PM / wakeirq: Enable dedicated wakeirq for suspend

We currently rely on runtime PM to enable dedicated wakeirq for suspend.
This assumption fails in the following two cases:

1. If the consumer driver does not have runtime PM implemented, the
   dedicated wakeirq never gets enabled for suspend

2. If the consumer driver has runtime PM implemented, but does not idle
   in suspend

Let's fix the issue by always enabling the dedicated wakeirq during
suspend.

Depends-on: bed5703 (PM / wakeirq: Fix dedicated wakeirq for drivers not using autosuspend)
Fixes: 4990d4f (PM / Wakeirq: Add automated device wake IRQ handling)
Reported-by: Keerthy <[email protected]>
Tested-by: Keerthy <[email protected]>
Signed-off-by: Grygorii Strashko <[email protected]>
[ [email protected]: updated based on bed5703, added description ]
Tested-by: Tony Lindgren <[email protected]>
Signed-off-by: Tony Lindgren <[email protected]>
Signed-off-by: Rafael J. Wysocki <[email protected]>

Author: grygoriyS

drivers/base/power/wakeirq.c

@@ -312,8 +312,12 @@ void dev_pm_arm_wake_irq(struct wake_irq *wirq)
 	if (!wirq)
 		return;
 
-	if (device_may_wakeup(wirq->dev))
+	if (device_may_wakeup(wirq->dev)) {
+		if (wirq->status & WAKE_IRQ_DEDICATED_ALLOCATED)
+			enable_irq(wirq->irq);
+
 		enable_irq_wake(wirq->irq);
+	}
 }
 
 /**
@@ -328,6 +332,10 @@ void dev_pm_disarm_wake_irq(struct wake_irq *wirq)
 	if (!wirq)
 		return;
 
-	if (device_may_wakeup(wirq->dev))
+	if (device_may_wakeup(wirq->dev)) {
 		disable_irq_wake(wirq->irq);
+
+		if (wirq->status & WAKE_IRQ_DEDICATED_ALLOCATED)
+			disable_irq_nosync(wirq->irq);
+	}
 }