regulator: workaround self-referent regulators

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: aea6cb9 ("regulator: resolve supply after creating regulator") Cc: [email protected] Reported-by: Ahmad Fatoum <[email protected]> Signed-off-by: Michał Mirosław <[email protected]> Tested-by: Ahmad Fatoum <[email protected]> # stpmic1 Link: https://lore.kernel.org/r/d703acde2a93100c3c7a81059d716c50ad1b1f52.1605226675.git.mirq-linux@rere.qmqm.pl Signed-off-by: Mark Brown <[email protected]>
vieko · Nov 13, 2020 · f5c042b · f5c042b
1 parent 4b639e2
commit f5c042b
Showing 1 changed file with 4 additions and 1 deletion.
diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
@@ -1844,7 +1844,10 @@ 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);
 	}
 
 	/*