> On Tue, Jun 09, 2020 at 12:02:39AM +0200, Lorenzo Bianconi wrote: > > Disable frames injection in mvneta_xdp_xmit routine during hw > > re-configuration in order to avoid hardware hangs > > Hi Lorenzo > > Why does mvneta_tx() also not need the same protection? > > Andrew
Hi Andrew, So far I have not been able to trigger the issue in the legacy tx path. I hit the problem adding the capability to attach an eBPF program to CPUMAP entries [1]. In particular I am redirecting traffic to mvneta and concurrently attaching/removing a XDP program to/from it. I am not sure this can occur running mvneta_tx(). Moreover it seems a common pattern for .ndo_xdp_xmit() in other drivers (e.g ixgbe, bnxt, mlx5) Regards, Lorenzo [1] https://patchwork.ozlabs.org/project/netdev/cover/cover.1590960613.git.lore...@kernel.org/
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