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regulator: ab8500-ext: Don't update info->update_val if set_mode() fails 

This ensures info->update_val status is still correct if set_mode() call fails.
Otherwise, get_mode() may return wrong status if a set_mode() call fails.

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Acked-by: Bengt Jonsson <bengt.g.jonsson@stericsson.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Axel Lin 2013-04-16 23:29:12 +08:00 committed by Mark Brown
parent 0b665062a1
commit 66511fa4a7
1 changed files with 18 additions and 8 deletions
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26
drivers/regulator/ab8500-ext.c
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@ -181,6 +181,7 @@ static int ab8500_ext_regulator_set_mode(struct regulator_dev *rdev,
{
int ret = 0;
struct ab8500_ext_regulator_info *info = rdev_get_drvdata(rdev);
u8 regval;
if (info == NULL) {
dev_err(rdev_get_dev(rdev), "regulator info null pointer\n");
@ -189,23 +190,30 @@ static int ab8500_ext_regulator_set_mode(struct regulator_dev *rdev,
switch (mode) {
case REGULATOR_MODE_NORMAL:
info->update_val = info->update_val_hp;
regval = info->update_val_hp;
break;
case REGULATOR_MODE_IDLE:
info->update_val = info->update_val_lp;
regval = info->update_val_lp;
break;
default:
return -EINVAL;
}
if (ab8500_ext_regulator_is_enabled(rdev)) {
u8 regval;
ret = enable(info, &regval);
if (ret < 0)
/* If regulator is enabled and info->cfg->hwreq is set, the regulator
must be on in high power, so we don't need to write the register with
the same value.
*/
if (ab8500_ext_regulator_is_enabled(rdev) &&
!(info->cfg && info->cfg->hwreq)) {
ret = abx500_mask_and_set_register_interruptible(info->dev,
info->update_bank, info->update_reg,
info->update_mask, regval);
if (ret < 0) {
dev_err(rdev_get_dev(rdev),
"Could not set regulator mode.\n");
return ret;
}
dev_dbg(rdev_get_dev(rdev),
"%s-set_mode (bank, reg, mask, value): "
@ -214,7 +222,9 @@ static int ab8500_ext_regulator_set_mode(struct regulator_dev *rdev,
info->update_mask, regval);
}
return ret;
info->update_val = regval;
return 0;
}
static unsigned int ab8500_ext_regulator_get_mode(struct regulator_dev *rdev)