[Bluetooth] Add hci_recv_fragment() helper function

Most drivers must handle fragmented HCI data packets and events. This
patch adds a generic function for their reassembly to the Bluetooth
core layer and thus allows to shrink the complexity of the drivers.

Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

1 files changed, 3 insertions, 0 deletions

diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h
index c0fc39620f36..7c78744ec0fd 100644
--- a/include/net/bluetooth/hci_core.h
+++ b/include/net/bluetooth/hci_core.h
@@ -109,6 +109,7 @@ struct hci_dev {
         struct sk_buff_head     cmd_q;
 
         struct sk_buff          *sent_cmd;
+        struct sk_buff          *reassembly[3];
 
         struct semaphore        req_lock;
         wait_queue_head_t       req_wait_q;
@@ -437,6 +438,8 @@ static inline int hci_recv_frame(struct sk_buff *skb)
         return 0;
 }
 
+int hci_recv_fragment(struct hci_dev *hdev, int type, void *data, int count);
+
 int hci_register_sysfs(struct hci_dev *hdev);
 void hci_unregister_sysfs(struct hci_dev *hdev);
 void hci_conn_add_sysfs(struct hci_conn *conn);