Unverified Commit bdcd1177 authored by Claudiu Beznea's avatar Claudiu Beznea Committed by Mark Brown
Browse files

regulator: core: validate selector against linear_min_sel 



There are regulators who's min selector is not zero. Selectors loops
(looping b/w zero and regulator::desc::n_voltages) might throw errors
because invalid selectors are used (lower than
regulator::desc::linear_min_sel). For this situations validate selectors
against regulator::desc::linear_min_sel.

Signed-off-by: default avatarClaudiu Beznea <claudiu.beznea@microchip.com>
Link: https://lore.kernel.org/r/1605280870-32432-2-git-send-email-claudiu.beznea@microchip.com


Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent 842f4480

drivers/regulator/core.c

+7 −2
Original line number Diff line number Diff line
@@ -2958,7 +2958,8 @@ static int _regulator_list_voltage(struct regulator_dev *rdev, 
		return rdev->desc->fixed_uV;



	if (ops->list_voltage) {

		if (selector >= rdev->desc->n_voltages)

		if (selector >= rdev->desc->n_voltages ||

		    selector < rdev->desc->linear_min_sel)

			return -EINVAL;

		if (lock)

			regulator_lock(rdev);
@@ -3109,7 +3110,8 @@ int regulator_list_hardware_vsel(struct regulator *regulator, 
	struct regulator_dev *rdev = regulator->rdev;

	const struct regulator_ops *ops = rdev->desc->ops;



	if (selector >= rdev->desc->n_voltages)

	if (selector >= rdev->desc->n_voltages ||

	    selector < rdev->desc->linear_min_sel)

		return -EINVAL;

	if (ops->set_voltage_sel != regulator_set_voltage_sel_regmap)

		return -EOPNOTSUPP;
@@ -4032,6 +4034,9 @@ int regulator_set_voltage_time(struct regulator *regulator, 


	for (i = 0; i < rdev->desc->n_voltages; i++) {

		/* We only look for exact voltage matches here */

		if (i < rdev->desc->linear_min_sel)

			continue;



		voltage = regulator_list_voltage(regulator, i);

		if (voltage < 0)

			return -EINVAL;

drivers/regulator/helpers.c

+2 −1
Original line number Diff line number Diff line
@@ -647,7 +647,8 @@ int regulator_list_voltage_table(struct regulator_dev *rdev, 
		return -EINVAL;

	}



	if (selector >= rdev->desc->n_voltages)

	if (selector >= rdev->desc->n_voltages ||

	    selector < rdev->desc->linear_min_sel)

		return -EINVAL;



	return rdev->desc->volt_table[selector];