[PATCH 5.4 249/255] Revert "net/ieee802154: reject zero-sized raw_sendmsg()"

[Greg Kroah-Hartman]

From: Alexander Aring <aahringo@xxxxxxxxxx>

[ Upstream commit 2eb2756f6c9e9621e022d78321ce40a62c4520b5 ]

This reverts commit 3a4d061c699bd3eedc80dc97a4b2a2e1af83c6f5.

There is a v2 which does return zero if zero length is given.

Signed-off-by: Alexander Aring <aahringo@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20221005014750.3685555-1-aahringo@xxxxxxxxxx
Signed-off-by: Stefan Schmidt <stefan@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 net/ieee802154/socket.c | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/net/ieee802154/socket.c b/net/ieee802154/socket.c
index 72637d5994d8..a92b11999e5f 100644
--- a/net/ieee802154/socket.c
+++ b/net/ieee802154/socket.c
@@ -252,9 +252,6 @@ static int raw_sendmsg(struct sock *sk, struct msghdr *msg, size_t size)
 		return -EOPNOTSUPP;
 	}
 
-	if (!size)
-		return -EINVAL;
-
 	lock_sock(sk);
 	if (!sk->sk_bound_dev_if)
 		dev = dev_getfirstbyhwtype(sock_net(sk), ARPHRD_IEEE802154);
-- 
2.35.1