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From 0e933ffc049a0e181b5a6c3af1933976d6959ba9 Mon Sep 17 00:00:00 2001
From: Claudiu Beznea <claudiu.beznea@microchip.com>
Date: Wed, 25 Nov 2020 19:25:47 +0200
Subject: [PATCH 129/247] regulator: core: return zero for selectors lower than
linear_min_sel
Selectors lower than linear_min_sel should not be considered invalid.
Thus return zero in case _regulator_list_voltage(),
regulator_list_hardware_vsel() or regulator_list_voltage_table()
receives such selectors as argument.
Fixes: bdcd1177578c ("regulator: core: validate selector against linear_min_sel")
Reported-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Link: https://lore.kernel.org/r/1606325147-606-1-git-send-email-claudiu.beznea@microchip.com
Signed-off-by: Mark Brown <broonie@kernel.org>
---
drivers/regulator/core.c | 10 ++++++----
drivers/regulator/helpers.c | 5 +++--
2 files changed, 9 insertions(+), 6 deletions(-)
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -3076,9 +3076,10 @@ static int _regulator_list_voltage(struc
return rdev->desc->fixed_uV;
if (ops->list_voltage) {
- if (selector >= rdev->desc->n_voltages ||
- selector < rdev->desc->linear_min_sel)
+ if (selector >= rdev->desc->n_voltages)
return -EINVAL;
+ if (selector < rdev->desc->linear_min_sel)
+ return 0;
if (lock)
regulator_lock(rdev);
ret = ops->list_voltage(rdev, selector);
@@ -3228,9 +3229,10 @@ int regulator_list_hardware_vsel(struct
struct regulator_dev *rdev = regulator->rdev;
const struct regulator_ops *ops = rdev->desc->ops;
- if (selector >= rdev->desc->n_voltages ||
- selector < rdev->desc->linear_min_sel)
+ if (selector >= rdev->desc->n_voltages)
return -EINVAL;
+ if (selector < rdev->desc->linear_min_sel)
+ return 0;
if (ops->set_voltage_sel != regulator_set_voltage_sel_regmap)
return -EOPNOTSUPP;
--- a/drivers/regulator/helpers.c
+++ b/drivers/regulator/helpers.c
@@ -647,9 +647,10 @@ int regulator_list_voltage_table(struct
return -EINVAL;
}
- if (selector >= rdev->desc->n_voltages ||
- selector < rdev->desc->linear_min_sel)
+ if (selector >= rdev->desc->n_voltages)
return -EINVAL;
+ if (selector < rdev->desc->linear_min_sel)
+ return 0;
return rdev->desc->volt_table[selector];
}
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