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regulator: Fixes for v3.19

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One correctness fix here for the s2mps11 driver which would have
 resulted in some of the regulators being completely broken together with
 a fix for locking in regualtor_put() (which is fortunately rarely called
 at all in practical systems).
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Merge tag 'regulator-v3.19-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator

Pull regulator fixes from Mark Brown:
 "One correctness fix here for the s2mps11 driver which would have
  resulted in some of the regulators being completely broken together
  with a fix for locking in regualtor_put() (which is fortunately rarely
  called at all in practical systems)"

* tag 'regulator-v3.19-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator:
  regulator: s2mps11: Fix wrong calculation of register offset
  regulator: core: fix race condition in regulator_put()
This commit is contained in:
Linus Torvalds 2015-01-26 14:52:08 -08:00
commit abe3b2695d
3 changed files with 43 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/regulator/core.c
View File

@ -1488,7 +1488,7 @@ struct regulator *regulator_get_optional(struct device *dev, const char *id)
}
EXPORT_SYMBOL_GPL(regulator_get_optional);
/* Locks held by regulator_put() */
/* regulator_list_mutex lock held by regulator_put() */
static void _regulator_put(struct regulator *regulator)
{
struct regulator_dev *rdev;
@ -1503,12 +1503,14 @@ static void _regulator_put(struct regulator *regulator)
/* remove any sysfs entries */
if (regulator->dev)
sysfs_remove_link(&rdev->dev.kobj, regulator->supply_name);
mutex_lock(&rdev->mutex);
kfree(regulator->supply_name);
list_del(&regulator->list);
kfree(regulator);
rdev->open_count--;
rdev->exclusive = 0;
mutex_unlock(&rdev->mutex);
module_put(rdev->owner);
}

42
drivers/regulator/s2mps11.c
View File

@ -405,6 +405,40 @@ static struct regulator_ops s2mps14_reg_ops;
.enable_mask = S2MPS14_ENABLE_MASK \
}
#define regulator_desc_s2mps13_buck7(num, min, step, min_sel) { \
.name = "BUCK"#num, \
.id = S2MPS13_BUCK##num, \
.ops = &s2mps14_reg_ops, \
.type = REGULATOR_VOLTAGE, \
.owner = THIS_MODULE, \
.min_uV = min, \
.uV_step = step, \
.linear_min_sel = min_sel, \
.n_voltages = S2MPS14_BUCK_N_VOLTAGES, \
.ramp_delay = S2MPS13_BUCK_RAMP_DELAY, \
.vsel_reg = S2MPS13_REG_B1OUT + (num) * 2 - 1, \
.vsel_mask = S2MPS14_BUCK_VSEL_MASK, \
.enable_reg = S2MPS13_REG_B1CTRL + (num - 1) * 2, \
.enable_mask = S2MPS14_ENABLE_MASK \
}
#define regulator_desc_s2mps13_buck8_10(num, min, step, min_sel) { \
.name = "BUCK"#num, \
.id = S2MPS13_BUCK##num, \
.ops = &s2mps14_reg_ops, \
.type = REGULATOR_VOLTAGE, \
.owner = THIS_MODULE, \
.min_uV = min, \
.uV_step = step, \
.linear_min_sel = min_sel, \
.n_voltages = S2MPS14_BUCK_N_VOLTAGES, \
.ramp_delay = S2MPS13_BUCK_RAMP_DELAY, \
.vsel_reg = S2MPS13_REG_B1OUT + (num) * 2 - 1, \
.vsel_mask = S2MPS14_BUCK_VSEL_MASK, \
.enable_reg = S2MPS13_REG_B1CTRL + (num) * 2 - 1, \
.enable_mask = S2MPS14_ENABLE_MASK \
}
static const struct regulator_desc s2mps13_regulators[] = {
regulator_desc_s2mps13_ldo(1, MIN_800_MV, STEP_12_5_MV, 0x00),
regulator_desc_s2mps13_ldo(2, MIN_1400_MV, STEP_50_MV, 0x0C),
@ -452,10 +486,10 @@ static const struct regulator_desc s2mps13_regulators[] = {
regulator_desc_s2mps13_buck(4, MIN_500_MV, STEP_6_25_MV, 0x10),
regulator_desc_s2mps13_buck(5, MIN_500_MV, STEP_6_25_MV, 0x10),
regulator_desc_s2mps13_buck(6, MIN_500_MV, STEP_6_25_MV, 0x10),
regulator_desc_s2mps13_buck(7, MIN_500_MV, STEP_6_25_MV, 0x10),
regulator_desc_s2mps13_buck(8, MIN_1000_MV, STEP_12_5_MV, 0x20),
regulator_desc_s2mps13_buck(9, MIN_1000_MV, STEP_12_5_MV, 0x20),
regulator_desc_s2mps13_buck(10, MIN_500_MV, STEP_6_25_MV, 0x10),
regulator_desc_s2mps13_buck7(7, MIN_500_MV, STEP_6_25_MV, 0x10),
regulator_desc_s2mps13_buck8_10(8, MIN_1000_MV, STEP_12_5_MV, 0x20),
regulator_desc_s2mps13_buck8_10(9, MIN_1000_MV, STEP_12_5_MV, 0x20),
regulator_desc_s2mps13_buck8_10(10, MIN_500_MV, STEP_6_25_MV, 0x10),
};
static int s2mps14_regulator_enable(struct regulator_dev *rdev)

2
include/linux/mfd/samsung/s2mps13.h
View File

@ -59,6 +59,7 @@ enum s2mps13_reg {
S2MPS13_REG_B6CTRL,
S2MPS13_REG_B6OUT,
S2MPS13_REG_B7CTRL,
S2MPS13_REG_B7SW,
S2MPS13_REG_B7OUT,
S2MPS13_REG_B8CTRL,
S2MPS13_REG_B8OUT,
@ -102,6 +103,7 @@ enum s2mps13_reg {
S2MPS13_REG_L26CTRL,
S2MPS13_REG_L27CTRL,
S2MPS13_REG_L28CTRL,
S2MPS13_REG_L29CTRL,
S2MPS13_REG_L30CTRL,
S2MPS13_REG_L31CTRL,
S2MPS13_REG_L32CTRL,