From aa2cad0600ed2ca6a0ab39948d4db1666b6c962b Mon Sep 17 00:00:00 2001 From: Li RongQing Date: Thu, 11 Jun 2020 13:11:06 +0800 Subject: [PATCH] xdp: Fix xsk_generic_xmit errno MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Propagate sock_alloc_send_skb error code, not set it to EAGAIN unconditionally, when fail to allocate skb, which might cause that user space unnecessary loops. Fixes: 35fcde7f8deb ("xsk: support for Tx") Signed-off-by: Li RongQing Signed-off-by: Daniel Borkmann Acked-by: Björn Töpel Link: https://lore.kernel.org/bpf/1591852266-24017-1-git-send-email-lirongqing@baidu.com --- net/xdp/xsk.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) diff --git a/net/xdp/xsk.c b/net/xdp/xsk.c index b6c0f08bd80d..3700266229f6 100644 --- a/net/xdp/xsk.c +++ b/net/xdp/xsk.c @@ -352,10 +352,8 @@ static int xsk_generic_xmit(struct sock *sk) len = desc.len; skb = sock_alloc_send_skb(sk, len, 1, &err); - if (unlikely(!skb)) { - err = -EAGAIN; + if (unlikely(!skb)) goto out; - } skb_put(skb, len); addr = desc.addr;