Index: linux-2.6.21/drivers/char/apm-emulation.c
===================================================================
--- linux-2.6.21.orig/drivers/char/apm-emulation.c	2008-02-21 00:32:41.000000000 +0000
+++ linux-2.6.21/drivers/char/apm-emulation.c	2008-02-21 00:33:43.000000000 +0000
@@ -206,10 +206,18 @@
 	return ret;
 }
 
+static in_suspend;
+
 static void apm_suspend(void)
 {
 	struct apm_user *as;
-	int err = pm_suspend(PM_SUSPEND_MEM);
+	int err;
+
+	in_suspend = 1;
+
+	err = pm_suspend(PM_SUSPEND_MEM);
+
+	in_suspend = 0;
 
 	/*
 	 * Anyone on the APM queues will think we're still suspended.
@@ -663,6 +671,9 @@
 {
 	unsigned long flags;
 
+	if (in_suspend)
+		return;
+
 	spin_lock_irqsave(&kapmd_queue_lock, flags);
 	queue_add_event(&kapmd_queue, event);
 	spin_unlock_irqrestore(&kapmd_queue_lock, flags);