linux-kernel - [PATCH] ACPI: PM: s2idle: Avoid rearming SCI for wakeup unnecessarily

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Date:   Mon, 19 Aug 2019 12:35:03 +0200
From:   "Rafael J. Wysocki" <rjw@...ysocki.net>
To:     Linux ACPI <linux-acpi@...r.kernel.org>
Cc:     Linux PM <linux-pm@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>
Subject: [PATCH] ACPI: PM: s2idle: Avoid rearming SCI for wakeup unnecessarily

From: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
Subject: [PATCH] ACPI: PM: s2idle: Avoid rearming SCI for wakeup unnecessarily

It is only necessary to rearm the ACPI SCI for wakeup if
pm_system_cancel_wakeup() has been called, so invoke
rearm_wake_irq() only in that case.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
---

This patch is on top of the pm-s2idle-rework branch in the linux-pm.git tree that
has been present in linux-next for some time.

---
 drivers/acpi/sleep.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

Index: linux-pm/drivers/acpi/sleep.c
===================================================================
--- linux-pm.orig/drivers/acpi/sleep.c
+++ linux-pm/drivers/acpi/sleep.c
@@ -1012,9 +1012,9 @@ static void acpi_s2idle_wake(void)
 		acpi_os_wait_events_complete(); /* synchronize EC GPE processing */
 		acpi_ec_flush_work();
 		acpi_os_wait_events_complete(); /* synchronize Notify handling */
-	}
 
-	rearm_wake_irq(acpi_sci_irq);
+		rearm_wake_irq(acpi_sci_irq);
+	}
 }
 
 static void acpi_s2idle_restore_early(void)