diff --git a/drivers/bluetooth/bfusb.c b/drivers/bluetooth/bfusb.c
index 5a321b4076aa..430e230999fa 100644
--- a/drivers/bluetooth/bfusb.c
+++ b/drivers/bluetooth/bfusb.c
@@ -651,7 +651,7 @@ static int bfusb_probe(struct usb_interface *intf, const struct usb_device_id *i
 	release_firmware(firmware);
 
 	/* Initialize and register HCI device */
-	hdev = hci_alloc_dev();
+	hdev = hci_alloc_dev(0);
 	if (!hdev) {
 		BT_ERR("Can't allocate HCI device");
 		goto done;
diff --git a/drivers/bluetooth/bluecard_cs.c b/drivers/bluetooth/bluecard_cs.c
index 36eabf61717f..d62b878aff7e 100644
--- a/drivers/bluetooth/bluecard_cs.c
+++ b/drivers/bluetooth/bluecard_cs.c
@@ -694,7 +694,7 @@ static int bluecard_open(struct bluecard_info *info)
 	info->rx_skb = NULL;
 
 	/* Initialize HCI device */
-	hdev = hci_alloc_dev();
+	hdev = hci_alloc_dev(0);
 	if (!hdev) {
 		BT_ERR("Can't allocate HCI device");
 		return -ENOMEM;
diff --git a/drivers/bluetooth/bpa10x.c b/drivers/bluetooth/bpa10x.c
index 1fa58c059cbf..bd670352a336 100644
--- a/drivers/bluetooth/bpa10x.c
+++ b/drivers/bluetooth/bpa10x.c
@@ -380,7 +380,7 @@ static int bpa10x_probe(struct usb_interface *intf,
 	init_usb_anchor(&data->tx_anchor);
 	init_usb_anchor(&data->rx_anchor);
 
-	hdev = hci_alloc_dev();
+	hdev = hci_alloc_dev(0);
 	if (!hdev)
 		return -ENOMEM;
 
diff --git a/drivers/bluetooth/bt3c_cs.c b/drivers/bluetooth/bt3c_cs.c
index 54713833951a..cd135a736688 100644
--- a/drivers/bluetooth/bt3c_cs.c
+++ b/drivers/bluetooth/bt3c_cs.c
@@ -550,7 +550,7 @@ static int bt3c_open(struct bt3c_info *info)
 	info->rx_skb = NULL;
 
 	/* Initialize HCI device */
-	hdev = hci_alloc_dev();
+	hdev = hci_alloc_dev(0);
 	if (!hdev) {
 		BT_ERR("Can't allocate HCI device");
 		return -ENOMEM;
diff --git a/drivers/bluetooth/btmrvl_main.c b/drivers/bluetooth/btmrvl_main.c
index 8b9d78ce6bb2..0157fa4ce528 100644
--- a/drivers/bluetooth/btmrvl_main.c
+++ b/drivers/bluetooth/btmrvl_main.c
@@ -680,7 +680,7 @@ int btmrvl_register_hdev(struct btmrvl_private *priv)
 	struct btmrvl_sdio_card *card = priv->btmrvl_dev.card;
 	int ret;
 
-	hdev = hci_alloc_dev();
+	hdev = hci_alloc_dev(0);
 	if (!hdev) {
 		BT_ERR("Can not allocate HCI device");
 		goto err_hdev;
diff --git a/drivers/bluetooth/btmtksdio.c b/drivers/bluetooth/btmtksdio.c
index 9872ef18f9fe..b48aec25c09d 100644
--- a/drivers/bluetooth/btmtksdio.c
+++ b/drivers/bluetooth/btmtksdio.c
@@ -959,7 +959,7 @@ static int btmtksdio_probe(struct sdio_func *func,
 	skb_queue_head_init(&bdev->txq);
 
 	/* Initialize and register HCI device */
-	hdev = hci_alloc_dev();
+	hdev = hci_alloc_dev(0);
 	if (!hdev) {
 		dev_err(&func->dev, "Can't allocate HCI device\n");
 		return -ENOMEM;
diff --git a/drivers/bluetooth/btmtkuart.c b/drivers/bluetooth/btmtkuart.c
index e9d91d7c0db4..96ee364507c5 100644
--- a/drivers/bluetooth/btmtkuart.c
+++ b/drivers/bluetooth/btmtkuart.c
@@ -987,7 +987,7 @@ static int btmtkuart_probe(struct serdev_device *serdev)
 	skb_queue_head_init(&bdev->txq);
 
 	/* Initialize and register HCI device */
-	hdev = hci_alloc_dev();
+	hdev = hci_alloc_dev(0);
 	if (!hdev) {
 		dev_err(&serdev->dev, "Can't allocate HCI device\n");
 		return -ENOMEM;
diff --git a/drivers/bluetooth/btqcomsmd.c b/drivers/bluetooth/btqcomsmd.c
index 2acb719e596f..47aaffceb8c1 100644
--- a/drivers/bluetooth/btqcomsmd.c
+++ b/drivers/bluetooth/btqcomsmd.c
@@ -147,7 +147,7 @@ static int btqcomsmd_probe(struct platform_device *pdev)
 		goto destroy_acl_channel;
 	}
 
-	hdev = hci_alloc_dev();
+	hdev = hci_alloc_dev(0);
 	if (!hdev) {
 		ret = -ENOMEM;
 		goto destroy_cmd_channel;
diff --git a/drivers/bluetooth/btrsi.c b/drivers/bluetooth/btrsi.c
index 8646b6dd11e9..2f8d186e4807 100644
--- a/drivers/bluetooth/btrsi.c
+++ b/drivers/bluetooth/btrsi.c
@@ -121,7 +121,7 @@ static int rsi_hci_attach(void *priv, struct rsi_proto_ops *ops)
 	ops->set_bt_context(priv, h_adapter);
 	h_adapter->proto_ops = ops;
 
-	hdev = hci_alloc_dev();
+	hdev = hci_alloc_dev(0);
 	if (!hdev) {
 		BT_ERR("Failed to alloc HCI device");
 		goto err;
diff --git a/drivers/bluetooth/btsdio.c b/drivers/bluetooth/btsdio.c
index 199e8f7d426d..69d2a26ed5db 100644
--- a/drivers/bluetooth/btsdio.c
+++ b/drivers/bluetooth/btsdio.c
@@ -310,7 +310,7 @@ static int btsdio_probe(struct sdio_func *func,
 
 	skb_queue_head_init(&data->txq);
 
-	hdev = hci_alloc_dev();
+	hdev = hci_alloc_dev(0);
 	if (!hdev)
 		return -ENOMEM;
 
diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c
index 1876a960b3dc..baf0934657d8 100644
--- a/drivers/bluetooth/btusb.c
+++ b/drivers/bluetooth/btusb.c
@@ -4575,7 +4575,7 @@ static int btusb_probe(struct usb_interface *intf,
 		data->recv_bulk = btusb_recv_bulk;
 	}
 
-	hdev = hci_alloc_dev();
+	hdev = hci_alloc_dev(0);
 	if (!hdev)
 		return -ENOMEM;
 
diff --git a/drivers/bluetooth/dtl1_cs.c b/drivers/bluetooth/dtl1_cs.c
index 2adfe4fade76..f06c8151f0ea 100644
--- a/drivers/bluetooth/dtl1_cs.c
+++ b/drivers/bluetooth/dtl1_cs.c
@@ -449,7 +449,7 @@ static int dtl1_open(struct dtl1_info *info)
 	set_bit(XMIT_WAITING, &(info->tx_state));
 
 	/* Initialize HCI device */
-	hdev = hci_alloc_dev();
+	hdev = hci_alloc_dev(0);
 	if (!hdev) {
 		BT_ERR("Can't allocate HCI device");
 		return -ENOMEM;
diff --git a/drivers/bluetooth/hci_ldisc.c b/drivers/bluetooth/hci_ldisc.c
index 5ed2cfa7da1d..89eb9d7685ae 100644
--- a/drivers/bluetooth/hci_ldisc.c
+++ b/drivers/bluetooth/hci_ldisc.c
@@ -627,7 +627,7 @@ static int hci_uart_register_dev(struct hci_uart *hu)
 	BT_DBG("");
 
