Commit 8f1ead2d authored Mar 26, 2009 by Herbert Xu Committed by David S. Miller Mar 26, 2009

GRO: Disable GRO on legacy netif_rx path



When I fixed the GRO crash in the legacy receive path I used
napi_complete to replace __napi_complete.  Unfortunately they're
not the same when NETPOLL is enabled, which may result in us
not calling __napi_complete at all.

What's more, we really do need to keep the __napi_complete call
within the IRQ-off section since in theory an IRQ can occur in
between and fill up the backlog to the maximum, causing us to
lock up.

Since we can't seem to find a fix that works properly right now,
this patch reverts all the GRO support from the netif_rx path.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>

parent be0ea696

net/core/dev.c

+3 −6

Original line number	Diff line number	Diff line
		@@ -2627,18 +2627,15 @@ static int process_backlog(struct napi_struct *napi, int quota)
		local_irq_disable();
		skb = __skb_dequeue(&queue->input_pkt_queue);
		if (!skb) {
		__napi_complete(napi);
		local_irq_enable();
		napi_complete(napi);
		goto out;
		break;
		}
		local_irq_enable();

		napi_gro_receive(napi, skb);
		netif_receive_skb(skb);
		} while (++work < quota && jiffies == start_time);

		napi_gro_flush(napi);

		out:
		return work;
		}