[Bluetooth]: Move packet type into the SKB control buffer

This patch moves the usage of packet type into the SKB control
buffer. After this patch it is now possible to shrink the sk_buff
structure and redefine its pkt_type.

Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 11 insertions, 10 deletions

diff --git a/drivers/bluetooth/hci_usb.c b/drivers/bluetooth/hci_usb.c
index 65740346de3..67d96b5cbb9 100644
--- a/drivers/bluetooth/hci_usb.c
+++ b/drivers/bluetooth/hci_usb.c
@@ -443,7 +443,7 @@ static int __tx_submit(struct hci_usb *husb, struct _urb *_urb)
 
 static inline int hci_usb_send_ctrl(struct hci_usb *husb, struct sk_buff *skb)
 {
-	struct _urb *_urb = __get_completed(husb, skb->pkt_type);
+	struct _urb *_urb = __get_completed(husb, bt_cb(skb)->pkt_type);
 	struct usb_ctrlrequest *dr;
 	struct urb *urb;
 
@@ -451,7 +451,7 @@ static inline int hci_usb_send_ctrl(struct hci_usb *husb, struct sk_buff *skb)
 		_urb = _urb_alloc(0, GFP_ATOMIC);
 		if (!_urb)
 			return -ENOMEM;
-		_urb->type = skb->pkt_type;
+		_urb->type = bt_cb(skb)->pkt_type;
 
 		dr = kmalloc(sizeof(*dr), GFP_ATOMIC);
 		if (!dr) {
@@ -479,7 +479,7 @@ static inline int hci_usb_send_ctrl(struct hci_usb *husb, struct sk_buff *skb)
 
 static inline int hci_usb_send_bulk(struct hci_usb *husb, struct sk_buff *skb)
 {
-	struct _urb *_urb = __get_completed(husb, skb->pkt_type);
+	struct _urb *_urb = __get_completed(husb, bt_cb(skb)->pkt_type);
 	struct urb *urb;
 	int pipe;
 
@@ -487,7 +487,7 @@ static inline int hci_usb_send_bulk(struct hci_usb *husb, struct sk_buff *skb)
 		_urb = _urb_alloc(0, GFP_ATOMIC);
 		if (!_urb)
 			return -ENOMEM;
-		_urb->type = skb->pkt_type;
+		_urb->type = bt_cb(skb)->pkt_type;
 	}
 
 	urb  = &_urb->urb;
@@ -505,14 +505,14 @@ static inline int hci_usb_send_bulk(struct hci_usb *husb, struct sk_buff *skb)
 #ifdef CONFIG_BT_HCIUSB_SCO
 static inline int hci_usb_send_isoc(struct hci_usb *husb, struct sk_buff *skb)
 {
-	struct _urb *_urb = __get_completed(husb, skb->pkt_type);
+	struct _urb *_urb = __get_completed(husb, bt_cb(skb)->pkt_type);
 	struct urb *urb;
 
 	if (!_urb) {
 		_urb = _urb_alloc(HCI_MAX_ISOC_FRAMES, GFP_ATOMIC);
 		if (!_urb)
 			return -ENOMEM;
-		_urb->type = skb->pkt_type;
+		_urb->type = bt_cb(skb)->pkt_type;
 	}
 
 	BT_DBG("%s skb %p len %d", husb->hdev->name, skb, skb->len);
@@ -601,11 +601,11 @@ static int hci_usb_send_frame(struct sk_buff *skb)
 	if (!test_bit(HCI_RUNNING, &hdev->flags))
 		return -EBUSY;
 
-	BT_DBG("%s type %d len %d", hdev->name, skb->pkt_type, skb->len);
+	BT_DBG("%s type %d len %d", hdev->name, bt_cb(skb)->pkt_type, skb->len);
 
 	husb = (struct hci_usb *) hdev->driver_data;
 
-	switch (skb->pkt_type) {
+	switch (bt_cb(skb)->pkt_type) {
 	case HCI_COMMAND_PKT:
 		hdev->stat.cmd_tx++;
 		break;
@@ -627,7 +627,7 @@ static int hci_usb_send_frame(struct sk_buff *skb)
 
 	read_lock(&husb->completion_lock);
 
-	skb_queue_tail(__transmit_q(husb, skb->pkt_type), skb);
+	skb_queue_tail(__transmit_q(husb, bt_cb(skb)->pkt_type), skb);
 	hci_usb_tx_wakeup(husb);
 
 	read_unlock(&husb->completion_lock);
@@ -682,7 +682,7 @@ static inline int __recv_frame(struct hci_usb *husb, int type, void *data, int c
 				return -ENOMEM;
 			}
 			skb->dev = (void *) husb->hdev;
-			skb->pkt_type = type;
+			bt_cb(skb)->pkt_type = type;
 	
 			__reassembly(husb, type) = skb;
 
@@ -702,6 +702,7 @@ static inline int __recv_frame(struct hci_usb *husb, int type, void *data, int c
 		if (!scb->expect) {
 			/* Complete frame */
 			__reassembly(husb, type) = NULL;
+			bt_cb(skb)->pkt_type = type;
 			hci_recv_frame(skb);
 		}