ath10k: implement tx checksum offloading

[cascardo/linux.git] / drivers / media / media-entity.c

diff --git a/drivers/media/media-entity.c b/drivers/media/media-entity.c
index e1cd132..cb30ffb 100644 (file)
--- a/drivers/media/media-entity.c
+++ b/drivers/media/media-entity.c
@@ -429,6 +429,56 @@ media_entity_create_link(struct media_entity *source, u16 source_pad,
 }
 EXPORT_SYMBOL_GPL(media_entity_create_link);
 
+void __media_entity_remove_links(struct media_entity *entity)
+{
+       unsigned int i;
+
+       for (i = 0; i < entity->num_links; i++) {
+               struct media_link *link = &entity->links[i];
+               struct media_entity *remote;
+               unsigned int r = 0;
+
+               if (link->source->entity == entity)
+                       remote = link->sink->entity;
+               else
+                       remote = link->source->entity;
+
+               while (r < remote->num_links) {
+                       struct media_link *rlink = &remote->links[r];
+
+                       if (rlink != link->reverse) {
+                               r++;
+                               continue;
+                       }
+
+                       if (link->source->entity == entity)
+                               remote->num_backlinks--;
+
+                       if (--remote->num_links == 0)
+                               break;
+
+                       /* Insert last entry in place of the dropped link. */
+                       *rlink = remote->links[remote->num_links];
+               }
+       }
+
+       entity->num_links = 0;
+       entity->num_backlinks = 0;
+}
+EXPORT_SYMBOL_GPL(__media_entity_remove_links);
+
+void media_entity_remove_links(struct media_entity *entity)
+{
+       /* Do nothing if the entity is not registered. */
+       if (entity->parent == NULL)
+               return;
+
+       mutex_lock(&entity->parent->graph_mutex);
+       __media_entity_remove_links(entity);
+       mutex_unlock(&entity->parent->graph_mutex);
+}
+EXPORT_SYMBOL_GPL(media_entity_remove_links);
+
 static int __media_entity_setup_link_notify(struct media_link *link, u32 flags)
 {
        int ret;
@@ -496,25 +546,17 @@ int __media_entity_setup_link(struct media_link *link, u32 flags)
 
        mdev = source->parent;
 
-       if ((flags & MEDIA_LNK_FL_ENABLED) && mdev->link_notify) {
-               ret = mdev->link_notify(link->source, link->sink,
-                                       MEDIA_LNK_FL_ENABLED);
+       if (mdev->link_notify) {
+               ret = mdev->link_notify(link, flags,
+                                       MEDIA_DEV_NOTIFY_PRE_LINK_CH);
                if (ret < 0)
                        return ret;
        }
 
        ret = __media_entity_setup_link_notify(link, flags);
-       if (ret < 0)
-               goto err;
-
-       if (!(flags & MEDIA_LNK_FL_ENABLED) && mdev->link_notify)
-               mdev->link_notify(link->source, link->sink, 0);
-
-       return 0;
 
-err:
-       if ((flags & MEDIA_LNK_FL_ENABLED) && mdev->link_notify)
-               mdev->link_notify(link->source, link->sink, 0);
+       if (mdev->link_notify)
+               mdev->link_notify(link, flags, MEDIA_DEV_NOTIFY_POST_LINK_CH);
 
        return ret;
 }
@@ -560,17 +602,16 @@ media_entity_find_link(struct media_pad *source, struct media_pad *sink)
 EXPORT_SYMBOL_GPL(media_entity_find_link);
 
 /**
- * media_entity_remote_source - Find the source pad at the remote end of a link
- * @pad: Sink pad at the local end of the link
+ * media_entity_remote_pad - Find the pad at the remote end of a link
+ * @pad: Pad at the local end of the link
  *
- * Search for a remote source pad connected to the given sink pad by iterating
- * over all links originating or terminating at that pad until an enabled link
- * is found.
+ * Search for a remote pad connected to the given pad by iterating over all
+ * links originating or terminating at that pad until an enabled link is found.
  *
  * Return a pointer to the pad at the remote end of the first found enabled
  * link, or NULL if no enabled link has been found.
  */
-struct media_pad *media_entity_remote_source(struct media_pad *pad)
+struct media_pad *media_entity_remote_pad(struct media_pad *pad)
 {
        unsigned int i;
 
@@ -590,4 +631,4 @@ struct media_pad *media_entity_remote_source(struct media_pad *pad)
        return NULL;
 
 }
-EXPORT_SYMBOL_GPL(media_entity_remote_source);
+EXPORT_SYMBOL_GPL(media_entity_remote_pad);