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ACPICA: Never run _REG on system_memory and system_IO

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These address spaces are defined by the ACPI spec to be
"always available", and thus _REG should never be run on them.
Provides compatibility with other ACPI implementations.

Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Erik Schmauss <erik.schmauss@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Bob Moore 2018-10-03 11:45:38 -07:00 committed by Rafael J. Wysocki
parent 9e9f8733a9
commit 8b1cafdcb4
5 changed files with 19 additions and 9 deletions
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2
drivers/acpi/acpica/acevents.h
View file

@ -229,6 +229,8 @@ acpi_ev_default_region_setup(acpi_handle handle,
acpi_status acpi_ev_initialize_region(union acpi_operand_object *region_obj);
u8 acpi_ev_is_pci_root_bridge(struct acpi_namespace_node *node);
/*
* evsci - SCI (System Control Interrupt) handling/dispatch
*/

2
drivers/acpi/acpica/aclocal.h
View file

@ -395,9 +395,9 @@ struct acpi_simple_repair_info {
/* Info for running the _REG methods */
struct acpi_reg_walk_info {
acpi_adr_space_type space_id;
u32 function;
u32 reg_run_count;
acpi_adr_space_type space_id;
};
/*****************************************************************************

17
drivers/acpi/acpica/evregion.c
View file

@ -653,6 +653,19 @@ acpi_ev_execute_reg_methods(struct acpi_namespace_node *node,
ACPI_FUNCTION_TRACE(ev_execute_reg_methods);
/*
* These address spaces do not need a call to _REG, since the ACPI
* specification defines them as: "must always be accessible". Since
* they never change state (never become unavailable), no need to ever
* call _REG on them. Also, a data_table is not a "real" address space,
* so do not call _REG. September 2018.
*/
if ((space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY) ||
(space_id == ACPI_ADR_SPACE_SYSTEM_IO) ||
(space_id == ACPI_ADR_SPACE_DATA_TABLE)) {
return_VOID;
}
info.space_id = space_id;
info.function = function;
info.reg_run_count = 0;
@ -714,8 +727,8 @@ acpi_ev_reg_run(acpi_handle obj_handle,
}
/*
* We only care about regions.and objects that are allowed to have address
* space handlers
* We only care about regions and objects that are allowed to have
* address space handlers
*/
if ((node->type != ACPI_TYPE_REGION) && (node != acpi_gbl_root_node)) {
return (AE_OK);

6
drivers/acpi/acpica/evrgnini.c
View file

@ -16,9 +16,6 @@
#define _COMPONENT ACPI_EVENTS
ACPI_MODULE_NAME("evrgnini")
/* Local prototypes */
static u8 acpi_ev_is_pci_root_bridge(struct acpi_namespace_node *node);
/*******************************************************************************
*
* FUNCTION: acpi_ev_system_memory_region_setup
@ -33,7 +30,6 @@ static u8 acpi_ev_is_pci_root_bridge(struct acpi_namespace_node *node);
* DESCRIPTION: Setup a system_memory operation region
*
******************************************************************************/
acpi_status
acpi_ev_system_memory_region_setup(acpi_handle handle,
u32 function,
@ -313,7 +309,7 @@ acpi_ev_pci_config_region_setup(acpi_handle handle,
*
******************************************************************************/
static u8 acpi_ev_is_pci_root_bridge(struct acpi_namespace_node *node)
u8 acpi_ev_is_pci_root_bridge(struct acpi_namespace_node *node)
{
acpi_status status;
struct acpi_pnp_device_id *hid;

1
drivers/acpi/acpica/evxfregn.c
View file

@ -193,7 +193,6 @@ acpi_remove_address_space_handler(acpi_handle device,
*/
region_obj =
handler_obj->address_space.region_list;
}
/* Remove this Handler object from the list */