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

commit b09ad1f837a36d749555a16e9d46deccceb8babc upstream.

This reverts commit 4ad5cb65e8304c877c0176b70ee2af1b46e30a40.

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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/acpi/processor_idle.c b/drivers/acpi/processor_idle.c
index 1fd6a4a34c15420ed81cdb6519081b719814ab2f..ef6762a7cdf70c0fe9006fd07be45fba9052f3fe 100644 (file)
--- a/drivers/acpi/processor_idle.c
+++ b/drivers/acpi/processor_idle.c
@@ -95,11 +95,6 @@ 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},
        {},
 };