diff options
Diffstat (limited to 'drivers/acpi')
| -rw-r--r-- | drivers/acpi/acpica/acresrc.h | 6 | ||||
| -rw-r--r-- | drivers/acpi/acpica/nsalloc.c | 18 | ||||
| -rw-r--r-- | drivers/acpi/acpica/nsutils.c | 18 | ||||
| -rw-r--r-- | drivers/acpi/acpica/rscalc.c | 9 | ||||
| -rw-r--r-- | drivers/acpi/acpica/rscreate.c | 36 | ||||
| -rw-r--r-- | drivers/acpi/acpica/rsutils.c | 2 | ||||
| -rw-r--r-- | drivers/acpi/acpica/utdebug.c | 31 | ||||
| -rw-r--r-- | drivers/acpi/bus.c | 75 | ||||
| -rw-r--r-- | drivers/acpi/container.c | 11 | ||||
| -rw-r--r-- | drivers/acpi/device_pm.c | 22 | ||||
| -rw-r--r-- | drivers/acpi/dock.c | 9 | ||||
| -rw-r--r-- | drivers/acpi/internal.h | 7 | ||||
| -rw-r--r-- | drivers/acpi/osl.c | 6 | ||||
| -rw-r--r-- | drivers/acpi/pci_root.c | 123 | ||||
| -rw-r--r-- | drivers/acpi/scan.c | 480 |
15 files changed, 390 insertions, 463 deletions
diff --git a/drivers/acpi/acpica/acresrc.h b/drivers/acpi/acpica/acresrc.h index f691d0e4d9fa..ff97430455cb 100644 --- a/drivers/acpi/acpica/acresrc.h +++ b/drivers/acpi/acpica/acresrc.h @@ -184,7 +184,7 @@ acpi_rs_create_resource_list(union acpi_operand_object *aml_buffer, struct acpi_buffer *output_buffer); acpi_status -acpi_rs_create_aml_resources(struct acpi_resource *linked_list_buffer, +acpi_rs_create_aml_resources(struct acpi_buffer *resource_list, struct acpi_buffer *output_buffer); acpi_status @@ -227,8 +227,8 @@ acpi_rs_get_list_length(u8 * aml_buffer, u32 aml_buffer_length, acpi_size * size_needed); acpi_status -acpi_rs_get_aml_length(struct acpi_resource *linked_list_buffer, - acpi_size * size_needed); +acpi_rs_get_aml_length(struct acpi_resource *resource_list, + acpi_size resource_list_size, acpi_size * size_needed); acpi_status acpi_rs_get_pci_routing_table_length(union acpi_operand_object *package_object, diff --git a/drivers/acpi/acpica/nsalloc.c b/drivers/acpi/acpica/nsalloc.c index 243737363fb8..fd1ff54cda19 100644 --- a/drivers/acpi/acpica/nsalloc.c +++ b/drivers/acpi/acpica/nsalloc.c @@ -106,6 +106,7 @@ struct acpi_namespace_node *acpi_ns_create_node(u32 name) void acpi_ns_delete_node(struct acpi_namespace_node *node) { union acpi_operand_object *obj_desc; + union acpi_operand_object *next_desc; ACPI_FUNCTION_NAME(ns_delete_node); @@ -114,12 +115,13 @@ void acpi_ns_delete_node(struct acpi_namespace_node *node) acpi_ns_detach_object(node); /* - * Delete an attached data object if present (an object that was created - * and attached via acpi_attach_data). Note: After any normal object is - * detached above, the only possible remaining object is a data object. + * Delete an attached data object list if present (objects that were + * attached via acpi_attach_data). Note: After any normal object is + * detached above, the only possible remaining object(s) are data + * objects, in a linked list. */ obj_desc = node->object; - if (obj_desc && (obj_desc->common.type == ACPI_TYPE_LOCAL_DATA)) { + while (obj_desc && (obj_desc->common.type == ACPI_TYPE_LOCAL_DATA)) { /* Invoke the attached data deletion handler if present */ @@ -127,7 +129,15 @@ void acpi_ns_delete_node(struct acpi_namespace_node *node) obj_desc->data.handler(node, obj_desc->data.pointer); } + next_desc = obj_desc->common.next_object; acpi_ut_remove_reference(obj_desc); + obj_desc = next_desc; + } + + /* Special case for the statically allocated root node */ + + if (node == acpi_gbl_root_node) { + return; } /* Now we can delete the node */ diff --git a/drivers/acpi/acpica/nsutils.c b/drivers/acpi/acpica/nsutils.c index cc2fea94c5f0..4a0665b6bcc1 100644 --- a/drivers/acpi/acpica/nsutils.c +++ b/drivers/acpi/acpica/nsutils.c @@ -593,24 +593,26 @@ struct acpi_namespace_node *acpi_ns_validate_handle(acpi_handle handle) void acpi_ns_terminate(void) { - union acpi_operand_object *obj_desc; + acpi_status status; ACPI_FUNCTION_TRACE(ns_terminate); /* - * 1) Free the entire namespace -- all nodes and objects - * - * Delete all object descriptors attached to namepsace nodes + * Free the entire namespace -- all nodes and all objects + * attached to the nodes */ acpi_ns_delete_namespace_subtree(acpi_gbl_root_node); - /* Detach any objects attached to the root */ + /* Delete any objects attached to the root node */ - obj_desc = acpi_ns_get_attached_object(acpi_gbl_root_node); - if (obj_desc) { - acpi_ns_detach_object(acpi_gbl_root_node); + status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); + if (ACPI_FAILURE(status)) { + return_VOID; } + acpi_ns_delete_node(acpi_gbl_root_node); + (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); + ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Namespace freed\n")); return_VOID; } diff --git a/drivers/acpi/acpica/rscalc.c b/drivers/acpi/acpica/rscalc.c index b62a0f4f4f9b..b60c9cf82862 100644 --- a/drivers/acpi/acpica/rscalc.c +++ b/drivers/acpi/acpica/rscalc.c @@ -174,6 +174,7 @@ acpi_rs_stream_option_length(u32 resource_length, * FUNCTION: acpi_rs_get_aml_length * * PARAMETERS: resource - Pointer to the resource linked list + * resource_list_size - Size of the resource linked list * size_needed - Where the required size is returned * * RETURN: Status @@ -185,16 +186,20 @@ acpi_rs_stream_option_length(u32 resource_length, ******************************************************************************/ acpi_status -acpi_rs_get_aml_length(struct acpi_resource * resource, acpi_size * size_needed) +acpi_rs_get_aml_length(struct acpi_resource *resource, + acpi_size resource_list_size, acpi_size * size_needed) { acpi_size aml_size_needed = 0; + struct acpi_resource *resource_end; acpi_rs_length total_size; ACPI_FUNCTION_TRACE(rs_get_aml_length); /* Traverse entire list of internal resource descriptors */ - while (resource) { + resource_end = + ACPI_ADD_PTR(struct acpi_resource, resource, resource_list_size); + while (resource < resource_end) { /* Validate the descriptor type */ diff --git a/drivers/acpi/acpica/rscreate.c b/drivers/acpi/acpica/rscreate.c index 65f3e1c5b598..3a2ace93e62c 100644 --- a/drivers/acpi/acpica/rscreate.c +++ b/drivers/acpi/acpica/rscreate.c @@ -418,22 +418,21 @@ acpi_rs_create_pci_routing_table(union acpi_operand_object *package_object, * * FUNCTION: acpi_rs_create_aml_resources * - * PARAMETERS: linked_list_buffer - Pointer to the resource linked list - * output_buffer - Pointer to the user's buffer + * PARAMETERS: resource_list - Pointer to the resource list buffer + * output_buffer - Where the AML buffer is returned * * RETURN: Status AE_OK if okay, else a valid acpi_status code. * If the output_buffer is too small, the error will be * AE_BUFFER_OVERFLOW and output_buffer->Length will point * to the size buffer needed. * - * DESCRIPTION: Takes the linked list of device resources and - * creates a bytestream to be used as input for the - * _SRS control method. + * DESCRIPTION: Converts a list of device resources to an AML bytestream + * to be used as input for the _SRS control method. * ******************************************************************************/ acpi_status -acpi_rs_create_aml_resources(struct acpi_resource *linked_list_buffer, +acpi_rs_create_aml_resources(struct acpi_buffer *resource_list, struct acpi_buffer *output_buffer) { acpi_status status; @@ -441,16 +440,16 @@ acpi_rs_create_aml_resources(struct acpi_resource *linked_list_buffer, ACPI_FUNCTION_TRACE(rs_create_aml_resources); - ACPI_DEBUG_PRINT((ACPI_DB_INFO, "LinkedListBuffer = %p\n", - linked_list_buffer)); + /* Params already validated, no need to re-validate here */ - /* - * Params already validated, so we don't re-validate here - * - * Pass the linked_list_buffer into a module that calculates - * the buffer size needed for the byte stream. - */ - status = acpi_rs_get_aml_length(linked_list_buffer, &aml_size_needed); + ACPI_DEBUG_PRINT((ACPI_DB_INFO, "ResourceList Buffer = %p\n", + resource_list->pointer)); + + /* Get the buffer size needed for the AML byte stream */ + + status = acpi_rs_get_aml_length(resource_list->pointer, + resource_list->length, + &aml_size_needed); ACPI_DEBUG_PRINT((ACPI_DB_INFO, "AmlSizeNeeded=%X, %s\n", (u32)aml_size_needed, acpi_format_exception(status))); @@ -467,10 +466,9 @@ acpi_rs_create_aml_resources(struct acpi_resource *linked_list_buffer, /* Do the conversion */ - status = - acpi_rs_convert_resources_to_aml(linked_list_buffer, - aml_size_needed, - output_buffer->pointer); + status = acpi_rs_convert_resources_to_aml(resource_list->pointer, + aml_size_needed, + output_buffer->pointer); if (ACPI_FAILURE(status)) { return_ACPI_STATUS(status); } diff --git a/drivers/acpi/acpica/rsutils.c b/drivers/acpi/acpica/rsutils.c index aef303d56d86..14a7982c9961 100644 --- a/drivers/acpi/acpica/rsutils.c +++ b/drivers/acpi/acpica/rsutils.c @@ -753,7 +753,7 @@ acpi_rs_set_srs_method_data(struct acpi_namespace_node *node, * Convert the linked list into a byte stream */ buffer.length = ACPI_ALLOCATE_LOCAL_BUFFER; - status = acpi_rs_create_aml_resources(in_buffer->pointer, &buffer); + status = acpi_rs_create_aml_resources(in_buffer, &buffer); if (ACPI_FAILURE(status)) { goto cleanup; } diff --git a/drivers/acpi/acpica/utdebug.c b/drivers/acpi/acpica/utdebug.c index 1a67b3944b3b..03ae8affe48f 100644 --- a/drivers/acpi/acpica/utdebug.c +++ b/drivers/acpi/acpica/utdebug.c @@ -185,6 +185,7 @@ acpi_debug_print(u32 requested_debug_level, } acpi_gbl_prev_thread_id = thread_id; + acpi_gbl_nesting_level = 0; } /* @@ -193,13 +194,21 @@ acpi_debug_print(u32 requested_debug_level, */ acpi_os_printf("%9s-%04ld ", module_name, line_number); +#ifdef ACPI_EXEC_APP + /* + * For acpi_exec only, emit the thread ID and nesting level. + * Note: nesting level is really only useful during a single-thread + * execution. Otherwise, multiple threads will keep resetting the + * level. + */ if (ACPI_LV_THREADS & acpi_dbg_level) { acpi_os_printf("[%u] ", (u32)thread_id); } - acpi_os_printf("[%02ld] %-22.22s: ", - acpi_gbl_nesting_level, - acpi_ut_trim_function_name(function_name)); + acpi_os_printf("[%02ld] ", acpi_gbl_nesting_level); +#endif + + acpi_os_printf("%-22.22s: ", acpi_ut_trim_function_name(function_name)); va_start(args, format); acpi_os_vprintf(format, args); @@ -420,7 +429,9 @@ acpi_ut_exit(u32 line_number, component_id, "%s\n", acpi_gbl_fn_exit_str); } - acpi_gbl_nesting_level--; + if (acpi_gbl_nesting_level) { + acpi_gbl_nesting_level--; + } } ACPI_EXPORT_SYMBOL(acpi_ut_exit) @@ -467,7 +478,9 @@ acpi_ut_status_exit(u32 line_number, } } - acpi_gbl_nesting_level--; + if (acpi_gbl_nesting_level) { + acpi_gbl_nesting_level--; + } } ACPI_EXPORT_SYMBOL(acpi_ut_status_exit) @@ -504,7 +517,9 @@ acpi_ut_value_exit(u32 line_number, ACPI_FORMAT_UINT64(value)); } - acpi_gbl_nesting_level--; + if (acpi_gbl_nesting_level) { + acpi_gbl_nesting_level--; + } } ACPI_EXPORT_SYMBOL(acpi_ut_value_exit) @@ -540,7 +555,9 @@ acpi_ut_ptr_exit(u32 line_number, ptr); } - acpi_gbl_nesting_level--; + if (acpi_gbl_nesting_level) { + acpi_gbl_nesting_level--; + } } #endif diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c index cfea1c58f034..2c38ae22c17f 100644 --- a/drivers/acpi/bus.c +++ b/drivers/acpi/bus.c @@ -50,9 +50,6 @@ struct acpi_device *acpi_root; struct proc_dir_entry *acpi_root_dir; EXPORT_SYMBOL(acpi_root_dir); -#define STRUCT_TO_INT(s) (*((int*)&s)) - - #ifdef CONFIG_X86 static int set_copy_dsdt(const struct dmi_system_id *id) { @@ -113,18 +110,16 @@ int acpi_bus_get_status(struct acpi_device *device) if (ACPI_FAILURE(status)) return -ENODEV; - STRUCT_TO_INT(device->status) = (int) sta; + acpi_set_device_status(device, sta); if (device->status.functional && !device->status.present) { ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] status [%08x]: " "functional but not present;\n", - device->pnp.bus_id, - (u32) STRUCT_TO_INT(device->status))); + device->pnp.bus_id, (u32)sta)); } ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] status [%08x]\n", - device->pnp.bus_id, - (u32) STRUCT_TO_INT(device->status))); + device->pnp.bus_id, (u32)sta)); return 0; } EXPORT_SYMBOL(acpi_bus_get_status); @@ -327,58 +322,6 @@ static void acpi_bus_osc_support(void) Notification Handling -------------------------------------------------------------------------- */ -static void acpi_bus_check_device(acpi_handle handle) -{ - struct acpi_device *device; - acpi_status status; - struct acpi_device_status old_status; - - if (acpi_bus_get_device(handle, &device)) - return; - if (!device) - return; - - old_status = device->status; - - /* - * Make sure this device's parent is present before we go about - * messing with the device. - */ - if (device->parent && !device->parent->status.present) { - device->status = device->parent->status; - return; - } - - status = acpi_bus_get_status(device); - if (ACPI_FAILURE(status)) - return; - - if (STRUCT_TO_INT(old_status) == STRUCT_TO_INT(device->status)) - return; - - /* - * Device Insertion/Removal - */ - if ((device->status.present) && !(old_status.present)) { - ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device insertion detected\n")); - /* TBD: Handle device insertion */ - } else if (!(device->status.present) && (old_status.present)) { - ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device removal detected\n")); - /* TBD: Handle device removal */ - } -} - -static void acpi_bus_check_scope(acpi_handle handle) -{ - /* Status Change? */ - acpi_bus_check_device(handle); - - /* - * TBD: Enumerate child devices within this device's scope and - * run acpi_bus_check_device()'s on them. - */ -} - /** * acpi_bus_notify * --------------- @@ -395,19 +338,11 @@ static void acpi_bus_notify(acpi_handle handle, u32 type, void *data) switch (type) { case ACPI_NOTIFY_BUS_CHECK: - acpi_bus_check_scope(handle); - /* - * TBD: We'll need to outsource certain events to non-ACPI - * drivers via the device manager (device.c). - */ + /* TBD */ break; case ACPI_NOTIFY_DEVICE_CHECK: - acpi_bus_check_device(handle); - /* - * TBD: We'll need to outsource certain events to non-ACPI - * drivers via the device manager (device.c). - */ + /* TBD */ break; case ACPI_NOTIFY_DEVICE_WAKE: diff --git a/drivers/acpi/container.c b/drivers/acpi/container.c index e23151667655..83d232c10f13 100644 --- a/drivers/acpi/container.c +++ b/drivers/acpi/container.c @@ -44,19 +44,24 @@ static const struct acpi_device_id container_device_ids[] = { {"", 0}, }; -static int container_device_attach(struct acpi_device *device, +static int container_device_attach(struct acpi_device *adev, const struct acpi_device_id *not_used) { - /* This is necessary for container hotplug to work. */ + kobject_uevent(&adev->dev.kobj, KOBJ_ONLINE); return 1; } +static void container_device_detach(struct acpi_device *adev) +{ + kobject_uevent(&adev->dev.kobj, KOBJ_OFFLINE); +} + static struct acpi_scan_handler container_handler = { .ids = container_device_ids, .attach = container_device_attach, + .detach = container_device_detach, .hotplug = { .enabled = true, - .mode = AHM_CONTAINER, }, }; diff --git a/drivers/acpi/device_pm.c b/drivers/acpi/device_pm.c index b3480cf7db1a..d49f1e464703 100644 --- a/drivers/acpi/device_pm.c +++ b/drivers/acpi/device_pm.c @@ -256,6 +256,8 @@ int acpi_bus_init_power(struct acpi_device *device) return -EINVAL; device->power.state = ACPI_STATE_UNKNOWN; + if (!acpi_device_is_present(device)) + return 0; result = acpi_device_get_power(device, &state); if (result) @@ -302,15 +304,18 @@ int acpi_device_fix_up_power(struct acpi_device *device) return ret; } -int acpi_bus_update_power(acpi_handle handle, int *state_p) +int acpi_device_update_power(struct acpi_device *device, int *state_p) { - struct acpi_device *device; int state; int result; - result = acpi_bus_get_device(handle, &device); - if (result) + if (device->power.state == ACPI_STATE_UNKNOWN) { + result = acpi_bus_init_power(device); + if (!result && state_p) + *state_p = device->power.state; + return result; + } result = acpi_device_get_power(device, &state); if (result) @@ -338,6 +343,15 @@ int acpi_bus_update_power(acpi_handle handle, int *state_p) return 0; } + +int acpi_bus_update_power(acpi_handle handle, int *state_p) +{ + struct acpi_device *device; + int result; + + result = acpi_bus_get_device(handle, &device); + return result ? result : acpi_device_update_power(device, state_p); +} EXPORT_SYMBOL_GPL(acpi_bus_update_power); bool acpi_bus_power_manageable(acpi_handle handle) diff --git a/drivers/acpi/dock.c b/drivers/acpi/dock.c index 9ab9e783a894..8da6be99ba42 