Power management and ACPI fixes for 3.11-rc2

- Two cpufreq commits from the 3.10 cycle introduced regressions.
   The first of them was buggy (it did way much more than it needed
   to do) and the second one attempted to fix an issue introduced by
   the first one.  Fixes from Srivatsa S Bhat revert both.
 
 - If autosleep triggers during system shutdown and the shutdown
   callbacks of some device drivers have been called already, it may
   crash the system.  Fix from Liu Shuo prevents that from happening
   by making try_to_suspend() check system_state.
 
 - The ACPI memory hotplug driver doesn't clear its driver_data on
   errors which may cause a NULL poiter dereference to happen later.
   Fix from Toshi Kani.
 
 - The ACPI namespace scanning code should not try to attach scan
   handlers to device objects that have them already, which may confuse
   things quite a bit, and it should rescan the whole namespace branch
   starting at the given node after receiving a bus check notify event
   even if the device at that particular node has been discovered
   already.  Fixes from Rafael J Wysocki.
 
 - New ACPI video blacklist entry for a system whose initial backlight
   setting from the BIOS doesn't make sense.  From Lan Tianyu.
 
 - Garbage string output avoindance for ACPI PNP from Liu Shuo.
 
 - Two Kconfig fixes for issues introduced recently in the s3c24xx
   cpufreq driver (when moving the driver to drivers/cpufreq) from
   Paul Bolle.
 
 - Trivial comment fix in pm_wakeup.h from Chanwoo Choi.
 
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Merge tag 'pm+acpi-3.11-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull power management and ACPI fixes from Rafael Wysocki:
 "These are fixes collected over the last week, most importnatly two
  cpufreq reverts fixing regressions introduced in 3.10, an autoseelp
  fix preventing systems using it from crashing during shutdown and two
  ACPI scan fixes related to hotplug.

  Specifics:

   - Two cpufreq commits from the 3.10 cycle introduced regressions.
     The first of them was buggy (it did way much more than it needed to
     do) and the second one attempted to fix an issue introduced by the
     first one.  Fixes from Srivatsa S Bhat revert both.

   - If autosleep triggers during system shutdown and the shutdown
     callbacks of some device drivers have been called already, it may
     crash the system.  Fix from Liu Shuo prevents that from happening
     by making try_to_suspend() check system_state.

   - The ACPI memory hotplug driver doesn't clear its driver_data on
     errors which may cause a NULL poiter dereference to happen later.
     Fix from Toshi Kani.

   - The ACPI namespace scanning code should not try to attach scan
     handlers to device objects that have them already, which may
     confuse things quite a bit, and it should rescan the whole
     namespace branch starting at the given node after receiving a bus
     check notify event even if the device at that particular node has
     been discovered already.  Fixes from Rafael J Wysocki.

   - New ACPI video blacklist entry for a system whose initial backlight
     setting from the BIOS doesn't make sense.  From Lan Tianyu.

   - Garbage string output avoindance for ACPI PNP from Liu Shuo.

   - Two Kconfig fixes for issues introduced recently in the s3c24xx
     cpufreq driver (when moving the driver to drivers/cpufreq) from
     Paul Bolle.

   - Trivial comment fix in pm_wakeup.h from Chanwoo Choi"

* tag 'pm+acpi-3.11-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  ACPI / video: ignore BIOS initial backlight value for Fujitsu E753
  PNP / ACPI: avoid garbage in resource name
  cpufreq: Revert commit 2f7021a8 to fix CPU hotplug regression
  cpufreq: s3c24xx: fix "depends on ARM_S3C24XX" in Kconfig
  cpufreq: s3c24xx: rename CONFIG_CPU_FREQ_S3C24XX_DEBUGFS
  PM / Sleep: Fix comment typo in pm_wakeup.h
  PM / Sleep: avoid 'autosleep' in shutdown progress
  cpufreq: Revert commit a66b2e to fix suspend/resume regression
  ACPI / memhotplug: Fix a stale pointer in error path
  ACPI / scan: Always call acpi_bus_scan() for bus check notifications
  ACPI / scan: Do not try to attach scan handlers to devices having them

