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regulator: workaround self-referent regulators 

commit f5c042b23f7429e5c2ac987b01a31c69059a978b upstream.

Workaround regulators whose supply name happens to be the same as its
own name. This fixes boards that used to work before the early supply
resolving was removed. The error message is left in place so that
offending drivers can be detected.

Fixes: aea6cb99703e ("regulator: resolve supply after creating regulator")
Cc: stable@vger.kernel.org
Reported-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Signed-off-by: Michał Mirosław <mirq-linux@rere.qmqm.pl>
Tested-by: Ahmad Fatoum <a.fatoum@pengutronix.de> # stpmic1
Link: https://lore.kernel.org/r/d703acde2a93100c3c7a81059d716c50ad1b1f52.1605226675.git.mirq-linux@rere.qmqm.pl
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Michał Mirosław 2020-11-13 01:20:28 +01:00 committed by Greg Kroah-Hartman
parent 0d233d5766
commit e7ea18de9b
1 changed files with 4 additions and 1 deletions
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5
drivers/regulator/core.c
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@ -1803,7 +1803,10 @@ static int regulator_resolve_supply(struct regulator_dev *rdev)
if (r == rdev) {
dev_err(dev, "Supply for %s (%s) resolved to itself\n",
rdev->desc->name, rdev->supply_name);
return -EINVAL;
if (!have_full_constraints())
return -EINVAL;
r = dummy_regulator_rdev;
get_device(&r->dev);
}
/*