Revert "ACPI: processor: idle: fix lockup regression on 32-bit ThinkPad T40"

This reverts commit bfe55a1f7fd6bfede16078bf04c6250fbca11588.

This was presumably misdiagnosed as an inability to use C3 at
all when I suspect the real problem is just misconfiguration of
C3 vs. ARB_DIS.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: 5.16+ <stable@vger.kernel.org> # 5.16+
Tested-by: Woody Suwalski <wsuwalski@gmail.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

diff --git a/drivers/acpi/processor_idle.c b/drivers/acpi/processor_idle.c
index 5f296e0..eb95e18 100644 (file)
--- a/drivers/acpi/processor_idle.c
+++ b/drivers/acpi/processor_idle.c
@@ -96,11 +96,6 @@ static const struct dmi_system_id processor_power_dmi_table[] = {
          DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."),
          DMI_MATCH(DMI_PRODUCT_NAME,"L8400B series Notebook PC")},
         (void *)1},
-       /* T40 can not handle C3 idle state */
-       { set_max_cstate, "IBM ThinkPad T40", {
-         DMI_MATCH(DMI_SYS_VENDOR, "IBM"),
-         DMI_MATCH(DMI_PRODUCT_NAME, "23737CU")},
-        (void *)2},
        {},
 };