Merge tag 'clang-format-for-linus-v5.1-rc5' of git://github.com/ojeda/linux

[linux.git] / sound / hda / hdac_sysfs.c

diff --git a/sound/hda/hdac_sysfs.c b/sound/hda/hdac_sysfs.c
index 3c2d45ee6ab8f8e2c7cb8d2d925052ad8474e2d0..fb2aa344981e67e65db2aaf6da0fd0af922d0c2d 100644 (file)
--- a/sound/hda/hdac_sysfs.c
+++ b/sound/hda/hdac_sysfs.c
@@ -415,3 +415,50 @@ void hda_widget_sysfs_exit(struct hdac_device *codec)
 {
        widget_tree_free(codec);
 }
+
+int hda_widget_sysfs_reinit(struct hdac_device *codec,
+                           hda_nid_t start_nid, int num_nodes)
+{
+       struct hdac_widget_tree *tree;
+       hda_nid_t end_nid = start_nid + num_nodes;
+       hda_nid_t nid;
+       int i;
+
+       if (!codec->widgets)
+               return hda_widget_sysfs_init(codec);
+
+       tree = kmemdup(codec->widgets, sizeof(*tree), GFP_KERNEL);
+       if (!tree)
+               return -ENOMEM;
+
+       tree->nodes = kcalloc(num_nodes + 1, sizeof(*tree->nodes), GFP_KERNEL);
+       if (!tree->nodes) {
+               kfree(tree);
+               return -ENOMEM;
+       }
+
+       /* prune non-existing nodes */
+       for (i = 0, nid = codec->start_nid; i < codec->num_nodes; i++, nid++) {
+               if (nid < start_nid || nid >= end_nid)
+                       free_widget_node(codec->widgets->nodes[i],
+                                        &widget_node_group);
+       }
+
+       /* add new nodes */
+       for (i = 0, nid = start_nid; i < num_nodes; i++, nid++) {
+               if (nid < codec->start_nid || nid >= codec->end_nid)
+                       add_widget_node(tree->root, nid, &widget_node_group,
+                                       &tree->nodes[i]);
+               else
+                       tree->nodes[i] =
+                               codec->widgets->nodes[nid - codec->start_nid];
+       }
+
+       /* replace with the new tree */
+       kfree(codec->widgets->nodes);
+       kfree(codec->widgets);
+       codec->widgets = tree;
+
+       kobject_uevent(tree->root, KOBJ_CHANGE);
+       return 0;
+}