diff --git a/drivers/bluetooth/hci_ath.c b/drivers/bluetooth/hci_ath.c
index 9c4dcf4c62ea763e318ecc41f7ef5db03a9fbe67..4e89d3e33b7bafc80540cc35096f4deb85b4bf22 100644
--- a/drivers/bluetooth/hci_ath.c
+++ b/drivers/bluetooth/hci_ath.c
@@ -188,7 +188,7 @@ static struct sk_buff *ath_dequeue(struct hci_uart *hu)
 }
 
 /* Recv data */
-static int ath_recv(struct hci_uart *hu, void *data, int count)
+static int ath_recv(struct hci_uart *hu, const void *data, int count)
 {
 	int ret;
 
diff --git a/drivers/bluetooth/hci_bcsp.c b/drivers/bluetooth/hci_bcsp.c
index 21cc45b34f134fe8028606e2595d381a125e0926..50ef2e613d598f3bb77a18e2a389d5f4aaeb4436 100644
--- a/drivers/bluetooth/hci_bcsp.c
+++ b/drivers/bluetooth/hci_bcsp.c
@@ -554,10 +554,10 @@ static u16 bscp_get_crc(struct bcsp_struct *bcsp)
 }
 
 /* Recv data */
-static int bcsp_recv(struct hci_uart *hu, void *data, int count)
+static int bcsp_recv(struct hci_uart *hu, const void *data, int count)
 {
 	struct bcsp_struct *bcsp = hu->priv;
-	unsigned char *ptr;
+	const unsigned char *ptr;
 
 	BT_DBG("hu %p count %d rx_state %d rx_count %ld", 
 		hu, count, bcsp->rx_state, bcsp->rx_count);
diff --git a/drivers/bluetooth/hci_h4.c b/drivers/bluetooth/hci_h4.c
index 0d9ba07d273099aaa4110c7f8d69e76b7cdce2cc..97a5df4941b4fa8fbabfcbadfdc3ee4fb93b7e74 100644
--- a/drivers/bluetooth/hci_h4.c
+++ b/drivers/bluetooth/hci_h4.c
@@ -113,7 +113,7 @@ static int h4_enqueue(struct hci_uart *hu, struct sk_buff *skb)
 }
 
 /* Recv data */
-static int h4_recv(struct hci_uart *hu, void *data, int count)
+static int h4_recv(struct hci_uart *hu, const void *data, int count)
 {
 	int ret;
 
diff --git a/drivers/bluetooth/hci_h5.c b/drivers/bluetooth/hci_h5.c
index ec0fa7732c0d953c359c86f16a5f307a00f3d930..0f681cc1af6445eca6042a5d3ebd09bc39cc64d8 100644
--- a/drivers/bluetooth/hci_h5.c
+++ b/drivers/bluetooth/hci_h5.c
@@ -511,10 +511,10 @@ static void h5_reset_rx(struct h5 *h5)
 	clear_bit(H5_RX_ESC, &h5->flags);
 }
 
-static int h5_recv(struct hci_uart *hu, void *data, int count)
+static int h5_recv(struct hci_uart *hu, const void *data, int count)
 {
 	struct h5 *h5 = hu->priv;
-	unsigned char *ptr = data;
+	const unsigned char *ptr = data;
 
 	BT_DBG("%s pending %zu count %d", hu->hdev->name, h5->rx_pending,
 	       count);
diff --git a/drivers/bluetooth/hci_ldisc.c b/drivers/bluetooth/hci_ldisc.c
index a3b906bcfca68bb3a20977a8afc5f39ae659945a..50dbaf3579ed638a1ea99258bc2aee7c76486584 100644
--- a/drivers/bluetooth/hci_ldisc.c
+++ b/drivers/bluetooth/hci_ldisc.c
@@ -441,7 +441,7 @@ static void hci_uart_tty_receive(struct tty_struct *tty, const u8 *data,
 		return;
 
 	spin_lock(&hu->rx_lock);
-	hu->proto->recv(hu, (void *) data, count);
+	hu->proto->recv(hu, data, count);
 
 	if (hu->hdev)
 		hu->hdev->stat.byte_rx += count;
diff --git a/drivers/bluetooth/hci_ll.c b/drivers/bluetooth/hci_ll.c
index 69a90b1b5ff56131aa7a2e51b7d18aabba28b560..79eea1cbd9885c07aad3c9069579bbcdf002d61b 100644
--- a/drivers/bluetooth/hci_ll.c
+++ b/drivers/bluetooth/hci_ll.c
@@ -370,10 +370,10 @@ static inline int ll_check_data_len(struct hci_dev *hdev, struct ll_struct *ll,
 }
 
 /* Recv data */
-static int ll_recv(struct hci_uart *hu, void *data, int count)
+static int ll_recv(struct hci_uart *hu, const void *data, int count)
 {
 	struct ll_struct *ll = hu->priv;
-	char *ptr;
+	const char *ptr;
 	struct hci_event_hdr *eh;
 	struct hci_acl_hdr   *ah;
 	struct hci_sco_hdr   *sh;
diff --git a/drivers/bluetooth/hci_uart.h b/drivers/bluetooth/hci_uart.h
index 4dc8ab3009a961fc6ba269431c630e7e4b6fc3d1..79bbcefb01127df94ab7c780fcfb0077444f4842 100644
--- a/drivers/bluetooth/hci_uart.h
+++ b/drivers/bluetooth/hci_uart.h
@@ -60,7 +60,7 @@ struct hci_uart_proto {
 	int (*open)(struct hci_uart *hu);
 	int (*close)(struct hci_uart *hu);
 	int (*flush)(struct hci_uart *hu);
-	int (*recv)(struct hci_uart *hu, void *data, int len);
+	int (*recv)(struct hci_uart *hu, const void *data, int len);
 	int (*enqueue)(struct hci_uart *hu, struct sk_buff *skb);
 	int (*setup)(struct hci_uart *hu);
 	struct sk_buff *(*dequeue)(struct hci_uart *hu);