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ixgbe, xsk: Get rid of redundant 'fallthrough'

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Intel drivers translate actions returned from XDP programs to their own
return codes that have the following mapping:

XDP_REDIRECT -> IXGBE_XDP_{REDIR,CONSUMED}
XDP_TX -> IXGBE_XDP_{TX,CONSUMED}
XDP_DROP -> IXGBE_XDP_CONSUMED
XDP_ABORTED -> IXGBE_XDP_CONSUMED
XDP_PASS -> IXGBE_XDP_PASS

Commit c7dd09fd46 ("ixgbe, xsk: Terminate Rx side of NAPI when XSK Rx
queue gets full") introduced new translation

XDP_REDIRECT -> IXGBE_XDP_EXIT

which is set when XSK RQ gets full and to indicate that driver should
stop further Rx processing. This happens for unsuccessful
xdp_do_redirect() so it is valuable to call trace_xdp_exception() for
this case. In order to avoid IXGBE_XDP_EXIT -> IXGBE_XDP_CONSUMED
overwrite, XDP_DROP case was moved above which in turn made the
'fallthrough' that is in XDP_ABORTED useless as it became the last label
in the switch statement.

Simply drop this leftover.

Fixes: c7dd09fd46 ("ixgbe, xsk: Terminate Rx side of NAPI when XSK Rx queue gets full")
Signed-off-by: Maciej Fijalkowski <maciej.fijalkowski@intel.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20220421132126.471515-2-maciej.fijalkowski@intel.com
This commit is contained in:
Maciej Fijalkowski 2022-04-21 15:21:25 +02:00 committed by Daniel Borkmann
parent e9147b4422
commit e130e8d543
1 changed files with 0 additions and 1 deletions
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drivers/net/ethernet/intel/ixgbe/ixgbe_xsk.c
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@ -144,7 +144,6 @@ static int ixgbe_run_xdp_zc(struct ixgbe_adapter *adapter,
result = IXGBE_XDP_CONSUMED;
out_failure:
trace_xdp_exception(rx_ring->netdev, xdp_prog, act);
fallthrough; /* handle aborts by dropping packet */
}
return result;
}