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regulator: ab3100: Fix regulator register error handling 

Ensure to unregister all regulators before return error in probe().

The regulator register order depends on the regulator ID pass to
ab3100_regulator_register() function. Thus we need to scan ab3100_regulator_desc
and find the index of successfully registered regulators, or alternatively just
call ab3100_regulators_remove() to unregister all registered regulators.

Since current code uses a static ab3100_regulators table, explicitly set
reg->rdev = NULL after regulator_unregister() call to ensure calling
ab3100_regulators_remove() in the unwind path always work.

Also move ab3100_regulators_remove() to avoid forward declaration.

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Axel Lin 2013-04-26 21:57:09 +08:00 committed by Mark Brown
parent 8735bc2fe6
commit 018fd856ce
1 changed files with 19 additions and 14 deletions
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33
drivers/regulator/ab3100.c
View File

@ -609,6 +609,19 @@ static const u8 ab3100_reg_initvals[] = {
LDO_D_SETTING,
};
static int ab3100_regulators_remove(struct platform_device *pdev)
{
int i;
for (i = 0; i < AB3100_NUM_REGULATORS; i++) {
struct ab3100_regulator *reg = &ab3100_regulators[i];
regulator_unregister(reg->rdev);
reg->rdev = NULL;
}
return 0;
}
static int
ab3100_regulator_of_probe(struct platform_device *pdev, struct device_node *np)
{
@ -635,8 +648,10 @@ ab3100_regulator_of_probe(struct platform_device *pdev, struct device_node *np)
pdev, NULL, ab3100_regulator_matches[i].init_data,
ab3100_regulator_matches[i].of_node,
(int) ab3100_regulator_matches[i].driver_data);
if (err)
if (err) {
ab3100_regulators_remove(pdev);
return err;
}
}
return 0;
@ -695,25 +710,15 @@ static int ab3100_regulators_probe(struct platform_device *pdev)
err = ab3100_regulator_register(pdev, plfdata, NULL, NULL,
desc->id);
if (err)
if (err) {
ab3100_regulators_remove(pdev);
return err;
}
}
return 0;
}
static int ab3100_regulators_remove(struct platform_device *pdev)
{
int i;
for (i = 0; i < AB3100_NUM_REGULATORS; i++) {
struct ab3100_regulator *reg = &ab3100_regulators[i];
regulator_unregister(reg->rdev);
}
return 0;
}
static struct platform_driver ab3100_regulators_driver = {
.driver = {
.name = "ab3100-regulators",