From a707edebadf1230f202000f29b28b7586ada4aa3 Mon Sep 17 00:00:00 2001
From: Lv Zheng <lv.zheng@intel.com>
Date: Tue, 3 May 2016 16:48:32 +0800
Subject: 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>
---
 drivers/acpi/osl.c | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'drivers/acpi/osl.c')

diff --git a/drivers/acpi/osl.c b/drivers/acpi/osl.c
index 9f59dd1a0af7..f801b59f2a94 100644
--- a/drivers/acpi/osl.c
+++ b/drivers/acpi/osl.c
@@ -1763,6 +1763,9 @@ void __init acpi_osi_setup(char *str)
 				osi->enable = false;
 			}
 			return;
+		} else if (*str == '!') {
+			osi_config.default_disabling = 0;
+			return;
 		}
 		enable = false;
 	}
-- 
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