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@ti.com>
Signed-off-by: Qingliang Li <qingliang.li@mediatek.com>
Reviewed-by: Johan Hovold <johan+linaro@kernel.org>
Cc: 5.16+ <stable@vger.kernel.org> # 5.16+
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/base/power/wakeirq.c b/drivers/base/power/wakeirq.c
index aea690c64e3946d0cf405331ce966ca78ed94ce9..4f4310724fee54f1f2fa3679b7c58f6aa43ae849 100644 (file)
--- a/drivers/base/power/wakeirq.c
+++ b/drivers/base/power/wakeirq.c
@@ -365,8 +365,10 @@ 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;
+       }
 }
 
 /**