100644 --- a/drivers/acpi/dock.c +++ b/drivers/acpi/dock.c @@ -321,14 +321,11 @@ static int dock_present(struct dock_station *ds) */ static void dock_create_acpi_device(acpi_handle handle) { - struct acpi_device *device; + struct acpi_device *device = NULL; int ret; - if (acpi_bus_get_device(handle, &device)) { - /* - * no device created for this object, - * so we should create one. - */ + acpi_bus_get_device(handle, &device); + if (!acpi_device_enumerated(device)) { ret = acpi_bus_scan(handle); if (ret) pr_debug("error adding bus, %x\n", -ret); diff --git a/drivers/acpi/internal.h b/drivers/acpi/internal.h index a29739c0ba79..f4aa467c407e 100644 --- a/drivers/acpi/internal.h +++ b/drivers/acpi/internal.h @@ -28,7 +28,6 @@ int init_acpi_device_notify(void); int acpi_scan_init(void); void acpi_pci_root_init(void); void acpi_pci_link_init(void); -void acpi_pci_root_hp_init(void); void acpi_processor_init(void); void acpi_platform_init(void); int acpi_sysfs_init(void); @@ -73,6 +72,8 @@ void acpi_lpss_init(void); static inline void acpi_lpss_init(void) {} #endif +bool acpi_queue_hotplug_work(struct work_struct *work); + /* -------------------------------------------------------------------------- Device Node Initialization / Removal -------------------------------------------------------------------------- */ @@ -87,7 +88,7 @@ void acpi_device_add_finalize(struct acpi_device *device); void acpi_free_pnp_ids(struct acpi_device_pnp *pnp); int acpi_bind_one(struct device *dev, acpi_handle handle); int acpi_unbind_one(struct device *dev); -void acpi_bus_device_eject(void *data, u32 ost_src); +bool acpi_device_is_present(struct acpi_device *adev); /* -------------------------------------------------------------------------- Power Resource @@ -105,6 +106,8 @@ int acpi_power_get_inferred_state(struct acpi_device *device, int *state); int acpi_power_on_resources(struct acpi_device *device, int state); int acpi_power_transition(struct acpi_device *device, int state); +int acpi_device_update_power(struct acpi_device *device, int *state_p); + int acpi_wakeup_device_init(void); void acpi_early_processor_set_pdc(void); diff --git a/drivers/acpi/osl.c b/drivers/acpi/osl.c index 244be2affea7..7e2d8140c334 100644 --- a/drivers/acpi/osl.c +++ b/drivers/acpi/osl.c @@ -1212,6 +1212,10 @@ acpi_status acpi_hotplug_execute(acpi_hp_callback func, void *data, u32 src) return AE_OK; } +bool acpi_queue_hotplug_work(struct work_struct *work) +{ + return queue_work(kacpi_hotplug_wq, work); +} acpi_status acpi_os_create_semaphore(u32 max_units, u32 initial_units, acpi_handle * handle) @@ -1791,7 +1795,7 @@ acpi_status __init acpi_os_initialize1(void) { kacpid_wq = alloc_workqueue("kacpid", 0, 1); kacpi_notify_wq = alloc_workqueue("kacpi_notify", 0, 1); - kacpi_hotplug_wq = alloc_workqueue("kacpi_hotplug", 0, 1); + kacpi_hotplug_wq = alloc_ordered_workqueue("kacpi_hotplug", 0); BUG_ON(!kacpid_wq); BUG_ON(!kacpi_notify_wq); BUG_ON(!kacpi_hotplug_wq); diff --git a/drivers/acpi/pci_root.c b/drivers/acpi/pci_root.c index cd20f3486cfa..afafee56cf8b 100644 --- a/drivers/acpi/pci_root.c +++ b/drivers/acpi/pci_root.c @@ -49,6 +49,12 @@ static int acpi_pci_root_add(struct acpi_device *device, const struct acpi_device_id *not_used); static void acpi_pci_root_remove(struct acpi_device *device); +static int acpi_pci_root_scan_dependent(struct acpi_device *adev) +{ + acpiphp_check_host_bridge(adev->handle); + return 0; +} + #define ACPI_PCIE_REQ_SUPPORT (OSC_PCI_EXT_CONFIG_SUPPORT \ | OSC_PCI_ASPM_SUPPORT \ | OSC_PCI_CLOCK_PM_SUPPORT \ @@ -63,6 +69,10 @@ static struct acpi_scan_handler pci_root_handler = { .ids = root_device_ids, .attach = acpi_pci_root_add, .detach = acpi_pci_root_remove, + .hotplug = { + .enabled = true, + .scan_dependent = acpi_pci_root_scan_dependent, + }, }; static DEFINE_MUTEX(osc_lock); @@ -619,116 +629,9 @@ static void acpi_pci_root_remove(struct acpi_device *device) void __init acpi_pci_root_init(void) { acpi_hest_init(); - - if (!acpi_pci_disabled) { - pci_acpi_crs_quirks(); - acpi_scan_add_handler(&pci_root_handler); - } -} -/* Support root bridge hotplug */ - -static void handle_root_bridge_insertion(acpi_handle handle) -{ - struct acpi_device *device; - - if (!acpi_bus_get_device(handle, &device)) { - dev_printk(KERN_DEBUG, &device->dev, - "acpi device already exists; ignoring notify\n"); + if (acpi_pci_disabled) return; - } - - if (acpi_bus_scan(handle)) - acpi_handle_err(handle, "cannot add bridge to acpi list\n"); -} - -static void hotplug_event_root(void *data, u32 type) -{ - acpi_handle handle = data; - struct acpi_pci_root *root; - - acpi_scan_lock_acquire(); - - root = acpi_pci_find_root(handle); - - switch (type) { - case ACPI_NOTIFY_BUS_CHECK: - /* bus enumerate */ - acpi_handle_printk(KERN_DEBUG, handle, - "Bus check notify on %s\n", __func__); - if (root) - acpiphp_check_host_bridge(handle); - else - handle_root_bridge_insertion(handle); - - break; - - case ACPI_NOTIFY_DEVICE_CHECK: - /* device check */ - acpi_handle_printk(KERN_DEBUG, handle, - "Device check notify on %s\n", __func__); - if (!root) - handle_root_bridge_insertion(handle); - break; - - case ACPI_NOTIFY_EJECT_REQUEST: - /* request device eject */ - acpi_handle_printk(KERN_DEBUG, handle, - "Device eject notify on %s\n", __func__); - if (!root) - break; - - get_device(&root->device->dev); - - acpi_scan_lock_release(); - - acpi_bus_device_eject(root->device, ACPI_NOTIFY_EJECT_REQUEST); - return; - default: - acpi_handle_warn(handle, - "notify_handler: unknown event type 0x%x\n", - type); - break; - } - - acpi_scan_lock_release(); -} - -static void handle_hotplug_event_root(acpi_handle handle, u32 type, - void *context) -{ - acpi_hotplug_execute(hotplug_event_root, handle, type); -} - -static acpi_status __init -find_root_bridges(acpi_handle handle, u32 lvl, void *context, void **rv) -{ - acpi_status status; - int *count = (int *)context; - - if (!acpi_is_root_bridge(handle)) - return AE_OK; - - (*count)++; - - status = acpi_install_notify_handler(handle, ACPI_SYSTEM_NOTIFY, - handle_hotplug_event_root, NULL); - if (ACPI_FAILURE(status)) - acpi_handle_printk(KERN_DEBUG, handle, - "notify handler is not installed, exit status: %u\n", - (unsigned int)status); - else - acpi_handle_printk(KERN_DEBUG, handle, - "notify handler is installed\n"); - - return AE_OK; -} - -void __init acpi_pci_root_hp_init(void) -{ - int num = 0; - - acpi_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT, - ACPI_UINT32_MAX, find_root_bridges, NULL, &num, NULL); - printk(KERN_DEBUG "Found %d acpi root devices\n", num); + pci_acpi_crs_quirks(); + acpi_scan_add_handler_with_hotplug(&pci_root_handler, "pci_root"); } diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c index 56421a921a2b..5383c81a8a1b 100644 --- a/drivers/acpi/scan.c +++ b/drivers/acpi/scan.c @@ -12,11 +12,12 @@ #include <linux/dmi.h> #include <linux/nls.h> +#include <asm/pgtable.h> + #include "internal.h" #define _COMPONENT ACPI_BUS_COMPONENT ACPI_MODULE_NAME("scan"); -#define STRUCT_TO_INT(s) (*((int*)&s)) extern struct acpi_device *acpi_root; #define ACPI_BUS_CLASS "system_bus" @@ -25,6 +26,8 @@ extern struct acpi_device *acpi_root; #define ACPI_IS_ROOT_DEVICE(device) (!(device)->parent) +#define INVALID_ACPI_HANDLE ((acpi_handle)empty_zero_page) + /* * If set, devices will be hot-removed even if they cannot be put offline * gracefully (from the kernel's standpoint). @@ -200,13 +203,6 @@ static int acpi_scan_hot_remove(struct acpi_device *device) acpi_status status; unsigned long long sta; - /* If there is no handle, the device node has been unregistered. */ - if (!handle) { - dev_dbg(&device->dev, "ACPI handle missing\n"); - put_device(&device->dev); - return -EINVAL; - } - /* * Carry out two passes here and ignore errors in the first pass, * because if the devices in question are memory blocks and @@ -224,7 +220,6 @@ static int acpi_scan_hot_remove(struct acpi_device *device) dev_warn(errdev, "Offline disabled.\n"); acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX, acpi_bus_online, NULL, NULL, NULL); - put_device(&device->dev); return -EPERM; } acpi_bus_offline(handle, 0, (void *)false, (void **)&errdev); @@ -243,7 +238,6 @@ static int acpi_scan_hot_remove(struct acpi_device *device) acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX, acpi_bus_online, NULL, NULL, NULL); - put_device(&device->dev); return -EBUSY; } } @@ -253,10 +247,6 @@ static int acpi_scan_hot_remove(struct acpi_device *device) acpi_bus_trim(device); - /* Device node has been unregistered. */ - put_device(&device->dev); - device = NULL; - acpi_evaluate_lck(handle, 0); /* * TBD: _EJD support. @@ -283,115 +273,127 @@ static int acpi_scan_hot_remove(struct acpi_device *device) return 0; } -void acpi_bus_device_eject(void *data, u32 ost_src) +static int acpi_scan_device_not_present(struct acpi_device *adev) { - struct acpi_device *device = data; - acpi_handle handle = device->handle; - u32 ost_code = ACPI_OST_SC_NON_SPECIFIC_FAILURE; - int error; + if (!acpi_device_enumerated(adev)) { + dev_warn(&adev->dev, "Still not present\n"); + return -EALREADY; + } + acpi_bus_trim(adev); + return 0; +} - lock_device_hotplug(); - mutex_lock(&acpi_scan_lock); +static int acpi_scan_device_check(struct acpi_device *adev) +{ + int error; - if (ost_src == ACPI_NOTIFY_EJECT_REQUEST) - acpi_evaluate_hotplug_ost(handle, ACPI_NOTIFY_EJECT_REQUEST, - ACPI_OST_SC_EJECT_IN_PROGRESS, NULL); + acpi_bus_get_status(adev); + if (adev->status.present || adev->status.functional) { + /* + * This function is only called for device objects for which + * matching scan handlers exist. The only situation in which + * the scan handler is not attached to this device object yet + * is when the device has just appeared (either it wasn't + * present at all before or it was removed and then added + * again). + */ + if (adev->handler) { + dev_warn(&adev->dev, "Already enumerated\n"); + return -EALREADY; + } + error = acpi_bus_scan(adev->handle); + if (error) { + dev_warn(&adev->dev, "Namespace scan failure\n"); + return error; + } + if (!adev->handler) { + dev_warn(&adev->dev, "Enumeration failure\n"); + error = -ENODEV; + } + } else { + error = acpi_scan_device_not_present(adev); + } + return error; +} - if (device->handler && device->handler->hotplug.mode == AHM_CONTAINER) - kobject_uevent(&device->dev.kobj, KOBJ_OFFLINE); +static int acpi_scan_bus_check(struct acpi_device *adev) +{ + struct acpi_scan_handler *handler = adev->handler; + struct acpi_device *child; + int error; - error = acpi_scan_hot_remove(device); - if (error == -EPERM) { - goto err_support; - } else if (error) { - goto err_out; + acpi_bus_get_status(adev); + if (!