From: Li RongQing lirongqing@baidu.com
[ Upstream commit aa2cad0600ed2ca6a0ab39948d4db1666b6c962b ]
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 lirongqing@baidu.com Signed-off-by: Daniel Borkmann daniel@iogearbox.net Acked-by: Björn Töpel bjorn.topel@intel.com Link: https://lore.kernel.org/bpf/1591852266-24017-1-git-send-email-lirongqing@bai... Signed-off-by: Sasha Levin sashal@kernel.org Signed-off-by: Yang Yingliang yangyingliang@huawei.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 72caa4fb13f4..9ff2ab63e639 100644 --- a/net/xdp/xsk.c +++ b/net/xdp/xsk.c @@ -233,10 +233,8 @@ static int xsk_generic_xmit(struct sock *sk, struct msghdr *m,
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;