From c44a4366649aca4f5b4a51ff71d4c9cde3b7c9da Mon Sep 17 00:00:00 2001 From: "David S. Miller" Date: Fri, 27 Mar 2009 17:23:42 -0700 Subject: [PATCH] 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 --- net/ax25/af_ax25.c | 12 ------------ 1 file changed, 12 deletions(-) diff --git a/net/ax25/af_ax25.c b/net/ax25/af_ax25.c index 7da5ebb84e97..fd9d06f291dc 100644 --- a/net/ax25/af_ax25.c +++ b/net/ax25/af_ax25.c @@ -1435,11 +1435,6 @@ static int ax25_sendmsg(struct kiocb *iocb, struct socket *sock, 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 @@ static int ax25_recvmsg(struct kiocb *iocb, struct socket *sock, 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; -- 2.20.1