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: 56b9918490
("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>
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@ -1006,10 +1006,16 @@ static bool acpi_s2idle_wake(void)
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return true;
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/*
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* If there are no EC events to process, the wakeup is regarded
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* as a genuine one.
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* If there are no EC events to process and at least one of the
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* other enabled GPEs is active, the wakeup is regarded as a
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* genuine one.
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*
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* Note that the checks below must be carried out in this order
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* to avoid returning prematurely due to a change of the EC GPE
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* status bit from unset to set between the checks with the
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* status bits of all the other GPEs unset.
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*/
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if (!acpi_ec_dispatch_gpe())
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if (acpi_any_gpe_status_set() && !acpi_ec_dispatch_gpe())
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return true;
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/*
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