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bpf: netdev is never null in __dev_map_flush

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No need to test for it in fast-path, every dev in bpf_dtab_netdev
is guaranteed to be non-NULL, otherwise dev_map_update_elem() will
fail in the first place.

Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: John Fastabend <john.fastabend@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Daniel Borkmann 2017-08-24 03:20:11 +02:00 committed by David S. Miller
parent d2aaa3dc41
commit a5e2da6e97
1 changed files with 3 additions and 5 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

8
kernel/bpf/devmap.c
View file

@ -226,12 +226,10 @@ void __dev_map_flush(struct bpf_map *map)
if (unlikely(!dev))
continue;
netdev = dev->dev;
__clear_bit(bit, bitmap);
if (unlikely(!netdev || !netdev->netdev_ops->ndo_xdp_flush))
continue;
netdev->netdev_ops->ndo_xdp_flush(netdev);
netdev = dev->dev;
if (likely(netdev->netdev_ops->ndo_xdp_flush))
netdev->netdev_ops->ndo_xdp_flush(netdev);
}
}