regulator: core: Ignore unset max_uA constraints in current limit check

We should only consider max_uA constraints if they are explicitly defined.
In cases where it is not set, we should assume the regulator has no current
limit.

Signed-off-by: Kory Maincent <kory.maincent@bootlin.com>
Link: https://patch.msgid.link/20241121-feature_poe_port_prio-v3-2-83299fa6967c@bootlin.com
Signed-off-by: Mark Brown <broonie@kernel.org>

drivers/regulator/core.c

@@ -497,7 +497,8 @@ static int regulator_check_current_limit(struct regulator_dev *rdev,
 		return -EPERM;
 	}
 
-	if (*max_uA > rdev->constraints->max_uA)
+	if (*max_uA > rdev->constraints->max_uA &&
+	    rdev->constraints->max_uA)
 		*max_uA = rdev->constraints->max_uA;
 	if (*min_uA < rdev->constraints->min_uA)
 		*min_uA = rdev->constraints->min_uA;