[PATCH v3 3/7] ACPI / osi: Add acpi_osi=!! to allow reverting acpi_osi=!

From: Lv Zheng
Date: Tue May 03 2016 - 04:54:36 EST


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

Reported-and-tested-by: Lukas Wunner <lukas@xxxxxxxxx>
Tested-by: Chen Yu <yu.c.chen@xxxxxxxxx>
Signed-off-by: Lv Zheng <lv.zheng@xxxxxxxxx>
---
Documentation/kernel-parameters.txt | 2 ++
drivers/acpi/osl.c | 3 +++
2 files changed, 5 insertions(+)

diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 0b3de80..c48f387 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -312,6 +312,8 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
acpi_osi=!* # remove all strings
acpi_osi=! # disable all built-in OS vendor
strings
+ acpi_osi=!! # enable all built-in OS vendor
+ strings
acpi_osi= # disable all strings

'acpi_osi=!' can be used in combination with single or
diff --git a/drivers/acpi/osl.c b/drivers/acpi/osl.c
index cd9667f..fbedea7 100644
--- a/drivers/acpi/osl.c
+++ b/drivers/acpi/osl.c
@@ -1489,6 +1489,9 @@ void __init acpi_osi_setup(char *str)
osi->enable = false;
}
return;
+ } else if (*str == '!') {
+ osi_config.default_disabling = 0;
+ return;
}
enable = false;
}
--
1.7.10