Commit 88759622 authored Jul 11, 2011 by Colin Cross Committed by Rafael J. Wysocki Jul 11, 2011

PM: Reintroduce dropped call to check_wakeup_irqs



Patch 2e711c04
(PM: Remove sysdev suspend, resume and shutdown operations)
deleted sysdev_suspend(), which was being relied on to call
check_wakeup_irqs() in suspend.  If check_wakeup_irqs() is not
called, wake interrupts that are pending when suspend is
entered may be lost.  It also breaks IRQCHIP_MASK_ON_SUSPEND,
which is handled in check_wakeup_irqs().

This patch adds a call to check_wakeup_irqs() in syscore_suspend(),
similar to what was deleted in sysdev_suspend().

Signed-off-by: Colin Cross <ccross@android.com>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>

parent e3bbfa78

drivers/base/syscore.c

+8 −0

Original line number	Diff line number	Diff line
		@@ -9,6 +9,7 @@
		#include <linux/syscore_ops.h>
		#include <linux/mutex.h>
		#include <linux/module.h>
		#include <linux/interrupt.h>

		static LIST_HEAD(syscore_ops_list);
		static DEFINE_MUTEX(syscore_ops_lock);
		@@ -48,6 +49,13 @@ int syscore_suspend(void)
		struct syscore_ops *ops;
		int ret = 0;

		pr_debug("Checking wakeup interrupts\n");

		/* Return error code if there are any wakeup interrupts pending. */
		ret = check_wakeup_irqs();
		if (ret)
		return ret;

		WARN_ONCE(!irqs_disabled(),
		"Interrupts enabled before system core suspend.\n");