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Merge branch 'acpi-video'

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* acpi-video:
  ACPI / video: Propagate the error code for acpi_video_register
  ACPI / video: Load the module even if ACPI is disabled
This commit is contained in:
Rafael J. Wysocki 2015-03-06 01:29:16 +01:00
commit 1e3e770cfb
1 changed files with 16 additions and 4 deletions
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20
drivers/acpi/video.c
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@ -2110,7 +2110,8 @@ static int __init intel_opregion_present(void)
int acpi_video_register(void)
{
int result = 0;
int ret;
if (register_count) {
/*
* if the function of acpi_video_register is already called,
@ -2122,9 +2123,9 @@ int acpi_video_register(void)
mutex_init(&video_list_lock);
INIT_LIST_HEAD(&video_bus_head);
result = acpi_bus_register_driver(&acpi_video_bus);
if (result < 0)
return -ENODEV;
ret = acpi_bus_register_driver(&acpi_video_bus);
if (ret)
return ret;
/*
* When the acpi_video_bus is loaded successfully, increase
@ -2176,6 +2177,17 @@ EXPORT_SYMBOL(acpi_video_unregister_backlight);
static int __init acpi_video_init(void)
{
/*
* Let the module load even if ACPI is disabled (e.g. due to
* a broken BIOS) so that i915.ko can still be loaded on such
* old systems without an AcpiOpRegion.
*
* acpi_video_register() will report -ENODEV later as well due
* to acpi_disabled when i915.ko tries to register itself afterwards.
*/
if (acpi_disabled)
return 0;
dmi_check_system(video_dmi_table);
if (intel_opregion_present())