NFC: Close listening LLCP sockets when the device is gone

When the MAC link goes down, we should only keep the bound sockets
alive. They will be closed by sock_release or when the underlying
NFC device is moving away.

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

diff --git a/net/nfc/llcp/llcp.c b/net/nfc/llcp/llcp.c
index 6812b1e..0c8d25e 100644 (file)
--- a/net/nfc/llcp/llcp.c
+++ b/net/nfc/llcp/llcp.c
@@ -45,7 +45,7 @@ void nfc_llcp_sock_unlink(struct llcp_sock_list *l, struct sock *sk)
        write_unlock(&l->lock);
 }
 
-static void nfc_llcp_socket_release(struct nfc_llcp_local *local)
+static void nfc_llcp_socket_release(struct nfc_llcp_local *local, bool listen)
 {
        struct sock *sk;
        struct hlist_node *node, *tmp;
@@ -78,6 +78,11 @@ static void nfc_llcp_socket_release(struct nfc_llcp_local *local)
 
                                sock_orphan(accept_sk);
                        }
+
+                       if (listen == true) {
+                               release_sock(sk);
+                               continue;
+                       }
                }
 
                sk->sk_state = LLCP_CLOSED;
@@ -106,7 +111,7 @@ static void local_release(struct kref *ref)
        local = container_of(ref, struct nfc_llcp_local, ref);
 
        list_del(&local->list);
-       nfc_llcp_socket_release(local);
+       nfc_llcp_socket_release(local, false);
        del_timer_sync(&local->link_timer);
        skb_queue_purge(&local->tx_queue);
        destroy_workqueue(local->tx_wq);
@@ -991,7 +996,7 @@ void nfc_llcp_mac_is_down(struct nfc_dev *dev)
        nfc_llcp_clear_sdp(local);
 
        /* Close and purge all existing sockets */
-       nfc_llcp_socket_release(local);
+       nfc_llcp_socket_release(local, true);
 }
 
 void nfc_llcp_mac_is_up(struct nfc_dev *dev, u32 target_idx,