Revert "ax25: zero length frame filtering in AX25"
This reverts commit f99bcff7a290768e035f3d4726e103c6ebe858bf.
Like netrom, Alan Cox says that zero lengths have real meaning
and are useful in this protocol.
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ax25/af_ax25.c b/net/ax25/af_ax25.c
index 7da5ebb..fd9d06f 100644
--- a/net/ax25/af_ax25.c
+++ b/net/ax25/af_ax25.c
@@ -1435,11 +1435,6 @@
size_t size;
int lv, err, addr_len = msg->msg_namelen;
- /* AX.25 empty data frame has no meaning : don't send */
- if (len == 0) {
- return (0);
- }
-
if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT))
return -EINVAL;
@@ -1639,13 +1634,6 @@
skb_reset_transport_header(skb);
copied = skb->len;
- /* AX.25 empty data frame has no meaning : ignore it */
- if (copied == 0) {
- err = copied;
- skb_free_datagram(sk, skb);
- goto out;
- }
-
if (copied > size) {
copied = size;
msg->msg_flags |= MSG_TRUNC;