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authorRafael J. Wysocki <rafael.j.wysocki@intel.com>2018-12-17 14:21:55 +0300
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2018-12-18 12:51:16 +0300
commitf941d3e41da7f86bdb9dcc1977c2bcc6b89bfe47 (patch)
treeaecf36606bfff4ad9e6d3c7efdbf26059237ab34 /drivers/acpi/internal.h
parent7566ec393f4161572ba6f11ad5171fd5d59b0fbd (diff)
downloadlinux-f941d3e41da7f86bdb9dcc1977c2bcc6b89bfe47.tar.xz
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.h2
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,