Bluetooth: Store scan response data in HCI device

The scan response data needs to be stored in HCI device and so
add a buffer for it and also ensure to clear it when resetting
the controller.

Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>

include/net/bluetooth/hci_core.h

@@ -283,6 +283,8 @@ struct hci_dev {
 	__s8			adv_tx_power;
 	__u8			adv_data[HCI_MAX_AD_LENGTH];
 	__u8			adv_data_len;
+	__u8			scan_rsp_data[HCI_MAX_AD_LENGTH];
+	__u8			scan_rsp_data_len;
 
 	int (*open)(struct hci_dev *hdev);
 	int (*close)(struct hci_dev *hdev);

net/bluetooth/hci_event.c

@@ -195,6 +195,9 @@ static void hci_cc_reset(struct hci_dev *hdev, struct sk_buff *skb)
 
 	memset(hdev->adv_data, 0, sizeof(hdev->adv_data));
 	hdev->adv_data_len = 0;
+
+	memset(hdev->scan_rsp_data, 0, sizeof(hdev->scan_rsp_data));
+	hdev->scan_rsp_data_len = 0;
 }
 
 static void hci_cc_write_local_name(struct hci_dev *hdev, struct sk_buff *skb)