arch/arm/mach-s3c24xx/Kconfig

@@ -208,7 +208,7 @@ config S3C24XX_GPIO_EXTRA128
 
 config S3C24XX_PLL
 	bool "Support CPUfreq changing of PLL frequency (EXPERIMENTAL)"
-	depends on ARM_S3C24XX
+	depends on ARM_S3C24XX_CPUFREQ
 	help
 	  Compile in support for changing the PLL frequency from the
 	  S3C24XX series CPUfreq driver. The PLL takes time to settle

drivers/acpi/acpi_memhotplug.c

@@ -323,6 +323,7 @@ static int acpi_memory_device_add(struct acpi_device *device,
 	/* Get the range from the _CRS */
 	result = acpi_memory_get_device_resources(mem_device);
 	if (result) {
+		device->driver_data = NULL;
 		kfree(mem_device);
 		return result;
 	}

drivers/acpi/scan.c

@@ -352,10 +352,12 @@ static void acpi_scan_bus_device_check(acpi_handle handle, u32 ost_source)
 	mutex_lock(&acpi_scan_lock);
 	lock_device_hotplug();
 
-	acpi_bus_get_device(handle, &device);
-	if (device) {
-		dev_warn(&device->dev, "Attempt to re-insert\n");
-		goto out;
+	if (ost_source != ACPI_NOTIFY_BUS_CHECK) {
+		acpi_bus_get_device(handle, &device);
+		if (device) {
+			dev_warn(&device->dev, "Attempt to re-insert\n");
+			goto out;
+		}
 	}
 	acpi_evaluate_hotplug_ost(handle, ost_source,
 				  ACPI_OST_SC_INSERT_IN_PROGRESS, NULL);
@@ -1981,6 +1983,9 @@ static acpi_status acpi_bus_device_attach(acpi_handle handle, u32 lvl_not_used,
 	if (acpi_bus_get_device(handle, &device))
 		return AE_CTRL_DEPTH;
 
+	if (device->handler)
+		return AE_OK;
+
 	ret = acpi_scan_attach_handler(device);
 	if (ret)
 		return ret > 0 ? AE_OK : AE_CTRL_DEPTH;

drivers/acpi/video.c

@@ -448,6 +448,14 @@ static struct dmi_system_id video_dmi_table[] __initdata = {
 		DMI_MATCH(DMI_PRODUCT_NAME, "HP Folio 13 - 2000 Notebook PC"),
 		},
 	},
+	{
+	 .callback = video_ignore_initial_backlight,
+	 .ident = "Fujitsu E753",
+	 .matches = {
+		DMI_MATCH(DMI_BOARD_VENDOR, "FUJITSU"),
+		DMI_MATCH(DMI_PRODUCT_NAME, "LIFEBOOK E753"),
+		},
+	},
 	{
 	 .callback = video_ignore_initial_backlight,
 	 .ident = "HP Pavilion dm4",

drivers/cpufreq/cpufreq.c

@@ -1942,13 +1942,15 @@ static int cpufreq_cpu_callback(struct notifier_block *nfb,
 	if (dev) {
 		switch (action) {
 		case CPU_ONLINE:
+		case CPU_ONLINE_FROZEN:
 			cpufreq_add_dev(dev, NULL);
 			break;
 		case CPU_DOWN_PREPARE:
-		case CPU_UP_CANCELED_FROZEN:
+		case CPU_DOWN_PREPARE_FROZEN:
 			__cpufreq_remove_dev(dev, NULL);
 			break;
 		case CPU_DOWN_FAILED:
+		case CPU_DOWN_FAILED_FROZEN:
 			cpufreq_add_dev(dev, NULL);
 			break;
 		}

drivers/cpufreq/cpufreq_governor.c

@@ -25,7 +25,6 @@
 #include <linux/slab.h>
 #include <linux/types.h>
 #include <linux/workqueue.h>
-#include <linux/cpu.h>
 
 #include "cpufreq_governor.h"
 
