net: buf: Make net_buf_frag_add take ownership of the buffer

This simplify buffer handling so that no extra references are needed.

Change-Id: Id99a0a75b39ca8db2216668f76c5a672713075ae
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>

1 files changed, 10 insertions, 0 deletions

diff --git a/include/net/buf.h b/include/net/buf.h
index c39b57613..097626579 100644
--- a/include/net/buf.h
+++ b/include/net/buf.h
@@ -847,6 +847,11 @@ struct net_buf *net_buf_frag_last(struct net_buf *frags);
 
 /** @brief Insert a new fragment to a chain of bufs.
  *
+ *  Insert a new fragment into the buffer fragments list after the parent.
+ *
+ *  Note: This function takes ownership of the fragment reference so the
+ *  caller is not required to unref.
+ *
  *  @param parent Parent buffer/fragment.
  *  @param frag Fragment to insert.
  */
@@ -854,6 +859,11 @@ void net_buf_frag_insert(struct net_buf *parent, struct net_buf *frag);
 
 /** @brief Add a new fragment to the end of a chain of bufs.
  *
+ *  Append a new fragment into the buffer fragments list.
+ *
+ *  Note: This function takes ownership of the fragment reference so the
+ *  caller is not required to unref.
+ *
  *  @param head Head of the fragment chain.
  *  @param frag Fragment to add.
  *