(adev->status.present || adev->status.functional)) { + acpi_scan_device_not_present(adev); + return 0; } + if (handler && handler->hotplug.scan_dependent) + return handler->hotplug.scan_dependent(adev); - out: - mutex_unlock(&acpi_scan_lock); - unlock_device_hotplug(); - return; - - err_support: - ost_code = ACPI_OST_SC_EJECT_NOT_SUPPORTED; - err_out: - acpi_evaluate_hotplug_ost(handle, ost_src, ost_code, NULL); - goto out; + error = acpi_bus_scan(adev->handle); + if (error) { + dev_warn(&adev->dev, "Namespace scan failure\n"); + return error; + } + list_for_each_entry(child, &adev->children, node) { + error = acpi_scan_bus_check(child); + if (error) + return error; + } + return 0; } -static void acpi_scan_bus_device_check(void *data, u32 ost_source) +static void acpi_device_hotplug(void *data, u32 src) { - acpi_handle handle = data; - struct acpi_device *device = NULL; u32 ost_code = ACPI_OST_SC_NON_SPECIFIC_FAILURE; + struct acpi_device *adev = data; int error; lock_device_hotplug(); mutex_lock(&acpi_scan_lock); - if (ost_source != ACPI_NOTIFY_BUS_CHECK) { - acpi_bus_get_device(handle, &device); - if (device) { - dev_warn(&device->dev, "Attempt to re-insert\n"); - goto out; - } - } - error = acpi_bus_scan(handle); - if (error) { - acpi_handle_warn(handle, "Namespace scan failure\n"); - goto out; - } - error = acpi_bus_get_device(handle, &device); - if (error) { - acpi_handle_warn(handle, "Missing device node object\n"); + /* + * The device object's ACPI handle cannot become invalid as long as we + * are holding acpi_scan_lock, but it may have become invalid before + * that lock was acquired. + */ + if (adev->handle == INVALID_ACPI_HANDLE) goto out; - } - ost_code = ACPI_OST_SC_SUCCESS; - if (device->handler && device->handler->hotplug.mode == AHM_CONTAINER) - kobject_uevent(&device->dev.kobj, KOBJ_ONLINE); - out: - acpi_evaluate_hotplug_ost(handle, ost_source, ost_code, NULL); - mutex_unlock(&acpi_scan_lock); - unlock_device_hotplug(); -} - -static void acpi_hotplug_unsupported(acpi_handle handle, u32 type) -{ - u32 ost_status; - - switch (type) { + switch (src) { case ACPI_NOTIFY_BUS_CHECK: - acpi_handle_debug(handle, - "ACPI_NOTIFY_BUS_CHECK event: unsupported\n"); - ost_status = ACPI_OST_SC_INSERT_NOT_SUPPORTED; + error = acpi_scan_bus_check(adev); break; case ACPI_NOTIFY_DEVICE_CHECK: - acpi_handle_debug(handle, - "ACPI_NOTIFY_DEVICE_CHECK event: unsupported\n"); - ost_status = ACPI_OST_SC_INSERT_NOT_SUPPORTED; + error = acpi_scan_device_check(adev); break; case ACPI_NOTIFY_EJECT_REQUEST: - acpi_handle_debug(handle, - "ACPI_NOTIFY_EJECT_REQUEST event: unsupported\n"); - ost_status = ACPI_OST_SC_EJECT_NOT_SUPPORTED; + case ACPI_OST_EC_OSPM_EJECT: + error = acpi_scan_hot_remove(adev); break; default: - /* non-hotplug event; possibly handled by other handler */ - return; + error = -EINVAL; + break; } + if (!error) + ost_code = ACPI_OST_SC_SUCCESS; - acpi_evaluate_hotplug_ost(handle, type, ost_status, NULL); + out: + acpi_evaluate_hotplug_ost(adev->handle, src, ost_code, NULL); + put_device(&adev->dev); + mutex_unlock(&acpi_scan_lock); + unlock_device_hotplug(); } static void acpi_hotplug_notify_cb(acpi_handle handle, u32 type, void *data) { + u32 ost_code = ACPI_OST_SC_NON_SPECIFIC_FAILURE; struct acpi_scan_handler *handler = data; struct acpi_device *adev; acpi_status status; - if (!handler->hotplug.enabled) - return acpi_hotplug_unsupported(handle, type); + if (acpi_bus_get_device(handle, &adev)) + goto err_out; switch (type) { case ACPI_NOTIFY_BUS_CHECK: @@ -402,27 +404,27 @@ static void acpi_hotplug_notify_cb(acpi_handle handle, u32 type, void *data) break; case ACPI_NOTIFY_EJECT_REQUEST: acpi_handle_debug(handle, "ACPI_NOTIFY_EJECT_REQUEST event\n"); - if (acpi_bus_get_device(handle, &adev)) + if (!handler->hotplug.enabled) { + acpi_handle_err(handle, "Eject disabled\n"); + ost_code = ACPI_OST_SC_EJECT_NOT_SUPPORTED; goto err_out; - - get_device(&adev->dev); - status = acpi_hotplug_execute(acpi_bus_device_eject, adev, type); - if (ACPI_SUCCESS(status)) - return; - - put_device(&adev->dev); - goto err_out; + } + acpi_evaluate_hotplug_ost(handle, ACPI_NOTIFY_EJECT_REQUEST, + ACPI_OST_SC_EJECT_IN_PROGRESS, NULL); + break; default: /* non-hotplug event; possibly handled by other handler */ return; } - status = acpi_hotplug_execute(acpi_scan_bus_device_check, handle, type); + get_device(&adev->dev); + status = acpi_hotplug_execute(acpi_device_hotplug, adev, type); if (ACPI_SUCCESS(status)) return; + put_device(&adev->dev); + err_out: - acpi_evaluate_hotplug_ost(handle, type, - ACPI_OST_SC_NON_SPECIFIC_FAILURE, NULL); + acpi_evaluate_hotplug_ost(handle, type, ost_code, NULL); } static ssize_t real_power_state_show(struct device *dev, @@ -473,7 +475,7 @@ acpi_eject_store(struct device *d, struct device_attribute *attr, acpi_evaluate_hotplug_ost(acpi_device->handle, ACPI_OST_EC_OSPM_EJECT, ACPI_OST_SC_EJECT_IN_PROGRESS, NULL); get_device(&acpi_device->dev); - status = acpi_hotplug_execute(acpi_bus_device_eject, acpi_device, + status = acpi_hotplug_execute(acpi_device_hotplug, acpi_device, ACPI_OST_EC_OSPM_EJECT); if (ACPI_SUCCESS(status)) return count; @@ -905,9 +907,91 @@ struct bus_type acpi_bus_type = { .uevent = acpi_device_uevent, }; -static void acpi_bus_data_handler(acpi_handle handle, void *context) +static void acpi_device_del(struct acpi_device *device) { - /* Intentionally empty. */ + mutex_lock(&acpi_device_lock); + if (device->parent) + list_del(&device->node); + + list_del(&device->wakeup_list); + mutex_unlock(&acpi_device_lock); + + acpi_power_add_remove_device(device, false); + acpi_device_remove_files(device); + if (device->remove) + device->remove(device); + + device_del(&device->dev); +} + +static