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regulator: da9063: Fix up irq leak 

Current code does not set regulators->irq_ldo_lim and regulators->irq_uvov,
so it actually calls free_irq(0, regulators) twice in remove() but does not
free the irq actually used.

Convert to use devm_request_threaded_irq instead and then we don't need to
take care the clean up irq so remove irq_ldo_lim and irq_uvov from
struct da9063_regulators. Note, regulators->irq_uvov is not used at all in
current code.

There is a slightly change in this patch, it will return error in probe()
if devm_request_threaded_irq fails. If the irq is optional, it should be
fine to allow platform_get_irq_byname fails. But current code does not
allow platform_get_irq_byname fails. So I think the reason to allow
request irq failure is just because the irq leak.

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Axel Lin 2015-05-31 12:27:38 +08:00 committed by Mark Brown
parent b787f68c36
commit d87aef9164
1 changed files with 3 additions and 18 deletions
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21
drivers/regulator/da9063-regulator.c
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@ -117,9 +117,6 @@ struct da9063_regulator {
/* Encapsulates all information for the regulators driver */
struct da9063_regulators {
int irq_ldo_lim;
int irq_uvov;
unsigned n_regulators;
/* Array size to be defined during init. Keep at end. */
struct da9063_regulator regulator[0];
@ -867,35 +864,23 @@ static int da9063_regulator_probe(struct platform_device *pdev)
return irq;
}
ret = request_threaded_irq(irq,
ret = devm_request_threaded_irq(&pdev->dev, irq,
NULL, da9063_ldo_lim_event,
IRQF_TRIGGER_LOW | IRQF_ONESHOT,
"LDO_LIM", regulators);
if (ret) {
dev_err(&pdev->dev,
"Failed to request LDO_LIM IRQ.\n");
regulators->irq_ldo_lim = -ENXIO;
dev_err(&pdev->dev, "Failed to request LDO_LIM IRQ.\n");
return ret;
}
return 0;
}
static int da9063_regulator_remove(struct platform_device *pdev)
{
struct da9063_regulators *regulators = platform_get_drvdata(pdev);
free_irq(regulators->irq_ldo_lim, regulators);
free_irq(regulators->irq_uvov, regulators);
return 0;
}
static struct platform_driver da9063_regulator_driver = {
.driver = {
.name = DA9063_DRVNAME_REGULATORS,
},
.probe = da9063_regulator_probe,
.remove = da9063_regulator_remove,
};
static int __init da9063_regulator_init(void)