GitHub-Mirror/Star64_linux
2
0
Fork 0
mirror of https://github.com/Fishwaldo/Star64_linux.git synced 2025-03-15 11:44:11 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

PM: sleep: wakeirq: fix wake irq arming

Browse source 
[ Upstream commit 8527beb120 ]

The decision whether to enable a wake irq during suspend can not be done
based on the runtime PM state directly as a driver may use wake irqs
without implementing runtime PM. Such drivers specifically leave the
state set to the default 'suspended' and the wake irq is thus never
enabled at suspend.

Add a new wake irq flag to track whether a dedicated wake irq has been
enabled at runtime suspend and therefore must not be enabled at system
suspend.

Note that pm_runtime_enabled() can not be used as runtime PM is always
disabled during late suspend.

Fixes: 69728051f5 ("PM / wakeirq: Fix unbalanced IRQ enable for wakeirq")
Cc: 4.16+ <stable@vger.kernel.org> # 4.16+
Signed-off-by: Johan Hovold <johan+linaro@kernel.org>
Reviewed-by: Tony Lindgren <tony@atomide.com>
Tested-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Johan Hovold 2023-07-13 16:57:39 +02:00 • committed by Justin Hammond
parent d470eaeebc
commit cfebca20b7
2 changed files with 9 additions and 4 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

1
drivers/base/power/power.h
View file

@ -29,6 +29,7 @@ extern u64 pm_runtime_active_time(struct device *dev);
#define WAKE_IRQ_DEDICATED_MASK (WAKE_IRQ_DEDICATED_ALLOCATED | \
WAKE_IRQ_DEDICATED_MANAGED | \
WAKE_IRQ_DEDICATED_REVERSE)
#define WAKE_IRQ_DEDICATED_ENABLED BIT(3)
struct wake_irq {
struct device *dev;

12
drivers/base/power/wakeirq.c
View file

@ -314,8 +314,10 @@ void dev_pm_enable_wake_irq_check(struct device *dev,
return;
enable:
if (!can_change_status || !(wirq->status & WAKE_IRQ_DEDICATED_REVERSE))
if (!can_change_status || !(wirq->status & WAKE_IRQ_DEDICATED_REVERSE)) {
enable_irq(wirq->irq);
wirq->status |= WAKE_IRQ_DEDICATED_ENABLED;
}
}
/**
@ -336,8 +338,10 @@ void dev_pm_disable_wake_irq_check(struct device *dev, bool cond_disable)
if (cond_disable && (wirq->status & WAKE_IRQ_DEDICATED_REVERSE))
return;
if (wirq->status & WAKE_IRQ_DEDICATED_MANAGED)
if (wirq->status & WAKE_IRQ_DEDICATED_MANAGED) {
wirq->status &= ~WAKE_IRQ_DEDICATED_ENABLED;
disable_irq_nosync(wirq->irq);
}
}
/**
@ -376,7 +380,7 @@ void dev_pm_arm_wake_irq(struct wake_irq *wirq)
if (device_may_wakeup(wirq->dev)) {
if (wirq->status & WAKE_IRQ_DEDICATED_ALLOCATED &&
!pm_runtime_status_suspended(wirq->dev))
!(wirq->status & WAKE_IRQ_DEDICATED_ENABLED))
enable_irq(wirq->irq);
enable_irq_wake(wirq->irq);
@ -399,7 +403,7 @@ void dev_pm_disarm_wake_irq(struct wake_irq *wirq)
disable_irq_wake(wirq->irq);
if (wirq->status & WAKE_IRQ_DEDICATED_ALLOCATED &&
!pm_runtime_status_suspended(wirq->dev))
!(wirq->status & WAKE_IRQ_DEDICATED_ENABLED))
disable_irq_nosync(wirq->irq);
}
}