From 72664154e8230bf0c43d6209f07aece763a1f4a9 Mon Sep 17 00:00:00 2001
From: Len Brown <len.brown@intel.com>
Date: Fri, 6 Apr 2012 21:48:59 -0400
Subject: [PATCH] --- yaml --- r: 298871 b: refs/heads/master c:
 eeaab2d8af2cf1d36d7086f22e9de42d6dd2995c h: refs/heads/master i:   298869:
 ac5595854f41c6ac61cbaa82079ef6de008f5c06   298867:
 3414b9e352eee020b64c1c1d00af29e0a43124a6   298863:
 906e3b493774bb70d9bdfe3bed46c0ea95e8856d v: v3

---
 [refs]                              | 2 +-
 trunk/drivers/acpi/processor_idle.c | 2 +-
 trunk/drivers/cpuidle/cpuidle.c     | 5 ++++-
 3 files changed, 6 insertions(+), 3 deletions(-)

diff --git a/[refs] b/[refs]
index bbb6b5854771..9e68618f356e 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: aaef292acf3a78d9c0bb6fb72226077d286b45d7
+refs/heads/master: eeaab2d8af2cf1d36d7086f22e9de42d6dd2995c
diff --git a/trunk/drivers/acpi/processor_idle.c b/trunk/drivers/acpi/processor_idle.c
index b3447f63e46b..f3decb30223f 100644
--- a/trunk/drivers/acpi/processor_idle.c
+++ b/trunk/drivers/acpi/processor_idle.c
@@ -786,7 +786,7 @@ static int acpi_idle_play_dead(struct cpuidle_device *dev, int index)
 	while (1) {
 
 		if (cx->entry_method == ACPI_CSTATE_HALT)
-			halt();
+			safe_halt();
 		else if (cx->entry_method == ACPI_CSTATE_SYSTEMIO) {
 			inb(cx->address);
 			/* See comment in acpi_idle_do_entry() */
diff --git a/trunk/drivers/cpuidle/cpuidle.c b/trunk/drivers/cpuidle/cpuidle.c
index 87411cebc577..2f0083a51a9a 100644
--- a/trunk/drivers/cpuidle/cpuidle.c
+++ b/trunk/drivers/cpuidle/cpuidle.c
@@ -74,7 +74,7 @@ static cpuidle_enter_t cpuidle_enter_ops;
 /**
  * cpuidle_play_dead - cpu off-lining
  *
- * Only returns in case of an error
+ * Returns in case of an error or no driver
  */
 int cpuidle_play_dead(void)
 {
@@ -83,6 +83,9 @@ int cpuidle_play_dead(void)
 	int i, dead_state = -1;
 	int power_usage = -1;
 
+	if (!drv)
+		return -ENODEV;
+
 	/* Find lowest-power state that supports long-term idle */
 	for (i = CPUIDLE_DRIVER_STATE_START; i < drv->state_count; i++) {
 		struct cpuidle_state *s = &drv->states[i];