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| author |   Sowmini Varadhan <sowmini.varadhan@oracle.com> | 2014-11-06 14:51:08 -0500 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2014-11-06 15:16:30 -0500 |
| commit | 8c4ee3e70646d6bfdda55afe84016b914c7fdd0e (patch) | |
| tree | e943ec597065f6d33713272d4e5805f3de7c052f /net/core/utils.c | |
| parent | sunvnet: Fix indentation in maybe_tx_wakeup() (diff) | |
| download | linux-rng-8c4ee3e70646d6bfdda55afe84016b914c7fdd0e.tar.xz linux-rng-8c4ee3e70646d6bfdda55afe84016b914c7fdd0e.zip | |
sunvnet: Return from vnet_napi_event() if no packets to read
vnet_event_napi() may be called as part of the NAPI ->poll,
to resume reading descriptor rings. When no data is available,
descriptor ring state (e.g., rcv_nxt) needs to be reset
carefully to stay in lock-step with ldc_read(). In the interest
of simplicity, the best way to do this is to return from
vnet_event_napi() when there are no more packets to read.
The next trip through ldc_rx will correctly set up the dring state.
Signed-off-by: Sowmini Varadhan <sowmini.varadhan@oracle.com>
Tested-by: David Stevens <david.stevens@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/core/utils.c')
0 files changed, 0 insertions, 0 deletions