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ACPICA: Never run _REG on system_memory and system_IO
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>
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5 changed files with 19 additions and 9 deletions
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@ -229,6 +229,8 @@ acpi_ev_default_region_setup(acpi_handle handle,
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acpi_status acpi_ev_initialize_region(union acpi_operand_object *region_obj);
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u8 acpi_ev_is_pci_root_bridge(struct acpi_namespace_node *node);
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/*
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* evsci - SCI (System Control Interrupt) handling/dispatch
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*/
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@ -395,9 +395,9 @@ struct acpi_simple_repair_info {
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/* Info for running the _REG methods */
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struct acpi_reg_walk_info {
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acpi_adr_space_type space_id;
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u32 function;
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u32 reg_run_count;
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acpi_adr_space_type space_id;
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};
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/*****************************************************************************
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@ -653,6 +653,19 @@ acpi_ev_execute_reg_methods(struct acpi_namespace_node *node,
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ACPI_FUNCTION_TRACE(ev_execute_reg_methods);
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/*
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* These address spaces do not need a call to _REG, since the ACPI
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* specification defines them as: "must always be accessible". Since
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* they never change state (never become unavailable), no need to ever
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* call _REG on them. Also, a data_table is not a "real" address space,
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* so do not call _REG. September 2018.
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*/
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if ((space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY) ||
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(space_id == ACPI_ADR_SPACE_SYSTEM_IO) ||
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(space_id == ACPI_ADR_SPACE_DATA_TABLE)) {
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return_VOID;
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}
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info.space_id = space_id;
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info.function = function;
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info.reg_run_count = 0;
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@ -714,8 +727,8 @@ acpi_ev_reg_run(acpi_handle obj_handle,
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}
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/*
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* We only care about regions.and objects that are allowed to have address
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* space handlers
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* We only care about regions and objects that are allowed to have
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* address space handlers
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*/
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if ((node->type != ACPI_TYPE_REGION) && (node != acpi_gbl_root_node)) {
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return (AE_OK);
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@ -16,9 +16,6 @@
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#define _COMPONENT ACPI_EVENTS
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ACPI_MODULE_NAME("evrgnini")
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/* Local prototypes */
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static u8 acpi_ev_is_pci_root_bridge(struct acpi_namespace_node *node);
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/*******************************************************************************
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*
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* FUNCTION: acpi_ev_system_memory_region_setup
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@ -33,7 +30,6 @@ static u8 acpi_ev_is_pci_root_bridge(struct acpi_namespace_node *node);
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* DESCRIPTION: Setup a system_memory operation region
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*
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******************************************************************************/
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acpi_status
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acpi_ev_system_memory_region_setup(acpi_handle handle,
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u32 function,
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@ -313,7 +309,7 @@ acpi_ev_pci_config_region_setup(acpi_handle handle,
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*
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******************************************************************************/
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static u8 acpi_ev_is_pci_root_bridge(struct acpi_namespace_node *node)
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u8 acpi_ev_is_pci_root_bridge(struct acpi_namespace_node *node)
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{
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acpi_status status;
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struct acpi_pnp_device_id *hid;
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@ -193,7 +193,6 @@ acpi_remove_address_space_handler(acpi_handle device,
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*/
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region_obj =
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handler_obj->address_space.region_list;
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}
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/* Remove this Handler object from the list */
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