diff options
Diffstat (limited to 'drivers/acpi')
| -rw-r--r-- | drivers/acpi/acpica/exstorob.c | 12 | ||||
| -rw-r--r-- | drivers/acpi/blacklist.c | 5 | ||||
| -rw-r--r-- | drivers/acpi/video.c | 7 |
3 files changed, 20 insertions, 4 deletions
diff --git a/drivers/acpi/acpica/exstorob.c b/drivers/acpi/acpica/exstorob.c index 67340cc7014..257706e7734 100644 --- a/drivers/acpi/acpica/exstorob.c +++ b/drivers/acpi/acpica/exstorob.c @@ -70,6 +70,12 @@ acpi_ex_store_buffer_to_buffer(union acpi_operand_object *source_desc, ACPI_FUNCTION_TRACE_PTR(ex_store_buffer_to_buffer, source_desc); + /* If Source and Target are the same, just return */ + + if (source_desc == target_desc) { + return_ACPI_STATUS(AE_OK); + } + /* We know that source_desc is a buffer by now */ buffer = ACPI_CAST_PTR(u8, source_desc->buffer.pointer); @@ -161,6 +167,12 @@ acpi_ex_store_string_to_string(union acpi_operand_object *source_desc, ACPI_FUNCTION_TRACE_PTR(ex_store_string_to_string, source_desc); + /* If Source and Target are the same, just return */ + + if (source_desc == target_desc) { + return_ACPI_STATUS(AE_OK); + } + /* We know that source_desc is a string by now */ buffer = ACPI_CAST_PTR(u8, source_desc->string.pointer); diff --git a/drivers/acpi/blacklist.c b/drivers/acpi/blacklist.c index f6baa77deef..0c4ca4d318b 100644 --- a/drivers/acpi/blacklist.c +++ b/drivers/acpi/blacklist.c @@ -78,9 +78,10 @@ static struct acpi_blacklist_item acpi_blacklist[] __initdata = { static int __init blacklist_by_year(void) { - int year = dmi_get_year(DMI_BIOS_DATE); + int year; + /* Doesn't exist? Likely an old system */ - if (year == -1) { + if (!dmi_get_date(DMI_BIOS_DATE, &year, NULL, NULL)) { printk(KERN_ERR PREFIX "no DMI BIOS year, " "acpi=force is required to enable ACPI\n" ); return 1; diff --git a/drivers/acpi/video.c b/drivers/acpi/video.c index 8851315ce85..60ea984c84a 100644 --- a/drivers/acpi/video.c +++ b/drivers/acpi/video.c @@ -2004,8 +2004,11 @@ static int acpi_video_bus_put_one_device(struct acpi_video_device *device) status = acpi_remove_notify_handler(device->dev->handle, ACPI_DEVICE_NOTIFY, acpi_video_device_notify); - sysfs_remove_link(&device->backlight->dev.kobj, "device"); - backlight_device_unregister(device->backlight); + if (device->backlight) { + sysfs_remove_link(&device->backlight->dev.kobj, "device"); + backlight_device_unregister(device->backlight); + device->backlight = NULL; + } if (device->cdev) { sysfs_remove_link(&device->dev->dev.kobj, "thermal_cooling"); |