diff options
| author |   Claudiu Beznea <claudiu.beznea@microchip.com> | 2020-11-13 17:21:05 +0200 |
|---|---|---|
| committer |   Mark Brown <broonie@kernel.org> | 2020-11-13 16:13:11 +0000 |
| commit | bdcd1177578cd5556f7494da86d5038db8203a16 (patch) | |
| tree | ba69542d018dafb2ddcf3347952038339d3c3817 /drivers/regulator/core.c | |
| parent | regulator: mcp16502: remove void documentation of struct mcp16502 (diff) | |
| download | linux-dev-bdcd1177578cd5556f7494da86d5038db8203a16.tar.xz linux-dev-bdcd1177578cd5556f7494da86d5038db8203a16.zip | |
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: Claudiu Beznea <claudiu.beznea@microchip.com>
Link: https://lore.kernel.org/r/1605280870-32432-2-git-send-email-claudiu.beznea@microchip.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers/regulator/core.c')
| -rw-r--r-- | drivers/regulator/core.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c index 2e1ea18221ef..1d0d35f14f37 100644 --- a/drivers/regulator/core.c +++ b/drivers/regulator/core.c @@ -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; |