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-rw-r--r--net/nfc/llcp/commands.c17
1 files changed, 17 insertions, 0 deletions
diff --git a/net/nfc/llcp/commands.c b/net/nfc/llcp/commands.c
index f0a39456f26..df24be48d4d 100644
--- a/net/nfc/llcp/commands.c
+++ b/net/nfc/llcp/commands.c
@@ -528,6 +528,23 @@ int nfc_llcp_send_i_frame(struct nfc_llcp_sock *sock,
if (local == NULL)
return -ENODEV;
+ /* Remote is ready but has not acknowledged our frames */
+ if((sock->remote_ready &&
+ skb_queue_len(&sock->tx_pending_queue) >= sock->rw &&
+ skb_queue_len(&sock->tx_queue) >= 2 * sock->rw)) {
+ pr_err("Pending queue is full %d frames\n",
+ skb_queue_len(&sock->tx_pending_queue));
+ return -ENOBUFS;
+ }
+
+ /* Remote is not ready and we've been queueing enough frames */
+ if ((!sock->remote_ready &&
+ skb_queue_len(&sock->tx_queue) >= 2 * sock->rw)) {
+ pr_err("Tx queue is full %d frames\n",
+ skb_queue_len(&sock->tx_queue));
+ return -ENOBUFS;
+ }
+
msg_data = kzalloc(len, GFP_KERNEL);
if (msg_data == NULL)
return -ENOMEM;