Commit f31652a5 authored by Samuel Ortiz's avatar Samuel Ortiz
Browse files

NFC: Purge LLCP socket Tx queues when being disconnected



The Tx queues are no longer valid when we receive a disconnection or when
the LLCP link goes down. In the later case we also purge the entire local
Tx queue.
Signed-off-by: default avatarSamuel Ortiz <sameo@linux.intel.com>
parent f1522188
......@@ -45,12 +45,38 @@ void nfc_llcp_sock_unlink(struct llcp_sock_list *l, struct sock *sk)
write_unlock(&l->lock);
}
static void nfc_llcp_socket_purge(struct nfc_llcp_sock *sock)
{
struct nfc_llcp_local *local = sock->local;
struct sk_buff *s, *tmp;
pr_debug("%p\n", &sock->sk);
skb_queue_purge(&sock->tx_queue);
skb_queue_purge(&sock->tx_pending_queue);
skb_queue_purge(&sock->tx_backlog_queue);
if (local == NULL)
return;
/* Search for local pending SKBs that are related to this socket */
skb_queue_walk_safe(&local->tx_queue, s, tmp) {
if (s->sk != &sock->sk)
continue;
skb_unlink(s, &local->tx_queue);
kfree_skb(s);
}
}
static void nfc_llcp_socket_release(struct nfc_llcp_local *local, bool listen)
{
struct sock *sk;
struct hlist_node *node, *tmp;
struct nfc_llcp_sock *llcp_sock;
skb_queue_purge(&local->tx_queue);
write_lock(&local->sockets.lock);
sk_for_each_safe(sk, node, tmp, &local->sockets.head) {
......@@ -58,6 +84,8 @@ static void nfc_llcp_socket_release(struct nfc_llcp_local *local, bool listen)
bh_lock_sock(sk);
nfc_llcp_socket_purge(llcp_sock);
if (sk->sk_state == LLCP_CONNECTED)
nfc_put_device(llcp_sock->dev);
......@@ -1002,6 +1030,9 @@ static void nfc_llcp_recv_disc(struct nfc_llcp_local *local,
sk = &llcp_sock->sk;
lock_sock(sk);
nfc_llcp_socket_purge(llcp_sock);
if (sk->sk_state == LLCP_CLOSED) {
release_sock(sk);
nfc_llcp_sock_put(llcp_sock);
......
Markdown is supported
0% or .
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment