[PATCH 2/2] Bluetooth: Add __hci_cmd_sync_ev function

[Johan Hedberg <johan.hedberg@gmail.com>]

From: Johan Hedberg <johan.hedberg@intel.com>

This patch adds a __hci_cmd_sync_ev function, analogous to
__hci_cmd_sync except that it also takes an event parameter to indicate
that the command completes with a special event instead of command
complete. Internally this new function takes advantage of the
hci_req_add_ev function introduced in the previous patch.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
---
 include/net/bluetooth/hci_core.h |    2 ++
 net/bluetooth/hci_core.c         |   22 +++++++++++++++++-----
 2 files changed, 19 insertions(+), 5 deletions(-)

diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h
index 8ee1381..be695e6 100644
--- a/include/net/bluetooth/hci_core.h
+++ b/include/net/bluetooth/hci_core.h
@@ -1061,6 +1061,8 @@ void hci_req_cmd_complete(struct hci_dev *hdev, u16 opcode, u8 status);
 
 struct sk_buff *__hci_cmd_sync(struct hci_dev *hdev, u16 opcode, u32 plen,
 			       void *param, u32 timeout);
+struct sk_buff *__hci_cmd_sync_ev(struct hci_dev *hdev, u16 opcode, u32 plen,
+				  void *param, u8 event, u32 timeout);
 
 int hci_send_cmd(struct hci_dev *hdev, __u16 opcode, __u32 plen, void *param);
 void hci_send_acl(struct hci_chan *chan, struct sk_buff *skb, __u16 flags);
diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c
index 6f71e4c..d181992 100644
--- a/net/bluetooth/hci_core.c
+++ b/net/bluetooth/hci_core.c
@@ -79,7 +79,7 @@ static void hci_req_cancel(struct hci_dev *hdev, int err)
 	}
 }
 
-struct sk_buff *hci_get_cmd_complete(struct hci_dev *hdev, u16 opcode)
+struct sk_buff *hci_get_cmd_complete(struct hci_dev *hdev, u16 opcode, u8 event)
 {
 	struct hci_ev_cmd_complete *ev;
 	struct hci_event_hdr *hdr;
@@ -100,6 +100,12 @@ struct sk_buff *hci_get_cmd_complete(struct hci_dev *hdev, u16 opcode)
 	hdr = (void *) skb->data;
 	skb_pull(skb, HCI_EVENT_HDR_SIZE);
 
+	if (event) {
+		if (hdr->evt != event)
+			goto failed;
+		return skb;
+	}
+
 	if (hdr->evt != HCI_EV_CMD_COMPLETE) {
 		BT_DBG("Last event is not cmd complete (0x%2.2x)", hdr->evt);
 		goto failed;
@@ -119,8 +125,8 @@ failed:
 	return ERR_PTR(-ENODATA);
 }
 
-struct sk_buff *__hci_cmd_sync(struct hci_dev *hdev, u16 opcode, u32 plen,
-			       void *param, u32 timeout)
+struct sk_buff *__hci_cmd_sync_ev(struct hci_dev *hdev, u16 opcode, u32 plen,
+				  void *param, u8 event, u32 timeout)
 {
 	DECLARE_WAITQUEUE(wait, current);
 	struct hci_request req;
@@ -130,7 +136,7 @@ struct sk_buff *__hci_cmd_sync(struct hci_dev *hdev, u16 opcode, u32 plen,
 
 	hci_req_init(&req, hdev);
 
-	hci_req_add(&req, opcode, plen, param);
+	hci_req_add_ev(&req, opcode, plen, param, event);
 
 	hdev->req_status = HCI_REQ_PEND;
 
@@ -169,7 +175,13 @@ struct sk_buff *__hci_cmd_sync(struct hci_dev *hdev, u16 opcode, u32 plen,
 	if (err < 0)
 		return ERR_PTR(err);
 
-	return hci_get_cmd_complete(hdev, opcode);
+	return hci_get_cmd_complete(hdev, opcode, event);
+}
+
+struct sk_buff *__hci_cmd_sync(struct hci_dev *hdev, u16 opcode, u32 plen,
+			       void *param, u32 timeout)
+{
+	return __hci_cmd_sync_ev(hdev, opcode, plen, param, 0, timeout);
 }
 
 /* Execute request and wait for completion. */
-- 
1.7.10.4