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| author | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2018-12-17 12:21:55 +0100 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2018-12-18 10:51:16 +0100 |
| commit | f941d3e41da7f86bdb9dcc1977c2bcc6b89bfe47 (patch) | |
| tree | aecf36606bfff4ad9e6d3c7efdbf26059237ab34 /drivers/acpi/internal.h | |
| parent | 7566ec393f4161572ba6f11ad5171fd5d59b0fbd (diff) | |
| download | lwn-f941d3e41da7f86bdb9dcc1977c2bcc6b89bfe47.tar.gz lwn-f941d3e41da7f86bdb9dcc1977c2bcc6b89bfe47.zip | |
ACPI: EC / PM: Disable non-wakeup GPEs for suspend-to-idle
There are systems in which non-wakeup GPEs fire during the "noirq"
suspend stage of suspending devices and that effectively prevents the
system that tries to suspend to idle from entering any low-power
state at all. If the offending GPE fires regularly and often enough,
the system appears to be suspended, but in fact it is in a tight loop
over "noirq" suspend and "noirq" resume of devices all the time.
To prevent that from happening, disable all non-wakeup GPEs except
for the EC GPE for suspend-to-idle (the EC GPE is special, because
on some systems it has to be enabled for power button wakeup events
to be generated as expected).
Fixes: 147a7d9d25ca (ACPI / PM: Do not reconfigure GPEs for suspend-to-idle)
Link: https://bugzilla.kernel.org/show_bug.cgi?id=201987
Reported-by: Zhang Rui <rui.zhang@intel.com>
Tested-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Tested-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/acpi/internal.h')
| -rw-r--r-- | drivers/acpi/internal.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/acpi/internal.h b/drivers/acpi/internal.h index 530a3f675490..f59d0b9e2683 100644 --- a/drivers/acpi/internal.h +++ b/drivers/acpi/internal.h @@ -188,6 +188,8 @@ int acpi_ec_ecdt_probe(void); int acpi_ec_dsdt_probe(void); void acpi_ec_block_transactions(void); void acpi_ec_unblock_transactions(void); +void acpi_ec_mark_gpe_for_wake(void); +void acpi_ec_set_gpe_wake_mask(u8 action); void acpi_ec_dispatch_gpe(void); int acpi_ec_add_query_handler(struct acpi_ec *ec, u8 query_bit, acpi_handle handle, acpi_ec_query_func func, |