Patch "PM: sleep: wakeirq: fix wake irq warning in system suspend" has been added to the 5.15-stable tree

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This is a note to let you know that I've just added the patch titled

    PM: sleep: wakeirq: fix wake irq warning in system suspend

to the 5.15-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     pm-sleep-wakeirq-fix-wake-irq-warning-in-system-susp.patch
and it can be found in the queue-5.15 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit 9efc1c12649767d5afd33fd0611b8aadf70e6a4c
Author: Qingliang Li <qingliang.li@xxxxxxxxxxxx>
Date:   Fri Mar 1 17:26:57 2024 +0800

    PM: sleep: wakeirq: fix wake irq warning in system suspend
    
    [ Upstream commit e7a7681c859643f3f2476b2a28a494877fd89442 ]
    
    When driver uses pm_runtime_force_suspend() as the system suspend callback
    function and registers the wake irq with reverse enable ordering, the wake
    irq will be re-enabled when entering system suspend, triggering an
    'Unbalanced enable for IRQ xxx' warning. In this scenario, the call
    sequence during system suspend is as follows:
      suspend_devices_and_enter()
        -> dpm_suspend_start()
          -> dpm_run_callback()
            -> pm_runtime_force_suspend()
              -> dev_pm_enable_wake_irq_check()
              -> dev_pm_enable_wake_irq_complete()
    
        -> suspend_enter()
          -> dpm_suspend_noirq()
            -> device_wakeup_arm_wake_irqs()
              -> dev_pm_arm_wake_irq()
    
    To fix this issue, complete the setting of WAKE_IRQ_DEDICATED_ENABLED flag
    in dev_pm_enable_wake_irq_complete() to avoid redundant irq enablement.
    
    Fixes: 8527beb12087 ("PM: sleep: wakeirq: fix wake irq arming")
    Reviewed-by: Dhruva Gole <d-gole@xxxxxx>
    Signed-off-by: Qingliang Li <qingliang.li@xxxxxxxxxxxx>
    Reviewed-by: Johan Hovold <johan+linaro@xxxxxxxxxx>
    Cc: 5.16+ <stable@xxxxxxxxxxxxxxx> # 5.16+
    Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/drivers/base/power/wakeirq.c b/drivers/base/power/wakeirq.c
index 6f2cdd8643afa..ab6eced7f5762 100644
--- a/drivers/base/power/wakeirq.c
+++ b/drivers/base/power/wakeirq.c
@@ -362,8 +362,10 @@ void dev_pm_enable_wake_irq_complete(struct device *dev)
 		return;
 
 	if (wirq->status & WAKE_IRQ_DEDICATED_MANAGED &&
-	    wirq->status & WAKE_IRQ_DEDICATED_REVERSE)
+	    wirq->status & WAKE_IRQ_DEDICATED_REVERSE) {
 		enable_irq(wirq->irq);
+		wirq->status |= WAKE_IRQ_DEDICATED_ENABLED;
+	}
 }
 
 /**




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