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genirq: Split up irq_pm_check_wakeup() 

Let the calling code check for the IRQD_WAKEUP_ARMED flag to prepare for a
live lock mitigation in the edge type handler.

No functional change.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Liangyan <liangyan.peng@bytedance.com>
Link: https://lore.kernel.org/all/20250718185312.012392426@linutronix.de
This commit is contained in:
Thomas Gleixner 2025-07-18 20:54:10 +02:00
parent 4e879dedd5
commit c609045abc
3 changed files with 11 additions and 13 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
kernel/irq/chip.c
View File

@ -488,8 +488,10 @@ static bool irq_can_handle_pm(struct irq_desc *desc)
* and suspended, disable it and notify the pm core about the
* event.
*/
if (irq_pm_check_wakeup(desc))
if (unlikely(irqd_has_set(irqd, IRQD_WAKEUP_ARMED))) {
irq_pm_handle_wakeup(desc);
return false;
}
/* Check whether the interrupt is polled on another CPU */
if (unlikely(desc->istate & IRQS_POLL_INPROGRESS)) {

4
kernel/irq/internals.h
View File

@ -277,11 +277,11 @@ static inline bool irq_is_nmi(struct irq_desc *desc)
}
#ifdef CONFIG_PM_SLEEP
bool irq_pm_check_wakeup(struct irq_desc *desc);
void irq_pm_handle_wakeup(struct irq_desc *desc);
void irq_pm_install_action(struct irq_desc *desc, struct irqaction *action);
void irq_pm_remove_action(struct irq_desc *desc, struct irqaction *action);
#else
static inline bool irq_pm_check_wakeup(struct irq_desc *desc) { return false; }
static inline void irq_pm_handle_wakeup(struct irq_desc *desc) { }
static inline void
irq_pm_install_action(struct irq_desc *desc, struct irqaction *action) { }
static inline void

16
kernel/irq/pm.c
View File

@ -13,17 +13,13 @@
#include "internals.h"
bool irq_pm_check_wakeup(struct irq_desc *desc)
void irq_pm_handle_wakeup(struct irq_desc *desc)
{
if (irqd_is_wakeup_armed(&desc->irq_data)) {
irqd_clear(&desc->irq_data, IRQD_WAKEUP_ARMED);
desc->istate |= IRQS_SUSPENDED | IRQS_PENDING;
desc->depth++;
irq_disable(desc);
pm_system_irq_wakeup(irq_desc_get_irq(desc));
return true;
}
return false;
irqd_clear(&desc->irq_data, IRQD_WAKEUP_ARMED);
desc->istate |= IRQS_SUSPENDED | IRQS_PENDING;
desc->depth++;
irq_disable(desc);
pm_system_irq_wakeup(irq_desc_get_irq(desc));
}
/*