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author | Lv Zheng <lv.zheng@intel.com> | 2013-07-22 08:08:36 (GMT) |
---|---|---|
committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2013-07-23 02:07:04 (GMT) |
commit | 741d81280ad2b31fc3d76c49fa5c1fe09f3a6f68 (patch) | |
tree | f268f5301d15f1879007788917aa9aaa7ef04cdc /drivers | |
parent | 5dc17986fdc3d2425838cb8d699152c3c30d1208 (diff) | |
download | linux-741d81280ad2b31fc3d76c49fa5c1fe09f3a6f68.tar.xz |
ACPI: Add facility to remove all _OSI strings
This patch changes the "acpi_osi=" boot parameter implementation so
that:
1. "acpi_osi=!" can be used to disable all _OSI OS vendor strings by
default. It is meaningless to specify "acpi_osi=!" multiple
times as it can only affect the default state of the target _OSI
strings.
2. "acpi_osi=!*" can be used to remove all _OSI OS vendor strings
and all _OSI feature group strings. It is useful to specify
"acpi_osi=!*" multiple times through kernel command line to
override the current state of the target _OSI strings.
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Reviewed-by: Zhang Rui <rui.zhang@intel.com>
Acked-by: Len Brown <len.brown@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/acpi/osl.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/acpi/osl.c b/drivers/acpi/osl.c index e8baa40..cc1ed12 100644 --- a/drivers/acpi/osl.c +++ b/drivers/acpi/osl.c @@ -1380,6 +1380,13 @@ void __init acpi_osi_setup(char *str) if (*str == '\0') { osi_linux.default_disabling = 1; return; + } else if (*str == '*') { + acpi_update_interfaces(ACPI_DISABLE_ALL_STRINGS); + for (i = 0; i < OSI_STRING_ENTRIES_MAX; i++) { + osi = &osi_setup_entries[i]; + osi->enable = false; + } + return; } enable = false; } |