NFC: nci: Add dynamic logical connections support

The current NCI core only support the RF static connection.
For other NFC features such as Secure Element communication, we
may need to create logical connections to the NFCEE (Execution
Environment.

In order to track each logical connection ID dynamically, we add a
linked list of connection info pointers to the nci_dev structure.

Signed-off-by: Christophe Ricard <christophe-h.ricard@st.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

1 files changed, 19 insertions, 1 deletions

diff --git a/net/nfc/nci/rsp.c b/net/nfc/nci/rsp.c
index 041de51..93b9149 100644
--- a/net/nfc/nci/rsp.c
+++ b/net/nfc/nci/rsp.c
@@ -140,13 +140,31 @@ static void nci_rf_disc_map_rsp_packet(struct nci_dev *ndev,
 
 static void nci_rf_disc_rsp_packet(struct nci_dev *ndev, struct sk_buff *skb)
 {
+	struct nci_conn_info    *conn_info;
 	__u8 status = skb->data[0];
 
 	pr_debug("status 0x%x\n", status);
 
-	if (status == NCI_STATUS_OK)
+	if (status == NCI_STATUS_OK) {
 		atomic_set(&ndev->state, NCI_DISCOVERY);
 
+		conn_info = nci_get_conn_info_by_conn_id(ndev,
+							 NCI_STATIC_RF_CONN_ID);
+		if (!conn_info) {
+			conn_info = devm_kzalloc(&ndev->nfc_dev->dev,
+						 sizeof(struct nci_conn_info),
+						 GFP_KERNEL);
+			if (!conn_info) {
+				status = NCI_STATUS_REJECTED;
+				goto exit;
+			}
+			conn_info->conn_id = NCI_STATIC_RF_CONN_ID;
+			INIT_LIST_HEAD(&conn_info->list);
+			list_add(&conn_info->list, &ndev->conn_info_list);
+		}
+	}
+
+exit:
 	nci_req_complete(ndev, status);
 }