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Revert "bpf: veth driver panics when xdp prog attached before veth_open"

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This reverts commit 5e5dc33d5dacb34b0165061bc5a10efd2fd3b66f.

This patch fixes the panic maked by 2e0de6366ac16. Now Paolo
and Toke suggest reverting the patch 2e0de6366ac16 and making
it stronger, so do this first.

Signed-off-by: Heng Qi <hengqi@linux.alibaba.com>
Reviewed-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Heng Qi 2022-11-22 11:50:14 +08:00 committed by Jakub Kicinski
parent 8263ee81f6
commit b535d681ad
1 changed files with 1 additions and 1 deletions
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2
drivers/net/veth.c
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@ -1125,7 +1125,7 @@ static int veth_enable_xdp(struct net_device *dev)
int err, i;
rq = &priv->rq[0];
napi_already_on = rcu_access_pointer(rq->napi);
napi_already_on = (dev->flags & IFF_UP) && rcu_access_pointer(rq->napi);
if (!xdp_rxq_info_is_reg(&priv->rq[0].xdp_rxq)) {
err = veth_enable_xdp_range(dev, 0, dev->real_num_rx_queues, napi_already_on);