5.4-stable review patch. If anyone has any objections, please let me know.
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From: Armin Wolf W_Armin@gmx.de
[ 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 --- drivers/acpi/osi.c | 1 - 1 file changed, 1 deletion(-)
diff --git a/drivers/acpi/osi.c b/drivers/acpi/osi.c index bec0bebc7f52b..763d4b8045110 100644 --- 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