Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux

Pull ACPI & power management update from Len Brown:
 "Re-write of the turbostat tool.
     lower overhead was necessary for measuring very large system when
     they are very idle.

  IVB support in intel_idle
     It's what I run on my IVB, others should be able to also:-)

  ACPICA core update
     We have found some bugs due to divergence between Linux and the
     upstream ACPICA base.  Most of these patches are to reduce that
     divergence to reduce the risk of future bugs.

  Some cpuidle updates, mostly for non-Intel
     More will be coming, as they depend on this part.

  Some thermal management changes needed by non-ACPI systems.

  Some _OST (OS Status Indication) updates for hot ACPI hot-plug."

* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux: (51 commits)
  Thermal: Documentation update
  Thermal: Add Hysteresis attributes
  Thermal: Make Thermal trip points writeable
  ACPI/AC: prevent OOPS on some boxes due to missing check power_supply_register() return value check
  tools/power: turbostat: fix large c1% issue
  tools/power: turbostat v2 - re-write for efficiency
  ACPICA: Update to version 20120711
  ACPICA: AcpiSrc: Fix some translation issues for Linux conversion
  ACPICA: Update header files copyrights to 2012
  ACPICA: Add new ACPI table load/unload external interfaces
  ACPICA: Split file: tbxface.c -> tbxfload.c
  ACPICA: Add PCC address space to space ID decode function
  ACPICA: Fix some comment fields
  ACPICA: Table manager: deploy new firmware error/warning interfaces
  ACPICA: Add new interfaces for BIOS(firmware) errors and warnings
  ACPICA: Split exception code utilities to a new file, utexcep.c
  ACPI: acpi_pad: tune round_robin_time
  ACPICA: Update to version 20120620
  ACPICA: Add support for implicit notify on multiple devices
  ACPICA: Update comments; no functional change
  ...

1 files changed, 49 insertions, 9 deletions

diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
index fdda49336560..d1ecca2b641a 100644
--- a/drivers/acpi/scan.c
+++ b/drivers/acpi/scan.c
@@ -83,19 +83,29 @@ acpi_device_modalias_show(struct device *dev, struct device_attribute *attr, cha
 }
 static DEVICE_ATTR(modalias, 0444, acpi_device_modalias_show, NULL);
 
-static void acpi_bus_hot_remove_device(void *context)
+/**
+ * acpi_bus_hot_remove_device: hot-remove a device and its children
+ * @context: struct acpi_eject_event pointer (freed in this func)
+ *
+ * Hot-remove a device and its children. This function frees up the
+ * memory space passed by arg context, so that the caller may call
+ * this function asynchronously through acpi_os_hotplug_execute().
+ */
+void acpi_bus_hot_remove_device(void *context)
 {
+	struct acpi_eject_event *ej_event = (struct acpi_eject_event *) context;
 	struct acpi_device *device;
-	acpi_handle handle = context;
+	acpi_handle handle = ej_event->handle;
 	struct acpi_object_list arg_list;
 	union acpi_object arg;
 	acpi_status status = AE_OK;
+	u32 ost_code = ACPI_OST_SC_NON_SPECIFIC_FAILURE; /* default */
 
 	if (acpi_bus_get_device(handle, &device))
-		return;
+		goto err_out;
 
 	if (!device)
-		return;
+		goto err_out;
 
 	ACPI_DEBUG_PRINT((ACPI_DB_INFO,
 		"Hot-removing device %s...\n", dev_name(&device->dev)));
@@ -103,7 +113,7 @@ static void acpi_bus_hot_remove_device(void *context)
 	if (acpi_bus_trim(device, 1)) {
 		printk(KERN_ERR PREFIX
 				"Removing device failed\n");
-		return;
+		goto err_out;
 	}
 
 	/* power off device */
@@ -129,10 +139,21 @@ static void acpi_bus_hot_remove_device(void *context)
 	 * TBD: _EJD support.
 	 */
 	status = acpi_evaluate_object(handle, "_EJ0", &arg_list, NULL);
-	if (ACPI_FAILURE(status))
-		printk(KERN_WARNING PREFIX
-				"Eject device failed\n");
+	if (ACPI_FAILURE(status)) {
+		if (status != AE_NOT_FOUND)
+			printk(KERN_WARNING PREFIX
+					"Eject device failed\n");
+		goto err_out;
+	}
+
+	kfree(context);
+	return;
 
+err_out:
+	/* Inform firmware the hot-remove operation has completed w/ error */
+	(void) acpi_evaluate_hotplug_ost(handle,
+				ej_event->event, ost_code, NULL);
+	kfree(context);
 	return;
 }
 
@@ -144,6 +165,7 @@ acpi_eject_store(struct device *d, struct device_attribute *attr,
 	acpi_status status;
 	acpi_object_type type = 0;
 	struct acpi_device *acpi_device = to_acpi_device(d);
+	struct acpi_eject_event *ej_event;
 
 	if ((!count) || (buf[0] != '1')) {
 		return -EINVAL;
@@ -160,7 +182,25 @@ acpi_eject_store(struct device *d, struct device_attribute *attr,
 		goto err;
 	}
 
-	acpi_os_hotplug_execute(acpi_bus_hot_remove_device, acpi_device->handle);
+	ej_event = kmalloc(sizeof(*ej_event), GFP_KERNEL);
+	if (!ej_event) {
+		ret = -ENOMEM;
+		goto err;
+	}
+
+	ej_event->handle = acpi_device->handle;
+	if (acpi_device->flags.eject_pending) {
+		/* event originated from ACPI eject notification */
+		ej_event->event = ACPI_NOTIFY_EJECT_REQUEST;
+		acpi_device->flags.eject_pending = 0;
+	} else {
+		/* event originated from user */
+		ej_event->event = ACPI_OST_EC_OSPM_EJECT;
+		(void) acpi_evaluate_hotplug_ost(ej_event->handle,
+			ej_event->event, ACPI_OST_SC_EJECT_IN_PROGRESS, NULL);
+	}
+
+	acpi_os_hotplug_execute(acpi_bus_hot_remove_device, (void *)ej_event);
 err:
 	return ret;
 }