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authorRafael J. Wysocki <rafael.j.wysocki@intel.com>2014-12-01 23:51:13 +0100
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2014-12-01 23:51:13 +0100
commitc52fa70c79acbb1d4868fee244a638d6ee6f5aab (patch)
tree9e67a8220b3eec6a1fae5c2145475dea7fb4f42b /drivers/acpi
parent331dfcf830a424dacbe11f0543ebf6097ae89964 (diff)
ACPI / sleep: Drain outstanding events after disabling multiple GPEs
After multiple GPEs have been disabled at the low level in one go, like when acpi_disable_all_gpes() is called, we should always drain all of the outstanding events from them, or interesting races become possible. For this reason, call acpi_os_wait_events_complete() after acpi_enable_all_wakeup_gpes() and acpi_disable_all_gpes() in acpi_freeze_prepare() and acpi_power_off_prepare(), respectively. Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/acpi')
-rw-r--r--drivers/acpi/sleep.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/acpi/sleep.c b/drivers/acpi/sleep.c
index 05a31b573fc3..8aa9254a387f 100644
--- a/drivers/acpi/sleep.c
+++ b/drivers/acpi/sleep.c
@@ -630,6 +630,7 @@ static int acpi_freeze_begin(void)
static int acpi_freeze_prepare(void)
{
acpi_enable_all_wakeup_gpes();
+ acpi_os_wait_events_complete();
enable_irq_wake(acpi_gbl_FADT.sci_interrupt);
return 0;
}
@@ -825,6 +826,7 @@ static void acpi_power_off_prepare(void)
/* Prepare to power off the system */
acpi_sleep_prepare(ACPI_STATE_S5);
acpi_disable_all_gpes();
+ acpi_os_wait_events_complete();
}
static void acpi_power_off(void)