NFC: llcp: Remove the tx backlog queue

Not only it was improperly use to queue backlogged RX skbuffs, but it was
also not processed at all.
If the socket receive queue is full we simply drop the incoming packets.

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

3 files changed, 2 insertions, 6 deletions

diff --git a/net/nfc/llcp/llcp.c b/net/nfc/llcp/llcp.c
index 6c5971437826..003c82fe8bd7 100644
--- a/net/nfc/llcp/llcp.c
+++ b/net/nfc/llcp/llcp.c
@@ -54,7 +54,6 @@ static void nfc_llcp_socket_purge(struct nfc_llcp_sock *sock)
 
         skb_queue_purge(&sock->tx_queue);
         skb_queue_purge(&sock->tx_pending_queue);
-        skb_queue_purge(&sock->tx_backlog_queue);
 
         if (local == NULL)
                 return;
@@ -785,7 +784,7 @@ static void nfc_llcp_recv_ui(struct nfc_llcp_local *local,
         skb_pull(skb, LLCP_HEADER_SIZE);
         if (sock_queue_rcv_skb(&llcp_sock->sk, skb)) {
                 pr_err("receive queue is full\n");
-                skb_queue_head(&llcp_sock->tx_backlog_queue, skb);
+                kfree_skb(skb);
         }
 
         nfc_llcp_sock_put(llcp_sock);
@@ -980,7 +979,7 @@ static void nfc_llcp_recv_hdlc(struct nfc_llcp_local *local,
                 skb_pull(skb, LLCP_HEADER_SIZE + LLCP_SEQUENCE_SIZE);
                 if (sock_queue_rcv_skb(&llcp_sock->sk, skb)) {
                         pr_err("receive queue is full\n");
-                        skb_queue_head(&llcp_sock->tx_backlog_queue, skb);
+                        kfree_skb(skb);
                 }
         }
 
diff --git a/net/nfc/llcp/llcp.h b/net/nfc/llcp/llcp.h
index 0d62366f8cc3..0eae5c509504 100644
--- a/net/nfc/llcp/llcp.h
+++ b/net/nfc/llcp/llcp.h
@@ -121,7 +121,6 @@ struct nfc_llcp_sock {
 
         struct sk_buff_head tx_queue;
         struct sk_buff_head tx_pending_queue;
-        struct sk_buff_head tx_backlog_queue;
 
         struct list_head accept_queue;
         struct sock *parent;
diff --git a/net/nfc/llcp/sock.c b/net/nfc/llcp/sock.c
index ba1900700958..12ec4879b4ba 100644
--- a/net/nfc/llcp/sock.c
+++ b/net/nfc/llcp/sock.c
@@ -808,7 +808,6 @@ struct sock *nfc_llcp_sock_alloc(struct socket *sock, int type, gfp_t gfp)
         llcp_sock->reserved_ssap = LLCP_SAP_MAX;
         skb_queue_head_init(&llcp_sock->tx_queue);
         skb_queue_head_init(&llcp_sock->tx_pending_queue);
-        skb_queue_head_init(&llcp_sock->tx_backlog_queue);
         INIT_LIST_HEAD(&llcp_sock->accept_queue);
 
         if (sock != NULL)
@@ -823,7 +822,6 @@ void nfc_llcp_sock_free(struct nfc_llcp_sock *sock)
 
         skb_queue_purge(&sock->tx_queue);
         skb_queue_purge(&sock->tx_pending_queue);
-        skb_queue_purge(&sock->tx_backlog_queue);
 
         list_del_init(&sock->accept_queue);