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gro: Fix legacy path napi_complete crash 

On the legacy netif_rx path, I incorrectly tried to optimise
the napi_complete call by using __napi_complete before we reenable
IRQs.  This simply doesn't work since we need to flush the held
GRO packets first.

This patch fixes it by doing the obvious thing of reenabling
IRQs first and then calling napi_complete.

Reported-by: Frank Blaschka <blaschka@linux.vnet.ibm.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Herbert Xu 2009-03-17 13:11:29 -07:00 committed by David S. Miller
parent ea8dbdd170
commit 303c6a0251
1 changed files with 3 additions and 2 deletions
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5
net/core/dev.c
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@ -2588,9 +2588,9 @@ 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();
break;
napi_complete(napi);
goto out;
}
local_irq_enable();
@ -2599,6 +2599,7 @@ static int process_backlog(struct napi_struct *napi, int quota)
napi_gro_flush(napi);
out:
return work;
}