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| author | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2014-12-02 01:51:13 +0300 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2014-12-02 01:51:13 +0300 |
| commit | c52fa70c79acbb1d4868fee244a638d6ee6f5aab (patch) | |
| tree | 9e67a8220b3eec6a1fae5c2145475dea7fb4f42b /drivers/acpi/sleep.c | |
| parent | 331dfcf830a424dacbe11f0543ebf6097ae89964 (diff) | |
| download | linux-c52fa70c79acbb1d4868fee244a638d6ee6f5aab.tar.xz | |
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/sleep.c')
| -rw-r--r-- | drivers/acpi/sleep.c | 2 |
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) |