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| author |   Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2020-02-11 17:53:52 +0100 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2020-02-11 23:26:15 +0100 |
| commit | fdde0ff8590b4c1c41b3227f5ac4265fccccb96b (patch) | |
| tree | bb3ed3ce7000e5377cb8bc602c580bfa9ecfb4f3 /drivers/acpi | |
| parent | ACPICA: Introduce acpi_any_gpe_status_set() (diff) | |
| download | linux-dev-fdde0ff8590b4c1c41b3227f5ac4265fccccb96b.tar.xz linux-dev-fdde0ff8590b4c1c41b3227f5ac4265fccccb96b.zip | |
ACPI: PM: s2idle: Prevent spurious SCIs from waking up the system
If the platform triggers a spurious SCI even though the status bit
is not set for any GPE when the system is suspended to idle, it will
be treated as a genuine wakeup, so avoid that by checking if any GPEs
are active at all before returning 'true' from acpi_s2idle_wake().
Link: https://bugzilla.kernel.org/show_bug.cgi?id=206413
Fixes: 56b991849009 ("PM: sleep: Simplify suspend-to-idle control flow")
Reported-by: Tsuchiya Yuto <kitakar@gmail.com>
Cc: 5.4+ <stable@vger.kernel.org> # 5.4+
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/acpi')
| -rw-r--r-- | drivers/acpi/sleep.c | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/drivers/acpi/sleep.c b/drivers/acpi/sleep.c index 2c695b196cd2..152f7fc0b200 100644 --- a/drivers/acpi/sleep.c +++ b/drivers/acpi/sleep.c @@ -1006,10 +1006,16 @@ static bool acpi_s2idle_wake(void) return true; /* - * If there are no EC events to process, the wakeup is regarded - * as a genuine one. + * If there are no EC events to process and at least one of the + * other enabled GPEs is active, the wakeup is regarded as a + * genuine one. + * + * Note that the checks below must be carried out in this order + * to avoid returning prematurely due to a change of the EC GPE + * status bit from unset to set between the checks with the + * status bits of all the other GPEs unset. */ - if (!acpi_ec_dispatch_gpe()) + if (acpi_any_gpe_status_set() && !acpi_ec_dispatch_gpe()) return true; /* |