Revert "ACPI: Execute _PTS before system reboot"

Revert commit 2c85025c75df (ACPI: Execute _PTS before system reboot)
as it is reported to cause poweroff and reboot to hang on Dell
Latitude E7250.

Link: https://bugzilla.kernel.org/show_bug.cgi?id=187061
Reported-by:  Gianpaolo <gianpaoloc@gmail.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

diff --git a/drivers/acpi/sleep.c b/drivers/acpi/sleep.c
index 2b38c1bb0446d78fc97f1664615e0efc2136cad6..7a2e4d45b266724c536ce87361c7eb1a2a6e007c 100644 (file)
--- a/drivers/acpi/sleep.c
+++ b/drivers/acpi/sleep.c
@@ -47,32 +47,15 @@ static void acpi_sleep_tts_switch(u32 acpi_state)
        }
 }
 
-static void acpi_sleep_pts_switch(u32 acpi_state)
-{
-       acpi_status status;
-
-       status = acpi_execute_simple_method(NULL, "\\_PTS", acpi_state);
-       if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
-               /*
-                * OS can't evaluate the _PTS object correctly. Some warning
-                * message will be printed. But it won't break anything.
-                */
-               printk(KERN_NOTICE "Failure in evaluating _PTS object\n");
-       }
-}
-
-static int sleep_notify_reboot(struct notifier_block *this,
+static int tts_notify_reboot(struct notifier_block *this,
                        unsigned long code, void *x)
 {
        acpi_sleep_tts_switch(ACPI_STATE_S5);
-
-       acpi_sleep_pts_switch(ACPI_STATE_S5);
-
        return NOTIFY_DONE;
 }
 
-static struct notifier_block sleep_notifier = {
-       .notifier_call  = sleep_notify_reboot,
+static struct notifier_block tts_notifier = {
+       .notifier_call  = tts_notify_reboot,
        .next           = NULL,
        .priority       = 0,
 };
@@ -916,9 +899,9 @@ int __init acpi_sleep_init(void)
        pr_info(PREFIX "(supports%s)\n", supported);
 
        /*
-        * Register the sleep_notifier to reboot notifier list so that the _TTS
-        * and _PTS object can also be evaluated when the system enters S5.
+        * Register the tts_notifier to reboot notifier list so that the _TTS
+        * object can also be evaluated when the system enters S5.
         */
-       register_reboot_notifier(&sleep_notifier);
+       register_reboot_notifier(&tts_notifier);
        return 0;
 }