NFC: nci: Add function to get max packet size for conn

FDP driver needs to send the firmware as regular packets
(not fragmented). The driver should have a way to
get the max packet size for a given connection.

Signed-off-by: Robert Dolca <robert.dolca@intel.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

1 files changed, 12 insertions, 0 deletions

diff --git a/net/nfc/nci/data.c b/net/nfc/nci/data.c
index 83acd189c13a..dbd24254412a 100644
--- a/net/nfc/nci/data.c
+++ b/net/nfc/nci/data.c
@@ -90,6 +90,18 @@ static inline void nci_push_data_hdr(struct nci_dev *ndev,
         nci_pbf_set((__u8 *)hdr, pbf);
 }
 
+int nci_conn_max_data_pkt_payload_size(struct nci_dev *ndev, __u8 conn_id)
+{
+        struct nci_conn_info *conn_info;
+
+        conn_info = nci_get_conn_info_by_conn_id(ndev, conn_id);
+        if (!conn_info)
+                return -EPROTO;
+
+        return conn_info->max_pkt_payload_len;
+}
+EXPORT_SYMBOL(nci_conn_max_data_pkt_payload_size);
+
 static int nci_queue_tx_data_frags(struct nci_dev *ndev,
                                    __u8 conn_id,
                                    struct sk_buff *skb) {