X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=drivers%2Fbase%2Fcore.c;h=334ec7ef1960cf46b69a27315a1dbcccbf39dd8b;hb=4e2e986473f708be46bd00007621f97178bd7047;hp=dafae6d2f7ace1fd2941fcbc26ca50fa6450b0f9;hpb=01b944fe1cd4e21a2a9ed51adbdbafe2d5e905ba;p=firefly-linux-kernel-4.4.55.git

diff --git a/drivers/base/core.c b/drivers/base/core.c
index dafae6d2f7ac..334ec7ef1960 100644
--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -533,6 +533,52 @@ static DEVICE_ATTR_RO(dev);
 /* /sys/devices/ */
 struct kset *devices_kset;
 
+/**
+ * devices_kset_move_before - Move device in the devices_kset's list.
+ * @deva: Device to move.
+ * @devb: Device @deva should come before.
+ */
+static void devices_kset_move_before(struct device *deva, struct device *devb)
+{
+	if (!devices_kset)
+		return;
+	pr_debug("devices_kset: Moving %s before %s\n",
+		 dev_name(deva), dev_name(devb));
+	spin_lock(&devices_kset->list_lock);
+	list_move_tail(&deva->kobj.entry, &devb->kobj.entry);
+	spin_unlock(&devices_kset->list_lock);
+}
+
+/**
+ * devices_kset_move_after - Move device in the devices_kset's list.
+ * @deva: Device to move
+ * @devb: Device @deva should come after.
+ */
+static void devices_kset_move_after(struct device *deva, struct device *devb)
+{
+	if (!devices_kset)
+		return;
+	pr_debug("devices_kset: Moving %s after %s\n",
+		 dev_name(deva), dev_name(devb));
+	spin_lock(&devices_kset->list_lock);
+	list_move(&deva->kobj.entry, &devb->kobj.entry);
+	spin_unlock(&devices_kset->list_lock);
+}
+
+/**
+ * devices_kset_move_last - move the device to the end of devices_kset's list.
+ * @dev: device to move
+ */
+void devices_kset_move_last(struct device *dev)
+{
+	if (!devices_kset)
+		return;
+	pr_debug("devices_kset: Moving %s to end of list\n", dev_name(dev));
+	spin_lock(&devices_kset->list_lock);
+	list_move_tail(&dev->kobj.entry, &devices_kset->list);
+	spin_unlock(&devices_kset->list_lock);
+}
+
 /**
  * device_create_file - create sysfs attribute file for device.
  * @dev: device.
@@ -662,6 +708,9 @@ void device_initialize(struct device *dev)
 	INIT_LIST_HEAD(&dev->devres_head);
 	device_pm_init(dev);
 	set_dev_node(dev, -1);
+#ifdef CONFIG_GENERIC_MSI_IRQ
+	INIT_LIST_HEAD(&dev->msi_list);
+#endif
 }
 EXPORT_SYMBOL_GPL(device_initialize);
 
@@ -1252,6 +1301,19 @@ void device_unregister(struct device *dev)
 }
 EXPORT_SYMBOL_GPL(device_unregister);
 
+static struct device *prev_device(struct klist_iter *i)
+{
+	struct klist_node *n = klist_prev(i);
+	struct device *dev = NULL;
+	struct device_private *p;
+
+	if (n) {
+		p = to_device_private_parent(n);
+		dev = p->device;
+	}
+	return dev;
+}
+
 static struct device *next_device(struct klist_iter *i)
 {
 	struct klist_node *n = klist_next(i);
@@ -1340,6 +1402,36 @@ int device_for_each_child(struct device *parent, void *data,
 }
 EXPORT_SYMBOL_GPL(device_for_each_child);
 
+/**
+ * device_for_each_child_reverse - device child iterator in reversed order.
+ * @parent: parent struct device.
+ * @fn: function to be called for each device.
+ * @data: data for the callback.
+ *
+ * Iterate over @parent's child devices, and call @fn for each,
+ * passing it @data.
+ *
+ * We check the return of @fn each time. If it returns anything
+ * other than 0, we break out and return that value.
+ */
+int device_for_each_child_reverse(struct device *parent, void *data,
+				  int (*fn)(struct device *dev, void *data))
+{
+	struct klist_iter i;
+	struct device *child;
+	int error = 0;
+
+	if (!parent->p)
+		return 0;
+
+	klist_iter_init(&parent->p->klist_children, &i);
+	while ((child = prev_device(&i)) && !error)
+		error = fn(child, data);
+	klist_iter_exit(&i);
+	return error;
+}
+EXPORT_SYMBOL_GPL(device_for_each_child_reverse);
+
 /**
  * device_find_child - device iterator for locating a particular device.
  * @parent: parent struct device
@@ -1923,12 +2015,15 @@ int device_move(struct device *dev, struct device *new_parent,
 		break;
 	case DPM_ORDER_DEV_AFTER_PARENT:
 		device_pm_move_after(dev, new_parent);
+		devices_kset_move_after(dev, new_parent);
 		break;
 	case DPM_ORDER_PARENT_BEFORE_DEV:
 		device_pm_move_before(new_parent, dev);
+		devices_kset_move_before(new_parent, dev);
 		break;
 	case DPM_ORDER_DEV_LAST:
 		device_pm_move_last(dev);
+		devices_kset_move_last(dev);
 		break;
 	}