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Message-ID: <5b6d4061bd12a9079e882742c750962816ee6567.camel@redhat.com> Date: Tue, 19 Jul 2022 11:22:26 +0200 From: Paolo Abeni <pabeni@...hat.com> To: Lorenzo Bianconi <lorenzo@...nel.org>, netdev@...r.kernel.org Cc: nbd@....name, john@...ozen.org, sean.wang@...iatek.com, Mark-MC.Lee@...iatek.com, davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org, matthias.bgg@...il.com, linux-mediatek@...ts.infradead.org, ilias.apalodimas@...aro.org, lorenzo.bianconi@...hat.com, jbrouer@...hat.com Subject: Re: [PATCH v3 net-next 2/5] net: ethernet: mtk_eth_soc: add basic XDP support On Sat, 2022-07-16 at 09:34 +0200, Lorenzo Bianconi wrote: > Introduce basic XDP support to mtk_eth_soc driver. > Supported XDP verdicts: > - XDP_PASS > - XDP_DROP > - XDP_REDIRECT > > Signed-off-by: Lorenzo Bianconi <lorenzo@...nel.org> > --- > drivers/net/ethernet/mediatek/mtk_eth_soc.c | 147 +++++++++++++++++--- > drivers/net/ethernet/mediatek/mtk_eth_soc.h | 2 + > 2 files changed, 131 insertions(+), 18 deletions(-) > > diff --git a/drivers/net/ethernet/mediatek/mtk_eth_soc.c b/drivers/net/ethernet/mediatek/mtk_eth_soc.c > index 9a92d602ebd5..bc3a7dcab207 100644 > --- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c > +++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c > @@ -1494,11 +1494,44 @@ static void mtk_rx_put_buff(struct mtk_rx_ring *ring, void *data, bool napi) > skb_free_frag(data); > } > > +static u32 mtk_xdp_run(struct mtk_eth *eth, struct mtk_rx_ring *ring, > + struct xdp_buff *xdp, struct net_device *dev) > +{ > + struct bpf_prog *prog = rcu_dereference(eth->prog); It looks like here you need to acquire the RCU read lock. lockdep should splat otherwise. /P
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