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PM: Reintroduce dropped call to check_wakeup_irqs 

Patch 2e711c04db
(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>
hifive-unleashed-5.1
Colin Cross 2011-07-11 10:51:49 +02:00 committed by Rafael J. Wysocki
parent e3bbfa78ba
commit 887596224c
1 changed files with 8 additions and 0 deletions
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8
drivers/base/syscore.c
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@ -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");