Bluetooth: Refactor HCI command skb creation

This patch moves out the skb creation from hci_send_cmd() into its own
prepare_cmd() function. This is essential so the same prepare_cmd()
function can be easily reused for skb creation for asynchronous HCI
requests.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Acked-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>

diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c
index 94b08aa..d2edcc4 100644 (file)
--- a/net/bluetooth/hci_core.c
+++ b/net/bluetooth/hci_core.c
@@ -2469,20 +2469,16 @@ int hci_req_run(struct hci_request *req, hci_req_complete_t complete)
        return 0;
 }
 
-/* Send HCI command */
-int hci_send_cmd(struct hci_dev *hdev, __u16 opcode, __u32 plen, void *param)
+static struct sk_buff *hci_prepare_cmd(struct hci_dev *hdev, u16 opcode,
+                                      u32 plen, void *param)
 {
        int len = HCI_COMMAND_HDR_SIZE + plen;
        struct hci_command_hdr *hdr;
        struct sk_buff *skb;
 
-       BT_DBG("%s opcode 0x%4.4x plen %d", hdev->name, opcode, plen);
-
        skb = bt_skb_alloc(len, GFP_ATOMIC);
-       if (!skb) {
-               BT_ERR("%s no memory for command", hdev->name);
-               return -ENOMEM;
-       }
+       if (!skb)
+               return NULL;
 
        hdr = (struct hci_command_hdr *) skb_put(skb, HCI_COMMAND_HDR_SIZE);
        hdr->opcode = cpu_to_le16(opcode);
@@ -2496,6 +2492,22 @@ int hci_send_cmd(struct hci_dev *hdev, __u16 opcode, __u32 plen, void *param)
        bt_cb(skb)->pkt_type = HCI_COMMAND_PKT;
        skb->dev = (void *) hdev;
 
+       return skb;
+}
+
+/* Send HCI command */
+int hci_send_cmd(struct hci_dev *hdev, __u16 opcode, __u32 plen, void *param)
+{
+       struct sk_buff *skb;
+
+       BT_DBG("%s opcode 0x%4.4x plen %d", hdev->name, opcode, plen);
+
+       skb = hci_prepare_cmd(hdev, opcode, plen, param);
+       if (!skb) {
+               BT_ERR("%s no memory for command", hdev->name);
+               return -ENOMEM;
+       }
+
        if (test_bit(HCI_INIT, &hdev->flags))
                hdev->init_last_cmd = opcode;