rdev() is called in regulator probe() when
applying machine constraints. The "fixed" commit exposed the problem
that non-bypassed regulators can forward the request to its parent
(like bypassed ones) supply. Return -EPROBE_DEFER when the supply
is expected but not resolved yet.
Fixes: aea6cb99703e ("regulator: resolve supply after creating regulator")
Cc: [email protected]
Signed-off-by: Michał Mirosław <[email protected]>
Reported-by: Ondřej Jirman <[email protected]>
Reported-by: Corentin Labbe <[email protected]>
Tested-by: Ondřej Jirman <[email protected]>
Link:
https://lore.kernel.org/r/a9041d68b4d35e4a2dd71629c8a6422662acb5ee.1604351936.git.mirq-li...@rere.qmqm.pl
Signed-off-by: Mark Brown <[email protected]>
Signed-off-by: Sasha Levin <[email protected]>
---
drivers/regulator/core.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index c290c89421314..ad5235ca8e4ee 100644
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -3405,6 +3405,8 @@ static int _regulator_get_voltage(struct regulator_dev
*rdev)
ret = rdev->desc->fixed_uV;
} else if (rdev->supply) {
ret = _regulator_get_voltage(rdev->supply->rdev);
+ } else if (rdev->supply_name) {
+ return -EPROBE_DEFER;
} else {
return -EINVAL;
}
--
2.27.0
