diff --git a/drivers/bluetooth/btmtk.h b/drivers/bluetooth/btmtk.h
index 453ed5131a37..5df7c3296624 100644
--- a/drivers/bluetooth/btmtk.h
+++ b/drivers/bluetooth/btmtk.h
@@ -224,70 +224,73 @@ static inline int btmtk_set_bdaddr(struct hci_dev *hdev,
 	return -EOPNOTSUPP;
 }
 
-static int btmtk_setup_firmware_79xx(struct hci_dev *hdev, const char *fwname,
-				     wmt_cmd_sync_func_t wmt_cmd_sync)
+static inline int btmtk_setup_firmware_79xx(struct hci_dev *hdev,
+					    const char *fwname,
+					    wmt_cmd_sync_func_t wmt_cmd_sync)
 {
 	return -EOPNOTSUPP;
 }
 
-static int btmtk_setup_firmware(struct hci_dev *hdev, const char *fwname,
-				wmt_cmd_sync_func_t wmt_cmd_sync)
+static inline int btmtk_setup_firmware(struct hci_dev *hdev, const char *fwname,
+				       wmt_cmd_sync_func_t wmt_cmd_sync)
 {
 	return -EOPNOTSUPP;
 }
 
-static void btmtk_reset_sync(struct hci_dev *hdev)
+static inline void btmtk_reset_sync(struct hci_dev *hdev)
 {
 }
 
-static int btmtk_register_coredump(struct hci_dev *hdev, const char *name,
-				   u32 fw_version)
+static inline int btmtk_register_coredump(struct hci_dev *hdev,
+					  const char *name, u32 fw_version)
 {
 	return -EOPNOTSUPP;
 }
 
-static int btmtk_process_coredump(struct hci_dev *hdev, struct sk_buff *skb)
+static inline int btmtk_process_coredump(struct hci_dev *hdev,
+					 struct sk_buff *skb)
 {
 	return -EOPNOTSUPP;
 }
 
-static void btmtk_fw_get_filename(char *buf, size_t size, u32 dev_id,
-				  u32 fw_ver, u32 fw_flavor)
+static inline void btmtk_fw_get_filename(char *buf, size_t size, u32 dev_id,
+					 u32 fw_ver, u32 fw_flavor)
 {
 }
 
-static int btmtk_usb_subsys_reset(struct hci_dev *hdev, u32 dev_id)
+static inline int btmtk_usb_subsys_reset(struct hci_dev *hdev, u32 dev_id)
 {
 	return -EOPNOTSUPP;
 }
 
-static int btmtk_usb_recv_acl(struct hci_dev *hdev, struct sk_buff *skb)
+static inline int btmtk_usb_recv_acl(struct hci_dev *hdev, struct sk_buff *skb)
 {
 	return -EOPNOTSUPP;
 }
 
-static struct urb *alloc_mtk_intr_urb(struct hci_dev *hdev, struct sk_buff *skb,
-				      usb_complete_t tx_complete)
+static inline struct urb *alloc_mtk_intr_urb(struct hci_dev *hdev,
+					     struct sk_buff *skb,
+					     usb_complete_t tx_complete)
 {
 	return ERR_PTR(-EOPNOTSUPP);
 }
 
-static int btmtk_usb_resume(struct hci_dev *hdev)
+static inline int btmtk_usb_resume(struct hci_dev *hdev)
 {
 	return -EOPNOTSUPP;
 }
 
-static int btmtk_usb_suspend(struct hci_dev *hdev)
+static inline int btmtk_usb_suspend(struct hci_dev *hdev)
 {
 	return -EOPNOTSUPP;
 }
 
-static int btmtk_usb_setup(struct hci_dev *hdev)
+static inline int btmtk_usb_setup(struct hci_dev *hdev)
 {
 	return -EOPNOTSUPP;
 }
 
-static int btmtk_usb_shutdown(struct hci_dev *hdev)
+static inline int btmtk_usb_shutdown(struct hci_dev *hdev)
 {
 	return -EOPNOTSUPP;
 }