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net: veth: Disable netpoll support

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The current implementation of netpoll in veth devices leads to
suboptimal behavior, as it triggers warnings due to the invocation of
__netif_rx() within a softirq context. This is not compliant with
expected practices, as __netif_rx() has the following statement:

	lockdep_assert_once(hardirq_count() | softirq_count());

Given that veth devices typically do not benefit from the
functionalities provided by netpoll, Disable netpoll for veth
interfaces.

Signed-off-by: Breno Leitao <leitao@debian.org>
Link: https://patch.msgid.link/20240805094012.1843247-1-leitao@debian.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Breno Leitao 2024-08-05 02:40:11 -07:00 committed by Jakub Kicinski
parent edfa53dd61
commit 45160cebd6
1 changed files with 1 additions and 0 deletions
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drivers/net/veth.c
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@ -1696,6 +1696,7 @@ static void veth_setup(struct net_device *dev)
dev->priv_flags |= IFF_LIVE_ADDR_CHANGE;
dev->priv_flags |= IFF_NO_QUEUE;
dev->priv_flags |= IFF_PHONY_HEADROOM;
dev->priv_flags |= IFF_DISABLE_NETPOLL;
dev->netdev_ops = &veth_netdev_ops;
dev->xdp_metadata_ops = &veth_xdp_metadata_ops;