LIST_HEAD(acpi_device_del_list); +static DEFINE_MUTEX(acpi_device_del_lock); + +static void acpi_device_del_work_fn(struct work_struct *work_not_used) +{ + for (;;) { + struct acpi_device *adev; + + mutex_lock(&acpi_device_del_lock); + + if (list_empty(&acpi_device_del_list)) { + mutex_unlock(&acpi_device_del_lock); + break; + } + adev = list_first_entry(&acpi_device_del_list, + struct acpi_device, del_list); + list_del(&adev->del_list); + + mutex_unlock(&acpi_device_del_lock); + + acpi_device_del(adev); + /* + * Drop references to all power resources that might have been + * used by the device. + */ + acpi_power_transition(adev, ACPI_STATE_D3_COLD); + put_device(&adev->dev); + } +} + +/** + * acpi_scan_drop_device - Drop an ACPI device object. + * @handle: Handle of an ACPI namespace node, not used. + * @context: Address of the ACPI device object to drop. + * + * This is invoked by acpi_ns_delete_node() during the removal of the ACPI + * namespace node the device object pointed to by @context is attached to. + * + * The unregistration is carried out asynchronously to avoid running + * acpi_device_del() under the ACPICA's namespace mutex and the list is used to + * ensure the correct ordering (the device objects must be unregistered in the + * same order in which the corresponding namespace nodes are deleted). + */ +static void acpi_scan_drop_device(acpi_handle handle, void *context) +{ + static DECLARE_WORK(work, acpi_device_del_work_fn); + struct acpi_device *adev = context; + + mutex_lock(&acpi_device_del_lock); + + /* + * Use the ACPI hotplug workqueue which is ordered, so this work item + * won't run after any hotplug work items submitted subsequently. That + * prevents attempts to register device objects identical to those being + * deleted from happening concurrently (such attempts result from + * hotplug events handled via the ACPI hotplug workqueue). It also will + * run after all of the work items submitted previosuly, which helps + * those work items to ensure that they are not accessing stale device + * objects. + */ + if (list_empty(&acpi_device_del_list)) + acpi_queue_hotplug_work(&work); + + list_add_tail(&adev->del_list, &acpi_device_del_list); + /* Make acpi_ns_validate_handle() return NULL for this handle. */ + adev->handle = INVALID_ACPI_HANDLE; + + mutex_unlock(&acpi_device_del_lock); } int acpi_bus_get_device(acpi_handle handle, struct acpi_device **device) @@ -917,7 +1001,7 @@ int acpi_bus_get_device(acpi_handle handle, struct acpi_device **device) if (!device) return -EINVAL; - status = acpi_get_data(handle, acpi_bus_data_handler, (void **)device); + status = acpi_get_data(handle, acpi_scan_drop_device, (void **)device); if (ACPI_FAILURE(status) || !*device) { ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No context for object [%p]\n", handle)); @@ -937,7 +1021,7 @@ int acpi_device_add(struct acpi_device *device, if (device->handle) { acpi_status status; - status = acpi_attach_data(device->handle, acpi_bus_data_handler, + status = acpi_attach_data(device->handle, acpi_scan_drop_device, device); if (ACPI_FAILURE(status)) { acpi_handle_err(device->handle, @@ -955,6 +1039,7 @@ int acpi_device_add(struct acpi_device *device, INIT_LIST_HEAD(&device->node); INIT_LIST_HEAD(&device->wakeup_list); INIT_LIST_HEAD(&device->physical_node_list); + INIT_LIST_HEAD(&device->del_list); mutex_init(&device->physical_node_lock); new_bus_id = kzalloc(sizeof(struct acpi_device_bus_id), GFP_KERNEL); @@ -1018,37 +1103,10 @@ int acpi_device_add(struct acpi_device *device, mutex_unlock(&acpi_device_lock); err_detach: - acpi_detach_data(device->handle, acpi_bus_data_handler); + acpi_detach_data(device->handle, acpi_scan_drop_device); return result; } -static void acpi_device_unregister(struct acpi_device *device) -{ - mutex_lock(&acpi_device_lock); - if (device->parent) - list_del(&device->node); - - list_del(&device->wakeup_list); - mutex_unlock(&acpi_device_lock); - - acpi_detach_data(device->handle, acpi_bus_data_handler); - - acpi_power_add_remove_device(device, false); - acpi_device_remove_files(device); - if (device->remove) - device->remove(device); - - device_del(&device->dev); - /* - * Transition the device to D3cold to drop the reference counts of all - * power resources the device depends on and turn off the ones that have - * no more references. - */ - acpi_device_set_power(device, ACPI_STATE_D3_COLD); - device->handle = NULL; - put_device(&device->dev); -} - /* -------------------------------------------------------------------------- Driver Management -------------------------------------------------------------------------- */ @@ -1622,11 +1680,13 @@ void acpi_init_device_object(struct acpi_device *device, acpi_handle handle, device->device_type = type; device->handle = handle; device->parent = acpi_bus_get_parent(handle); - STRUCT_TO_INT(device->status) = sta; + acpi_set_device_status(device, sta); acpi_device_get_busid(device); acpi_set_pnp_ids(handle, &device->pnp, type); acpi_bus_get_flags(device); device->flags.match_driver = false; + device->flags.initialized = true; + device->flags.visited = false; device_initialize(&device->dev); dev_set_uevent_suppress(&device->dev, true); } @@ -1711,6 +1771,15 @@ static int acpi_bus_type_and_status(acpi_handle handle, int *type, return 0; } +bool acpi_device_is_present(struct acpi_device *adev) +{ + if (adev->status.present || adev->status.functional) + return true; + + adev->flags.initialized = false; + return false; +} + static bool acpi_scan_handler_matching(struct acpi_scan_handler *handler, char *idstr, const struct acpi_device_id **matchid) @@ -1804,18 +1873,6 @@ static acpi_status acpi_bus_check_add(acpi_handle handle, u32 lvl_not_used, acpi_scan_init_hotplug(handle, type); - if (!