From 035e1b362c0542174a6bf6d4ba8ab0d14396cf93 Mon Sep 17 00:00:00 2001
From: Deepthi Dharwar <deepthi@linux.vnet.ibm.com>
Date: Mon, 25 Jun 2012 23:59:54 +0200
Subject: [PATCH] --- yaml --- r: 311503 b: refs/heads/master c:
 75cc52358799bd6001e7d1a47847f997f5ae99f0 h: refs/heads/master i:   311501:
 e26e1a8428fd25947f4de50f96cb2f2a574055f5   311499:
 ed1dbe6a11b8272c52beac7eafbd38377b0cd706   311495:
 1d6cce2aebd69197f523d1f2fce2707988697b9e   311487:
 e315e1e226d8444b6c1eb0aa875253332dc2aab8 v: v3

---
 [refs]                              |  2 +-
 trunk/drivers/acpi/processor_idle.c | 32 +++++++++++++++++++++++++++--
 2 files changed, 31 insertions(+), 3 deletions(-)

diff --git a/[refs] b/[refs]
index b13414d5bb70..38e9d8e6709b 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 1f758b23177d588a71b96ad02990e715949bb82f
+refs/heads/master: 75cc52358799bd6001e7d1a47847f997f5ae99f0
diff --git a/trunk/drivers/acpi/processor_idle.c b/trunk/drivers/acpi/processor_idle.c
index f3decb30223f..47a8caa89dbe 100644
--- a/trunk/drivers/acpi/processor_idle.c
+++ b/trunk/drivers/acpi/processor_idle.c
@@ -224,6 +224,7 @@ static void lapic_timer_state_broadcast(struct acpi_processor *pr,
 /*
  * Suspend / resume control
  */
+static int acpi_idle_suspend;
 static u32 saved_bm_rld;
 
 static void acpi_idle_bm_rld_save(void)
@@ -242,13 +243,21 @@ static void acpi_idle_bm_rld_restore(void)
 
 int acpi_processor_suspend(struct acpi_device * device, pm_message_t state)
 {
+	if (acpi_idle_suspend == 1)
+		return 0;
+
 	acpi_idle_bm_rld_save();
+	acpi_idle_suspend = 1;
 	return 0;
 }
 
 int acpi_processor_resume(struct acpi_device * device)
 {
+	if (acpi_idle_suspend == 0)
+		return 0;
+
 	acpi_idle_bm_rld_restore();
+	acpi_idle_suspend = 0;
 	return 0;
 }
 
@@ -754,6 +763,12 @@ static int acpi_idle_enter_c1(struct cpuidle_device *dev,
 
 	local_irq_disable();
 
+	if (acpi_idle_suspend) {
+		local_irq_enable();
+		cpu_relax();
+		return -EBUSY;
+	}
+
 	lapic_timer_state_broadcast(pr, cx, 1);
 	kt1 = ktime_get_real();
 	acpi_idle_do_entry(cx);
@@ -823,6 +838,12 @@ static int acpi_idle_enter_simple(struct cpuidle_device *dev,
 
 	local_irq_disable();
 
+	if (acpi_idle_suspend) {
+		local_irq_enable();
+		cpu_relax();
+		return -EBUSY;
+	}
+
 	if (cx->entry_method != ACPI_CSTATE_FFH) {
 		current_thread_info()->status &= ~TS_POLLING;
 		/*
@@ -907,14 +928,21 @@ static int acpi_idle_enter_bm(struct cpuidle_device *dev,
 						drv, drv->safe_state_index);
 		} else {
 			local_irq_disable();
-			acpi_safe_halt();
+			if (!acpi_idle_suspend)
+				acpi_safe_halt();
 			local_irq_enable();
-			return -EINVAL;
+			return -EBUSY;
 		}
 	}
 
 	local_irq_disable();
 
+	if (acpi_idle_suspend) {
+		local_irq_enable();
+		cpu_relax();
+		return -EBUSY;
+	}
+
 	if (cx->entry_method != ACPI_CSTATE_FFH) {
 		current_thread_info()->status &= ~TS_POLLING;
 		/*