@@ -137,10 +136,8 @@ void gov_queue_work(struct dbs_data *dbs_data, struct cpufreq_policy *policy,
 	if (!all_cpus) {
 		__gov_queue_work(smp_processor_id(), dbs_data, delay);
 	} else {
-		get_online_cpus();
 		for_each_cpu(i, policy->cpus)
 			__gov_queue_work(i, dbs_data, delay);
-		put_online_cpus();
 	}
 }
 EXPORT_SYMBOL_GPL(gov_queue_work);

drivers/cpufreq/cpufreq_stats.c

@@ -353,13 +353,11 @@ static int cpufreq_stat_cpu_callback(struct notifier_block *nfb,
 		cpufreq_update_policy(cpu);
 		break;
 	case CPU_DOWN_PREPARE:
+	case CPU_DOWN_PREPARE_FROZEN:
 		cpufreq_stats_free_sysfs(cpu);
 		break;
 	case CPU_DEAD:
-		cpufreq_stats_free_table(cpu);
-		break;
-	case CPU_UP_CANCELED_FROZEN:
-		cpufreq_stats_free_sysfs(cpu);
+	case CPU_DEAD_FROZEN:
 		cpufreq_stats_free_table(cpu);
 		break;
 	}

drivers/cpufreq/s3c24xx-cpufreq.c

@@ -49,7 +49,7 @@ static struct clk *clk_hclk;
 static struct clk *clk_pclk;
 static struct clk *clk_arm;
 
-#ifdef CONFIG_CPU_FREQ_S3C24XX_DEBUGFS
+#ifdef CONFIG_ARM_S3C24XX_CPUFREQ_DEBUGFS
 struct s3c_cpufreq_config *s3c_cpufreq_getconfig(void)
 {
 	return &cpu_cur;
@@ -59,7 +59,7 @@ struct s3c_iotimings *s3c_cpufreq_getiotimings(void)
 {
 	return &s3c24xx_iotiming;
 }
-#endif /* CONFIG_CPU_FREQ_S3C24XX_DEBUGFS */
+#endif /* CONFIG_ARM_S3C24XX_CPUFREQ_DEBUGFS */
 
 static void s3c_cpufreq_getcur(struct s3c_cpufreq_config *cfg)
 {

drivers/pnp/pnpacpi/rsparser.c

@@ -180,7 +180,7 @@ static acpi_status pnpacpi_allocated_resource(struct acpi_resource *res,
 	struct pnp_dev *dev = data;
 	struct acpi_resource_dma *dma;
 	struct acpi_resource_vendor_typed *vendor_typed;
-	struct resource r;
+	struct resource r = {0};
 	int i, flags;
 
 	if (acpi_dev_resource_memory(res, &r)

drivers/pnp/resource.c

@@ -515,6 +515,7 @@ struct pnp_resource *pnp_add_resource(struct pnp_dev *dev,
 	}
 
 	pnp_res->res = *res;
+	pnp_res->res.name = dev->name;
 	dev_dbg(&dev->dev, "%pR\n", res);
 	return pnp_res;
 }

include/linux/pm_wakeup.h

@@ -36,8 +36,8 @@
  * @last_time: Monotonic clock when the wakeup source's was touched last time.
  * @prevent_sleep_time: Total time this source has been preventing autosleep.
  * @event_count: Number of signaled wakeup events.
- * @active_count: Number of times the wakeup sorce was activated.
- * @relax_count: Number of times the wakeup sorce was deactivated.
+ * @active_count: Number of times the wakeup source was activated.
+ * @relax_count: Number of times the wakeup source was deactivated.
  * @expire_count: Number of times the wakeup source's timeout has expired.
  * @wakeup_count: Number of times the wakeup source might abort suspend.
  * @active: Status of the wakeup source.

kernel/power/autosleep.c

@@ -32,7 +32,8 @@ static void try_to_suspend(struct work_struct *work)
 
 	mutex_lock(&autosleep_lock);
 
-	if (!pm_save_wakeup_count(initial_count)) {
+	if (!pm_save_wakeup_count(initial_count) ||
+		system_state != SYSTEM_RUNNING) {
 		mutex_unlock(&autosleep_lock);
 		goto out;
 	}