From: Sergei Shtylyov <sergei.shtyl...@cogentembedded.com>
Date: Tue, 02 Jun 2015 23:44:10 +0300
> + /* Received network control queue */
> + if (ris0 & RIS0_FRF1) {
> + ravb_write(ndev, ~RIS0_FRF1, RIS0);
> + /* Timestamp of network control packets that is based
> + * on IEEE802.1AS, is used time synchronization of PTP.
> + * It should not be handled by NAPI scheduling, because
> + * it needs to be received as soon as possible.
> + */
> + ravb_rx(ndev, NULL, RAVB_NC);
> + result = IRQ_HANDLED;
> + }
Nobody else makes this distinction, all packets should be processed
via your NAPI path.
When I see people conditionally invoking netif_rx()
vs. netif_receive_skb() in their packet receive routine, like
conditional locking, it's a big red flag.
Furthermore, you should pass the NAPI context into ravb_rx() and use
it so that you can invoke napi_gro_receive() on all of the packets and
therefore support GRO.
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