ACPI: OSI: Stop advertising support for "3.0 _SCP Extensions"

[ Upstream commit 8cf4fdac9bdead7bca15fc56fdecdf78d11c3ec6 ]

As specified in section 5.7.2 of the ACPI specification the feature
group string "3.0 _SCP Extensions" implies that the operating system
evaluates the _SCP control method with additional parameters.

However the ACPI thermal driver evaluates the _SCP control method
without those additional parameters, conflicting with the above
feature group string advertised to the firmware thru _OSI.

Stop advertising support for this feature string to avoid confusing
the ACPI firmware.

Fixes: e5f660ebef68 ("ACPI / osi: Collect _OSI handling into one single file")
Signed-off-by: Armin Wolf <W_Armin@gmx.de>
Link: https://patch.msgid.link/20250410165456.4173-2-W_Armin@gmx.de
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/acpi/osi.c b/drivers/acpi/osi.c
index 9f685380913849aa9b142a749aaec993737d23f7..d93409f2b2a07b6d0973070b04f39e1beb1d39ac 100644 (file)
--- a/drivers/acpi/osi.c
+++ b/drivers/acpi/osi.c
@@ -42,7 +42,6 @@ static struct acpi_osi_entry
 osi_setup_entries[OSI_STRING_ENTRIES_MAX] __initdata = {
        {"Module Device", true},
        {"Processor Device", true},
-       {"3.0 _SCP Extensions", true},
        {"Processor Aggregator Device", true},
        /*
         * Linux-Dell-Video is used by BIOS to disable RTD3 for NVidia graphics