From: Rafael J. Wysocki rafael.j.wysocki@intel.com
[ Upstream commit 607b9df63057a56f6172d560d5366cca6a030c76 ]
Flushing the EC work while suspended to idle when the EC GPE status is not set causes some EC wakeup events (notably power button and lid ones) to be missed after a series of spurious wakeups on the Dell XPS13 9360 in my office.
If that happens, the machine cannot be woken up from suspend-to-idle by the power button or lid status change and it needs to be woken up in some other way (eg. by a key press).
Flushing the EC work only after successful dispatching the EC GPE, which means that its status has been set, avoids the issue, so change the code in question accordingly.
Fixes: 7b301750f7f8 ("ACPI: EC: PM: Avoid premature returns from acpi_s2idle_wake()") Cc: 5.4+ stable@vger.kernel.org # 5.4+ Signed-off-by: Rafael J. Wysocki rafael.j.wysocki@intel.com Tested-by: Chris Chiu chiu@endlessm.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/acpi/ec.c | 6 +++++- drivers/acpi/sleep.c | 15 ++++----------- 2 files changed, 9 insertions(+), 12 deletions(-)
diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c index 5b53a66d403d..57eacdcbf820 100644 --- a/drivers/acpi/ec.c +++ b/drivers/acpi/ec.c @@ -1984,9 +1984,13 @@ bool acpi_ec_dispatch_gpe(void) * to allow the caller to process events properly after that. */ ret = acpi_dispatch_gpe(NULL, first_ec->gpe); - if (ret == ACPI_INTERRUPT_HANDLED) + if (ret == ACPI_INTERRUPT_HANDLED) { pm_pr_dbg("EC GPE dispatched\n");
+ /* Flush the event and query workqueues. */ + acpi_ec_flush_work(); + } + return false; } #endif /* CONFIG_PM_SLEEP */ diff --git a/drivers/acpi/sleep.c b/drivers/acpi/sleep.c index 85514c0f3aa5..d1b74179d217 100644 --- a/drivers/acpi/sleep.c +++ b/drivers/acpi/sleep.c @@ -977,13 +977,6 @@ static int acpi_s2idle_prepare_late(void) return 0; }
-static void acpi_s2idle_sync(void) -{ - /* The EC driver uses special workqueues that need to be flushed. */ - acpi_ec_flush_work(); - acpi_os_wait_events_complete(); /* synchronize Notify handling */ -} - static bool acpi_s2idle_wake(void) { if (!acpi_sci_irq_valid()) @@ -1015,7 +1008,7 @@ static bool acpi_s2idle_wake(void) return true;
/* - * Cancel the wakeup and process all pending events in case + * Cancel the SCI wakeup and process all pending events in case * there are any wakeup ones in there. * * Note that if any non-EC GPEs are active at this point, the @@ -1023,8 +1016,7 @@ static bool acpi_s2idle_wake(void) * should be missed by canceling the wakeup here. */ pm_system_cancel_wakeup(); - - acpi_s2idle_sync(); + acpi_os_wait_events_complete();
/* * The SCI is in the "suspended" state now and it cannot produce @@ -1057,7 +1049,8 @@ static void acpi_s2idle_restore(void) * of GPEs. */ acpi_os_wait_events_complete(); /* synchronize GPE processing */ - acpi_s2idle_sync(); + acpi_ec_flush_work(); /* flush the EC driver's workqueues */ + acpi_os_wait_events_complete(); /* synchronize Notify handling */
s2idle_wakeup = false;