提交 fbef168f 编写于 作者: L Loic Poulain 提交者: Marcel Holtmann

Bluetooth: Add hci_cmd_sync function

Send a HCI command and wait for command complete event.
This function serializes the requests by grabbing the req_lock.
Signed-off-by: NLoic Poulain <loic.poulain@intel.com>
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>
上级 a9137188
......@@ -1349,6 +1349,9 @@ void hci_send_sco(struct hci_conn *conn, struct sk_buff *skb);
void *hci_sent_cmd_data(struct hci_dev *hdev, __u16 opcode);
struct sk_buff *hci_cmd_sync(struct hci_dev *hdev, u16 opcode, u32 plen,
const void *param, u32 timeout);
/* ----- HCI Sockets ----- */
void hci_send_to_sock(struct hci_dev *hdev, struct sk_buff *skb);
void hci_send_to_channel(unsigned short channel, struct sk_buff *skb,
......
......@@ -3580,6 +3580,25 @@ void *hci_sent_cmd_data(struct hci_dev *hdev, __u16 opcode)
return hdev->sent_cmd->data + HCI_COMMAND_HDR_SIZE;
}
/* Send HCI command and wait for command commplete event */
struct sk_buff *hci_cmd_sync(struct hci_dev *hdev, u16 opcode, u32 plen,
const void *param, u32 timeout)
{
struct sk_buff *skb;
if (!test_bit(HCI_UP, &hdev->flags))
return ERR_PTR(-ENETDOWN);
bt_dev_dbg(hdev, "opcode 0x%4.4x plen %d", opcode, plen);
hci_req_lock(hdev);
skb = __hci_cmd_sync(hdev, opcode, plen, param, timeout);
hci_req_unlock(hdev);
return skb;
}
EXPORT_SYMBOL(hci_cmd_sync);
/* Send ACL data */
static void hci_add_acl_hdr(struct sk_buff *skb, __u16 handle, __u16 flags)
{
......
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