Bluetooth: Remove unneeded recv_event variable

Now that the synchronous HCI requests use the new API and a new private
variable the recv_evt member of hci_dev is no-longer needed. This patch
removes it.
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

include/net/bluetooth/hci_core.h

@@ -326,7 +326,6 @@ struct hci_dev {
 	struct sk_buff_head	raw_q;
 	struct sk_buff_head	cmd_q;
 
-	struct sk_buff		*recv_evt;
 	struct sk_buff		*sent_cmd;
 	struct sk_buff		*reassembly[NUM_REASSEMBLY];
 

net/bluetooth/hci_core.c

@@ -1690,9 +1690,6 @@ static int hci_dev_do_close(struct hci_dev *hdev)
 		hdev->sent_cmd = NULL;
 	}
 
-	kfree_skb(hdev->recv_evt);
-	hdev->recv_evt = NULL;
-
 	/* After this point our queues are empty
 	 * and no tasks are scheduled. */
 	hdev->close(hdev);

net/bluetooth/hci_event.c

@@ -5052,18 +5052,6 @@ void hci_event_packet(struct hci_dev *hdev, struct sk_buff *skb)
 	u8 status = 0, event = hdr->evt;
 	u16 opcode = HCI_OP_NOP;
 
-	hci_dev_lock(hdev);
-
-	/* Received events are (currently) only needed when a request is
-	 * ongoing so avoid unnecessary memory allocation.
-	 */
-	if (hci_req_pending(hdev)) {
-		kfree_skb(hdev->recv_evt);
-		hdev->recv_evt = skb_clone(skb, GFP_KERNEL);
-	}
-
-	hci_dev_unlock(hdev);
-
 	if (hdev->sent_cmd && bt_cb(hdev->sent_cmd)->req.event == event) {
 		struct hci_command_hdr *cmd_hdr = (void *) hdev->sent_cmd->data;
 		opcode = __le16_to_cpu(cmd_hdr->opcode);