NFC: Keep connection less bound sockets alive when DEP link goes down

When DEP goes down, bound cl sockets can be kept alive as there is no
reason to kill a connection less server socket because the LLCP link
went down.

Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

1 files changed, 10 insertions, 0 deletions

diff --git a/net/nfc/llcp/llcp.c b/net/nfc/llcp/llcp.c
index ee01be17e21f..7f92a857b319 100644
--- a/net/nfc/llcp/llcp.c
+++ b/net/nfc/llcp/llcp.c
@@ -85,6 +85,16 @@ static void nfc_llcp_socket_release(struct nfc_llcp_local *local, bool listen)
                         }
                 }
 
+                /*
+                 * If we have a connection less socket bound, we keep it alive
+                 * if the device is still present.
+                 */
+                if (sk->sk_state == LLCP_BOUND && sk->sk_type == SOCK_DGRAM &&
+                    listen == true) {
+                        bh_unlock_sock(sk);
+                        continue;
+                }
+
                 sk->sk_state = LLCP_CLOSED;
 
                 bh_unlock_sock(sk);