1 files changed, 42 insertions, 0 deletions
diff --git a/include/net/bluetooth/hci_sync.h b/include/net/bluetooth/hci_sync.h
new file mode 100644
index 000000000000..fcfdeb3cbd7c
--- /dev/null
+++ b/include/net/bluetooth/hci_sync.h
@@ -0,0 +1,42 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * BlueZ - Bluetooth protocol stack for Linux
+ *
+ * Copyright (C) 2021 Intel Corporation
+ */
+
+typedef int (*hci_cmd_sync_work_func_t)(struct hci_dev *hdev, void *data);
+typedef void (*hci_cmd_sync_work_destroy_t)(struct hci_dev *hdev, void *data,
+					    int err);
+
+struct hci_cmd_sync_work_entry {
+	struct list_head list;
+	hci_cmd_sync_work_func_t func;
+	void *data;
+	hci_cmd_sync_work_destroy_t destroy;
+};
+
+/* Function with sync suffix shall not be called with hdev->lock held as they
+ * wait the command to complete and in the meantime an event could be received
+ * which could attempt to acquire hdev->lock causing a deadlock.
+ */
+struct sk_buff *__hci_cmd_sync(struct hci_dev *hdev, u16 opcode, u32 plen,
+			       const void *param, u32 timeout);
+struct sk_buff *hci_cmd_sync(struct hci_dev *hdev, u16 opcode, u32 plen,
+			     const void *param, u32 timeout);
+struct sk_buff *__hci_cmd_sync_ev(struct hci_dev *hdev, u16 opcode, u32 plen,
+				  const void *param, u8 event, u32 timeout);
+struct sk_buff *__hci_cmd_sync_sk(struct hci_dev *hdev, u16 opcode, u32 plen,
+				  const void *param, u8 event, u32 timeout,
+				  struct sock *sk);
+int __hci_cmd_sync_status(struct hci_dev *hdev, u16 opcode, u32 plen,
+			  const void *param, u32 timeout);
+int __hci_cmd_sync_status_sk(struct hci_dev *hdev, u16 opcode, u32 plen,
+			     const void *param, u8 event, u32 timeout,
+			     struct sock *sk);
+
+void hci_cmd_sync_init(struct hci_dev *hdev);
+void hci_cmd_sync_clear(struct hci_dev *hdev);
+
+int hci_cmd_sync_queue(struct hci_dev *hdev, hci_cmd_sync_work_func_t func,
+		       void *data, hci_cmd_sync_work_destroy_t destroy);