From ae00d812436dc968f4a5dea7757b6a94910b6dc4 Mon Sep 17 00:00:00 2001 From: Len Brown Date: Tue, 29 May 2007 18:43:33 -0400 Subject: ACPI: extend "acpi_osi=" boot option The boot option "acpi_osi=" has always disabled Linux _OSI support, thus disabling all OS Interface strings which are advertised by Linux to the BIOS. Now... acpi_osi="string" adds the interface string, and acpi_osi="!string" invalidates the pre-defined interface string eg. acpi_osi="!Windows 2006" would disable Linux's claim of Vista compatibility. Signed-off-by: Len Brown --- drivers/acpi/utilities/uteval.c | 27 ++++++++++++++++++++++++++- 1 file changed, 26 insertions(+), 1 deletion(-) (limited to 'drivers/acpi/utilities/uteval.c') diff --git a/drivers/acpi/utilities/uteval.c b/drivers/acpi/utilities/uteval.c index 13d5879cd98b..a10120ad6982 100644 --- a/drivers/acpi/utilities/uteval.c +++ b/drivers/acpi/utilities/uteval.c @@ -59,7 +59,7 @@ acpi_ut_translate_one_cid(union acpi_operand_object *obj_desc, /* * Strings supported by the _OSI predefined (internal) method. */ -static const char *acpi_interfaces_supported[] = { +static char *acpi_interfaces_supported[] = { /* Operating System Vendor Strings */ "Linux", @@ -156,6 +156,31 @@ acpi_status acpi_ut_osi_implementation(struct acpi_walk_state *walk_state) return_ACPI_STATUS(AE_CTRL_TERMINATE); } +/******************************************************************************* + * + * FUNCTION: acpi_osi_invalidate + * + * PARAMETERS: interface_string + * + * RETURN: Status + * + * DESCRIPTION: invalidate string in pre-defiend _OSI string list + * + ******************************************************************************/ + +acpi_status acpi_osi_invalidate(char *interface) +{ + int i; + + for (i = 0; i < ACPI_ARRAY_LENGTH(acpi_interfaces_supported); i++) { + if (!ACPI_STRCMP(interface, acpi_interfaces_supported[i])) { + *acpi_interfaces_supported[i] = '\0'; + return AE_OK; + } + } + return AE_NOT_FOUND; +} + /******************************************************************************* * * FUNCTION: acpi_ut_evaluate_object -- cgit v1.2.3