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ACPI / osi: Add acpi_osi=!! to allow reverting acpi_osi=! 

This patch introduces acpi_osi=!! so that quirks may use it to revert
acpi_osi=!.

Tested-by: Lukas Wunner <lukas@wunner.de>
Tested-by: Chen Yu <yu.c.chen@intel.com>
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Lv Zheng 2016-05-03 16:48:32 +08:00 committed by Rafael J. Wysocki
parent dbee890bf6
commit a707edebad
2 changed files with 5 additions and 0 deletions
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2
Documentation/kernel-parameters.txt
View File

@ -312,6 +312,8 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
acpi_osi=!* # remove all strings acpi_osi=!* # remove all strings
acpi_osi=! # disable all built-in OS vendor acpi_osi=! # disable all built-in OS vendor
strings strings
acpi_osi=!! # enable all built-in OS vendor
strings
acpi_osi= # disable all strings acpi_osi= # disable all strings
'acpi_osi=!' can be used in combination with single or 'acpi_osi=!' can be used in combination with single or

3
drivers/acpi/osl.c
View File

@ -1763,6 +1763,9 @@ void __init acpi_osi_setup(char *str)
osi->enable = false; osi->enable = false;
} }
return; return;
} else if (*str == '!') {
osi_config.default_disabling = 0;
return;
} }
enable = false; enable = false;
} }