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| author | Chen Yu <yu.c.chen@intel.com> | 2016-03-22 08:51:10 +0800 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2016-04-09 02:11:43 +0200 |
| commit | 1373718194ebebc43c00d8f117e03885749495b0 (patch) | |
| tree | 8fffff6302b18df6b12cbc2fc79d04c58135faff /arch/x86/platform | |
| parent | 9735a22799b9214d17d3c231fe377fc852f042e9 (diff) | |
| download | linux-1373718194ebebc43c00d8f117e03885749495b0.tar.bz2 | |
ACPI / PM: Introduce efi poweroff for HW-full platforms without _S5
The problem is Linux registers pm_power_off = efi_power_off only if
we are in hardware reduced mode. Actually, what we also want is to do
this when ACPI S5 is simply not supported on non-legacy platforms.
Since some future Intel platforms are HW-full mode where the DSDT
fails to supply an _S5 object(without SLP_TYP), we should let such
kind of platform to leverage efi runtime service to poweroff.
This patch uses efi power off as first choice when S5 is unavailable,
even if there is a customized poweroff(driver provided, eg).
Meanwhile, the legacy platforms will not be affected because there is
no path for them to overwrite the pm_power_off to efi power off.
Suggested-by: Len Brown <len.brown@intel.com>
Reviewed-by: Matt Fleming <matt@codeblueprint.co.uk>
Signed-off-by: Chen Yu <yu.c.chen@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'arch/x86/platform')
| -rw-r--r-- | arch/x86/platform/efi/quirks.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/platform/efi/quirks.c b/arch/x86/platform/efi/quirks.c index ab50ada1d56e..818d12ad7761 100644 --- a/arch/x86/platform/efi/quirks.c +++ b/arch/x86/platform/efi/quirks.c @@ -373,5 +373,5 @@ bool efi_reboot_required(void) bool efi_poweroff_required(void) { - return !!acpi_gbl_reduced_hardware; + return acpi_gbl_reduced_hardware || acpi_no_s5; } |