 	/* Initialize and register HCI device */
-	hdev = hci_alloc_dev();
+	hdev = hci_alloc_dev(0);
 	if (!hdev) {
 		BT_ERR("Can't allocate HCI device");
 		return -ENOMEM;
diff --git a/drivers/bluetooth/hci_serdev.c b/drivers/bluetooth/hci_serdev.c
index 3b00d82d36cf..327fa2ecc5e7 100644
--- a/drivers/bluetooth/hci_serdev.c
+++ b/drivers/bluetooth/hci_serdev.c
@@ -313,7 +313,7 @@ int hci_uart_register_device(struct hci_uart *hu,
 	set_bit(HCI_UART_PROTO_READY, &hu->flags);
 
 	/* Initialize and register HCI device */
-	hdev = hci_alloc_dev();
+	hdev = hci_alloc_dev(0);
 	if (!hdev) {
 		BT_ERR("Can't allocate HCI device");
 		err = -ENOMEM;
diff --git a/drivers/bluetooth/hci_vhci.c b/drivers/bluetooth/hci_vhci.c
index 8ab26dec5f6e..5486aa3945da 100644
--- a/drivers/bluetooth/hci_vhci.c
+++ b/drivers/bluetooth/hci_vhci.c
@@ -96,7 +96,7 @@ static int __vhci_create_device(struct vhci_data *data, __u8 opcode)
 	if (!skb)
 		return -ENOMEM;
 
-	hdev = hci_alloc_dev();
+	hdev = hci_alloc_dev(0);
 	if (!hdev) {
 		kfree_skb(skb);
 		return -ENOMEM;
diff --git a/drivers/bluetooth/virtio_bt.c b/drivers/bluetooth/virtio_bt.c
index 57908ce4fae8..28576ec4860e 100644
--- a/drivers/bluetooth/virtio_bt.c
+++ b/drivers/bluetooth/virtio_bt.c
@@ -283,7 +283,7 @@ static int virtbt_probe(struct virtio_device *vdev)
 	if (err)
 		return err;
 
-	hdev = hci_alloc_dev();
+	hdev = hci_alloc_dev(0);
 	if (!hdev) {
 		err = -ENOMEM;
 		goto failed;
diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h
index a53e94459ecd..5c689c5dc089 100644
--- a/include/net/bluetooth/hci_core.h
+++ b/include/net/bluetooth/hci_core.h
@@ -1223,10 +1223,15 @@ static inline void hci_set_drvdata(struct hci_dev *hdev, void *data)
 	dev_set_drvdata(&hdev->dev, data);
 }
 
+static inline void *hci_get_priv(struct hci_dev *hdev)
+{
+	return (char *)hdev + sizeof(*hdev);
+}
+
 struct hci_dev *hci_dev_get(int index);
 struct hci_dev *hci_get_route(bdaddr_t *dst, bdaddr_t *src, u8 src_type);
 
-struct hci_dev *hci_alloc_dev(void);
+struct hci_dev *hci_alloc_dev(int sizeof_priv);
 void hci_free_dev(struct hci_dev *hdev);
 int hci_register_dev(struct hci_dev *hdev);
 void hci_unregister_dev(struct hci_dev *hdev);
diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c
index 2560ed2f144d..66b72c7efa3d 100644
--- a/net/bluetooth/hci_core.c
+++ b/net/bluetooth/hci_core.c
@@ -3751,11 +3751,18 @@ static int hci_suspend_notifier(struct notifier_block *nb, unsigned long action,
 }
 
 /* Alloc HCI device */
-struct hci_dev *hci_alloc_dev(void)
+struct hci_dev *hci_alloc_dev(int sizeof_priv)
 {
 	struct hci_dev *hdev;
+	unsigned int alloc_size;
 
-	hdev = kzalloc(sizeof(*hdev), GFP_KERNEL);
+	alloc_size = sizeof(*hdev);
+	if (sizeof_priv) {
+		/* Fixme: May need ALIGN-ment? */
+		alloc_size += sizeof_priv;
+	}
+
+	hdev = kzalloc(alloc_size, GFP_KERNEL);
 	if (!hdev)
 		return NULL;
 
