Re: [PATCH 1/2] acpi/video: Load the module even if ACPI is disabled

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On Sun, Mar 01, 2015 at 10:41:37AM +0000, Chris Wilson wrote:
> i915.ko depends upon the acpi/video.ko module and so refuses to load if
> ACPI is disabled at runtime if for example the BIOS is broken beyond
> repair. acpi/video provides an optional service for i915.ko and so we
> should just allow the modules to load, but do no nothing in order to let
> the machines boot correctly.
> 
> Reported-by: Bill Augur <bill-auger@xxxxxxxxxxxxxx>
> Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
> Cc: Daniel Vetter <daniel.vetter@xxxxxxxx>
> Cc: Jani Nikula <jani.nikula@xxxxxxxxx>
> Cc: Zhang Rui <rui.zhang@xxxxxxxxx>
> Cc: "Rafael J. Wysocki" <rjw@xxxxxxxxxxxxx>
> Cc: Len Brown <lenb@xxxxxxxxxx>
> Cc: linux-acpi@xxxxxxxxxxxxxxx
> Cc: linux-kernel@xxxxxxxxxxxxxxx
> Cc: stable@xxxxxxxxxxxxxxx

For both patches:
Acked-by: Aaron Lu <aaron.lu@xxxxxxxxx>

Thanks,
Aaron

> ---
>  drivers/acpi/video.c | 10 ++++++++++
>  1 file changed, 10 insertions(+)
> 
> diff --git a/drivers/acpi/video.c b/drivers/acpi/video.c
> index debd30917010..3b76aef79a1c 100644
> --- a/drivers/acpi/video.c
> +++ b/drivers/acpi/video.c
> @@ -2176,6 +2176,16 @@ 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())
> -- 
> 2.1.4
> 
> --
> To unsubscribe from this list: send the line "unsubscribe linux-acpi" in
> the body of a message to majordomo@xxxxxxxxxxxxxxx
> More majordomo info at  http://vger.kernel.org/majordomo-info.html
--
To unsubscribe from this list: send the line "unsubscribe linux-acpi" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html




[Index of Archives]     [Linux IBM ACPI]     [Linux Power Management]     [Linux Kernel]     [Linux Laptop]     [Kernel Newbies]     [Share Photos]     [Security]     [Netfilter]     [Bugtraq]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Samba]     [Video 4 Linux]     [Device Mapper]     [Linux Resources]

  Powered by Linux