Bluetooth: Create hci_do_inquiry()

This patch adds a function to hci_core to carry out inquiry.

All inquiry code from start_discovery() were replaced by a
hci_do_inquiry() call.
Signed-off-by: Andre Guedes <andre.guedes@openbossa.org>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>

include/net/bluetooth/hci_core.h

@@ -970,4 +970,6 @@ void hci_le_start_enc(struct hci_conn *conn, __le16 ediv, __u8 rand[8],
 void hci_le_ltk_reply(struct hci_conn *conn, u8 ltk[16]);
 void hci_le_ltk_neg_reply(struct hci_conn *conn);
 
+int hci_do_inquiry(struct hci_dev *hdev, u8 length);
+
 #endif /* __HCI_CORE_H */

net/bluetooth/hci_core.c

@@ -2560,3 +2560,21 @@ static void hci_cmd_task(unsigned long arg)
 		}
 	}
 }
+
+int hci_do_inquiry(struct hci_dev *hdev, u8 length)
+{
+	/* General inquiry access code (GIAC) */
+	u8 lap[3] = { 0x33, 0x8b, 0x9e };
+	struct hci_cp_inquiry cp;
+
+	BT_DBG("%s", hdev->name);
+
+	if (test_bit(HCI_INQUIRY, &hdev->flags))
+		return -EINPROGRESS;
+
+	memset(&cp, 0, sizeof(cp));
+	memcpy(&cp.lap, lap, sizeof(cp.lap));
+	cp.length  = length;
+
+	return hci_send_cmd(hdev, HCI_OP_INQUIRY, sizeof(cp), &cp);
+}

net/bluetooth/mgmt.c

@@ -32,6 +32,8 @@
 #define MGMT_VERSION	0
 #define MGMT_REVISION	1
 
+#define INQUIRY_LEN_BREDR 0x08 /* TGAP(100) */
+
 struct pending_cmd {
 	struct list_head list;
 	__u16 opcode;
@@ -1598,8 +1600,6 @@ static int remove_remote_oob_data(struct sock *sk, u16 index,
 
 static int start_discovery(struct sock *sk, u16 index)
 {
-	u8 lap[3] = { 0x33, 0x8b, 0x9e };
-	struct hci_cp_inquiry cp;
 	struct pending_cmd *cmd;
 	struct hci_dev *hdev;
 	int err;
@@ -1618,12 +1618,7 @@ static int start_discovery(struct sock *sk, u16 index)
 		goto failed;
 	}
 
-	memset(&cp, 0, sizeof(cp));
-	memcpy(&cp.lap, lap, 3);
-	cp.length  = 0x08;
-	cp.num_rsp = 0x00;
-
-	err = hci_send_cmd(hdev, HCI_OP_INQUIRY, sizeof(cp), &cp);
+	err = hci_do_inquiry(hdev, INQUIRY_LEN_BREDR);
 	if (err < 0)
 		mgmt_pending_remove(cmd);