diff options
Diffstat (limited to 'drivers/acpi/scan.c')
| -rw-r--r-- | drivers/acpi/scan.c | 72 |
1 files changed, 41 insertions, 31 deletions
diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c index f6f52c1a2ab..1f98103b53c 100644 --- a/drivers/acpi/scan.c +++ b/drivers/acpi/scan.c @@ -113,16 +113,16 @@ static int acpi_bus_hot_remove_device(void *context) if (acpi_bus_trim(device, 1)) { - ACPI_DEBUG_PRINT((ACPI_DB_ERROR, - "Removing device failed\n")); + printk(KERN_ERR PREFIX + "Removing device failed\n"); return -1; } /* power off device */ status = acpi_evaluate_object(handle, "_PS3", NULL, NULL); if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) - ACPI_DEBUG_PRINT((ACPI_DB_WARN, - "Power-off device failed\n")); + printk(KERN_WARNING PREFIX + "Power-off device failed\n"); if (device->flags.lockable) { arg_list.count = 1; @@ -276,6 +276,13 @@ int acpi_match_device_ids(struct acpi_device *device, { const struct acpi_device_id *id; + /* + * If the device is not present, it is unnecessary to load device + * driver for it. + */ + if (!device->status.present) + return -ENODEV; + if (device->flags.hardware_id) { for (id = ids; id->id[0]; id++) { if (!strcmp((char*)id->id, device->pnp.hardware_id)) @@ -477,7 +484,7 @@ static int acpi_device_register(struct acpi_device *device, result = acpi_device_setup_files(device); if(result) - ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Error creating sysfs interface for device %s\n", device->dev.bus_id)); + printk(KERN_ERR PREFIX "Error creating sysfs interface for device %s\n", device->dev.bus_id); device->removal_type = ACPI_BUS_REMOVAL_NORMAL; return 0; @@ -807,6 +814,7 @@ static int acpi_bus_get_power_flags(struct acpi_device *device) /* TBD: System wake support and resource requirements. */ device->power.state = ACPI_STATE_UNKNOWN; + acpi_bus_get_power(device->handle, &(device->power.state)); return 0; } @@ -1153,20 +1161,6 @@ static int acpi_bus_remove(struct acpi_device *dev, int rmdevice) } static int -acpi_is_child_device(struct acpi_device *device, - int (*matcher)(struct acpi_device *)) -{ - int result = -ENODEV; - - do { - if (ACPI_SUCCESS(matcher(device))) - return AE_OK; - } while ((device = device->parent)); - - return result; -} - -static int acpi_add_single_object(struct acpi_device **child, struct acpi_device *parent, acpi_handle handle, int type, struct acpi_bus_ops *ops) @@ -1221,15 +1215,18 @@ acpi_add_single_object(struct acpi_device **child, result = -ENODEV; goto end; } - if (!device->status.present) { - /* Bay and dock should be handled even if absent */ - if (!ACPI_SUCCESS( - acpi_is_child_device(device, acpi_bay_match)) && - !ACPI_SUCCESS( - acpi_is_child_device(device, acpi_dock_match))) { - result = -ENODEV; - goto end; - } + /* + * When the device is neither present nor functional, the + * device should not be added to Linux ACPI device tree. + * When the status of the device is not present but functinal, + * it should be added to Linux ACPI tree. For example : bay + * device , dock device. + * In such conditions it is unncessary to check whether it is + * bay device or dock device. + */ + if (!device->status.present && !device->status.functional) { + result = -ENODEV; + goto end; } break; default: @@ -1252,6 +1249,16 @@ acpi_add_single_object(struct acpi_device **child, acpi_device_set_id(device, parent, handle, type); /* + * The ACPI device is attached to acpi handle before getting + * the power/wakeup/peformance flags. Otherwise OS can't get + * the corresponding ACPI device by the acpi handle in the course + * of getting the power/wakeup/performance flags. + */ + result = acpi_device_set_context(device, type); + if (result) + goto end; + + /* * Power Management * ---------------- */ @@ -1281,8 +1288,6 @@ acpi_add_single_object(struct acpi_device **child, goto end; } - if ((result = acpi_device_set_context(device, type))) - goto end; result = acpi_device_register(device, parent); @@ -1402,7 +1407,12 @@ static int acpi_bus_scan(struct acpi_device *start, struct acpi_bus_ops *ops) * TBD: Need notifications and other detection mechanisms * in place before we can fully implement this. */ - if (child->status.present) { + /* + * When the device is not present but functional, it is also + * necessary to scan the children of this device. + */ + if (child->status.present || (!child->status.present && + child->status.functional)) { status = acpi_get_next_object(ACPI_TYPE_ANY, chandle, NULL, NULL); if (ACPI_SUCCESS(status)) { |