From: Axel Lin Date: Sun, 31 May 2015 04:27:38 +0000 (+0800) Subject: regulator: da9063: Fix up irq leak X-Git-Tag: firefly_0821_release~176^2~1598^2~2^2 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=d87aef9164a57527f2ac36c226a4e60b20695656;p=firefly-linux-kernel-4.4.55.git 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 Signed-off-by: Mark Brown --- diff --git a/drivers/regulator/da9063-regulator.c b/drivers/regulator/da9063-regulator.c index 31c2c593ae0b..aed1ad3dc964 100644 --- a/drivers/regulator/da9063-regulator.c +++ b/drivers/regulator/da9063-regulator.c @@ -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)