(sta & ACPI_STA_DEVICE_PRESENT) && - !(sta & ACPI_STA_DEVICE_FUNCTIONING)) { - struct acpi_device_wakeup wakeup; - - if (acpi_has_method(handle, "_PRW")) { - acpi_bus_extract_wakeup_device_power_package(handle, - &wakeup); - acpi_power_resources_list_free(&wakeup.resources); - } - return AE_CTRL_DEPTH; - } - acpi_add_single_object(&device, handle, type, sta); if (!device) return AE_CTRL_DEPTH; @@ -1850,36 +1907,40 @@ static int acpi_scan_attach_handler(struct acpi_device *device) return ret; } -static acpi_status acpi_bus_device_attach(acpi_handle handle, u32 lvl_not_used, - void *not_used, void **ret_not_used) +static void acpi_bus_attach(struct acpi_device *device) { - struct acpi_device *device; - unsigned long long sta_not_used; + struct acpi_device *child; int ret; - /* - * Ignore errors ignored by acpi_bus_check_add() to avoid terminating - * namespace walks prematurely. - */ - if (acpi_bus_type_and_status(handle, &ret, &sta_not_used)) - return AE_OK; - - if (acpi_bus_get_device(handle, &device)) - return AE_CTRL_DEPTH; - + acpi_bus_get_status(device); + /* Skip devices that are not present. */ + if (!acpi_device_is_present(device)) { + device->flags.visited = false; + return; + } if (device->handler) - return AE_OK; + goto ok; + if (!device->flags.initialized) { + acpi_bus_update_power(device, NULL); + device->flags.initialized = true; + } + device->flags.visited = false; ret = acpi_scan_attach_handler(device); if (ret < 0) - return AE_CTRL_DEPTH; + return; device->flags.match_driver = true; - if (ret > 0) - return AE_OK; + if (!ret) { + ret = device_attach(&device->dev); + if (ret < 0) + return; + } + device->flags.visited = true; - ret = device_attach(&device->dev); - return ret >= 0 ? AE_OK : AE_CTRL_DEPTH; + ok: + list_for_each_entry(child, &device->children, node) + acpi_bus_attach(child); } /** @@ -1899,75 +1960,48 @@ static acpi_status acpi_bus_device_attach(acpi_handle handle, u32 lvl_not_used, int acpi_bus_scan(acpi_handle handle) { void *device = NULL; - int error = 0; if (ACPI_SUCCESS(acpi_bus_check_add(handle, 0, NULL, &device))) acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX, acpi_bus_check_add, NULL, NULL, &device); - if (!device) - error = -ENODEV; - else if (ACPI_SUCCESS(acpi_bus_device_attach(handle, 0, NULL, NULL))) - acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX, - acpi_bus_device_attach, NULL, NULL, NULL); - - return error; -} -EXPORT_SYMBOL(acpi_bus_scan); - -static acpi_status acpi_bus_device_detach(acpi_handle handle, u32 lvl_not_used, - void *not_used, void **ret_not_used) -{ - struct acpi_device *device = NULL; - - if (!acpi_bus_get_device(handle, &device)) { - struct acpi_scan_handler *dev_handler = device->handler; - - if (dev_handler) { - if (dev_handler->detach) - dev_handler->detach(device); - - device->handler = NULL; - } else { - device_release_driver(&device->dev); - } + if (device) { + acpi_bus_attach(device); + return 0; } - return AE_OK; -} - -static acpi_status acpi_bus_remove(acpi_handle handle, u32 lvl_not_used, - void *not_used, void **ret_not_used) -{ - struct acpi_device *device = NULL; - - if (!acpi_bus_get_device(handle, &device)) - acpi_device_unregister(device); - - return AE_OK; + return -ENODEV; } +EXPORT_SYMBOL(acpi_bus_scan); /** - * acpi_bus_trim - Remove ACPI device node and all of its descendants - * @start: Root of the ACPI device nodes subtree to remove. + * acpi_bus_trim - Detach scan handlers and drivers from ACPI device objects. + * @adev: Root of the ACPI namespace scope to walk. * * Must be called under acpi_scan_lock. */ -void acpi_bus_trim(struct acpi_device *start) +void acpi_bus_trim(struct acpi_device *adev) { + struct acpi_scan_handler *handler = adev->handler; + struct acpi_device *child; + + list_for_each_entry_reverse(child, &adev->children, node) + acpi_bus_trim(child); + + if (handler) { + if (handler->detach) + handler->detach(adev); + + adev->handler = NULL; + } else { + device_release_driver(&adev->dev); + } /* - * Execute acpi_bus_device_detach() as a post-order callback to detach - * all ACPI drivers from the device nodes being removed. - */ - acpi_walk_namespace(ACPI_TYPE_ANY, start->handle, ACPI_UINT32_MAX, NULL, - acpi_bus_device_detach, NULL, NULL); - acpi_bus_device_detach(start->handle, 0, NULL, NULL); - /* - * Execute acpi_bus_remove() as a post-order callback to remove device - * nodes in the given namespace scope. + * Most likely, the device is going away, so put it into D3cold before + * that. */ - acpi_walk_namespace(ACPI_TYPE_ANY, start->handle, ACPI_UINT32_MAX, NULL, - acpi_bus_remove, NULL, NULL); - acpi_bus_remove(start->handle, 0, NULL, NULL); + acpi_device_set_power(adev, ACPI_STATE_D3_COLD); + adev->flags.initialized = false; + adev->flags.visited = false; } EXPORT_SYMBOL_GPL(acpi_bus_trim); @@ -2045,14 +2079,14 @@ int __init acpi_scan_init(void) result = acpi_bus_scan_fixed(); if (result) { - acpi_device_unregister(acpi_root); + acpi_detach_data(acpi_root->handle, acpi_scan_drop_device); + acpi_device_del(acpi_root); + put_device(&acpi_root->dev); goto out; } acpi_update_all_gpes(); - acpi_pci_root_hp_init(); - out: mutex_unlock(&acpi_scan_lock); return result; |