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Two fixes in the core interrupt code which ensure that all error exits

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unlock the descriptor lock.
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Merge tag 'irq-urgent-2020-08-14' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull irq fixes from Thomas Gleixner:
 "Two fixes in the core interrupt code which ensure that all error exits
  unlock the descriptor lock"

* tag 'irq-urgent-2020-08-14' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  genirq: Unlock irq descriptor after errors
  genirq/PM: Always unlock IRQ descriptor in rearm_wake_irq()
This commit is contained in:
Linus Torvalds 2020-08-14 14:14:28 -07:00
commit 1d229a65b4
2 changed files with 11 additions and 4 deletions
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7
kernel/irq/manage.c
View file

@ -2731,8 +2731,10 @@ int irq_set_irqchip_state(unsigned int irq, enum irqchip_irq_state which,
do {
chip = irq_data_get_irq_chip(data);
if (WARN_ON_ONCE(!chip))
return -ENODEV;
if (WARN_ON_ONCE(!chip)) {
err = -ENODEV;
goto out_unlock;
}
if (chip->irq_set_irqchip_state)
break;
#ifdef CONFIG_IRQ_DOMAIN_HIERARCHY
@ -2745,6 +2747,7 @@ int irq_set_irqchip_state(unsigned int irq, enum irqchip_irq_state which,
if (data)
err = chip->irq_set_irqchip_state(data, which, val);
out_unlock:
irq_put_desc_busunlock(desc, flags);
return err;
}

8
kernel/irq/pm.c
View file

@ -185,14 +185,18 @@ void rearm_wake_irq(unsigned int irq)
unsigned long flags;
struct irq_desc *desc = irq_get_desc_buslock(irq, &flags, IRQ_GET_DESC_CHECK_GLOBAL);
if (!desc || !(desc->istate & IRQS_SUSPENDED) ||
!irqd_is_wakeup_set(&desc->irq_data))
if (!desc)
return;
if (!(desc->istate & IRQS_SUSPENDED) ||
!irqd_is_wakeup_set(&desc->irq_data))
goto unlock;
desc->istate &= ~IRQS_SUSPENDED;
irqd_set(&desc->irq_data, IRQD_WAKEUP_ARMED);
__enable_irq(desc);
unlock:
irq_put_desc_busunlock(desc, flags);
}