diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2011-01-13 20:15:35 -0800 |
---|---|---|
committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-01-13 20:15:35 -0800 |
commit | 52cfd503ad7176d23a5dd7af3981744feb60622f (patch) | |
tree | 0a8aeaaf4acbc86ac682f18632b8070c1c6b7ba1 /drivers/acpi/acpica/evgpeinit.c | |
parent | dc8e7e3ec60bd5ef7868aa88755e9d4c948dc5cc (diff) | |
parent | 4263d9a3ae4d15785897d0543bb59316c84ee605 (diff) |
Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6
* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6: (59 commits)
ACPI / PM: Fix build problems for !CONFIG_ACPI related to NVS rework
ACPI: fix resource check message
ACPI / Battery: Update information on info notification and resume
ACPI: Drop device flag wake_capable
ACPI: Always check if _PRW is present before trying to evaluate it
ACPI / PM: Check status of power resources under mutexes
ACPI / PM: Rename acpi_power_off_device()
ACPI / PM: Drop acpi_power_nocheck
ACPI / PM: Drop acpi_bus_get_power()
Platform / x86: Make fujitsu_laptop use acpi_bus_update_power()
ACPI / Fan: Rework the handling of power resources
ACPI / PM: Register power resource devices as soon as they are needed
ACPI / PM: Register acpi_power_driver early
ACPI / PM: Add function for updating device power state consistently
ACPI / PM: Add function for device power state initialization
ACPI / PM: Introduce __acpi_bus_get_power()
ACPI / PM: Introduce function for refcounting device power resources
ACPI / PM: Add functions for manipulating lists of power resources
ACPI / PM: Prevent acpi_power_get_inferred_state() from making changes
ACPICA: Update version to 20101209
...
Diffstat (limited to 'drivers/acpi/acpica/evgpeinit.c')
-rw-r--r-- | drivers/acpi/acpica/evgpeinit.c | 25 |
1 files changed, 21 insertions, 4 deletions
diff --git a/drivers/acpi/acpica/evgpeinit.c b/drivers/acpi/acpica/evgpeinit.c index 4c8dea513b6..c59dc234059 100644 --- a/drivers/acpi/acpica/evgpeinit.c +++ b/drivers/acpi/acpica/evgpeinit.c @@ -45,11 +45,27 @@ #include "accommon.h" #include "acevents.h" #include "acnamesp.h" -#include "acinterp.h" #define _COMPONENT ACPI_EVENTS ACPI_MODULE_NAME("evgpeinit") +/* + * Note: History of _PRW support in ACPICA + * + * Originally (2000 - 2010), the GPE initialization code performed a walk of + * the entire namespace to execute the _PRW methods and detect all GPEs + * capable of waking the system. + * + * As of 10/2010, the _PRW method execution has been removed since it is + * actually unnecessary. The host OS must in fact execute all _PRW methods + * in order to identify the device/power-resource dependencies. We now put + * the onus on the host OS to identify the wake GPEs as part of this process + * and to inform ACPICA of these GPEs via the acpi_setup_gpe_for_wake interface. This + * not only reduces the complexity of the ACPICA initialization code, but in + * some cases (on systems with very large namespaces) it should reduce the + * kernel boot time as well. + */ + /******************************************************************************* * * FUNCTION: acpi_ev_gpe_initialize @@ -222,7 +238,7 @@ void acpi_ev_update_gpes(acpi_owner_id table_owner_id) acpi_status status = AE_OK; /* - * 2) Find any _Lxx/_Exx GPE methods that have just been loaded. + * Find any _Lxx/_Exx GPE methods that have just been loaded. * * Any GPEs that correspond to new _Lxx/_Exx methods are immediately * enabled. @@ -235,9 +251,9 @@ void acpi_ev_update_gpes(acpi_owner_id table_owner_id) return; } + walk_info.count = 0; walk_info.owner_id = table_owner_id; walk_info.execute_by_owner_id = TRUE; - walk_info.count = 0; /* Walk the interrupt level descriptor list */ @@ -298,7 +314,7 @@ void acpi_ev_update_gpes(acpi_owner_id table_owner_id) * xx - is the GPE number [in HEX] * * If walk_info->execute_by_owner_id is TRUE, we only execute examine GPE methods - * with that owner. + * with that owner. * ******************************************************************************/ @@ -415,6 +431,7 @@ acpi_ev_match_gpe_method(acpi_handle obj_handle, * Add the GPE information from above to the gpe_event_info block for * use during dispatch of this GPE. */ + gpe_event_info->flags &= ~(ACPI_GPE_DISPATCH_MASK); gpe_event_info->flags |= (u8)(type | ACPI_GPE_DISPATCH_METHOD); gpe_event_info->dispatch.method_node = method_node; |