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FAILED: patch "[PATCH] PM: sleep: wakeirq: fix wake irq arming" failed to apply to 4.19-stable tree

PATCH [email protected] 1 participant 1 message Aug 1, 2023

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Stable branch Driver core Suspend to RAM Hibernation +1 more subsystems
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The patch below does not apply to the 4.19-stable tree.
If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <[email protected]>.

To reproduce the conflict and resubmit, you may use the following commands:

git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-4.19.y
git checkout FETCH_HEAD
git cherry-pick -x 8527beb12087238d4387607597b4020bc393c4b4
# <resolve conflicts, build, test, etc.>
git commit -s
git send-email --to '<[email protected]>' --in-reply-to '2023080147-enclose-senate-c22b@gregkh' --subject-prefix 'PATCH 4.19.y' HEAD^..

Possible dependencies:

8527beb12087 ("PM: sleep: wakeirq: fix wake irq arming")
259714100d98 ("PM / wakeirq: support enabling wake-up irq after runtime_suspend called")

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From 8527beb12087238d4387607597b4020bc393c4b4 Mon Sep 17 00:00:00 2001
From: Johan Hovold <[email protected]>
Date: Thu, 13 Jul 2023 16:57:39 +0200
Subject: [PATCH] PM: sleep: wakeirq: fix wake irq arming

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 69728051f5bf ("PM / wakeirq: Fix unbalanced IRQ enable for wakeirq")
Cc 4.16+ <[email protected]> # 4.16+
Signed-off-by Johan Hovold <[email protected]>
Reviewed-by Tony Lindgren <[email protected]>
Tested-by Tony Lindgren <[email protected]>
Signed-off-by Rafael J. Wysocki <[email protected]>
drivers/base/power/power.h +1 -0
index 0eb7f02b3ad5..922ed457db19 100644
@@ -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;
drivers/base/power/wakeirq.c +8 -4
index d487a6bac630..afd094dec5ca 100644
@@ -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);
 	}
 }