linux-kernel - Re: Revert "gro: Fix legacy path napi

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Date:	Thu, 26 Mar 2009 17:07:44 +0800
From:	Herbert Xu <herbert@...dor.apana.org.au>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	David Miller <davem@...emloft.net>, r.schwebel@...gutronix.de,
	torvalds@...ux-foundation.org, blaschka@...ux.vnet.ibm.com,
	tglx@...utronix.de, a.p.zijlstra@...llo.nl,
	linux-kernel@...r.kernel.org, kernel@...gutronix.de
Subject: Re: Revert "gro: Fix legacy path napi_complete crash",

On Wed, Mar 25, 2009 at 11:01:49PM +0100, Ingo Molnar wrote:
> 
> Sure, can try that. Probably the best would be if you sent me a 
> combo patch with the precise patch you meant me to try (there were 
> several patches, i'm not sure which one is the 'previous' one) plus 
> the forcedeth debug enable change as well.

Sure, here's the patch to do both.

diff --git a/net/core/dev.c b/net/core/dev.c
index e3fe5c7..2a7f6b3 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -2588,9 +2588,10 @@ static int process_backlog(struct napi_struct *napi, int quota)
 		local_irq_disable();
 		skb = __skb_dequeue(&queue->input_pkt_queue);
 		if (!skb) {
+			list_del(&napi->poll_list);
+			clear_bit(NAPI_STATE_SCHED, &napi->state);
 			local_irq_enable();
-			napi_complete(napi);
-			goto out;
+			break;
 		}
 		local_irq_enable();
 
@@ -2599,7 +2600,6 @@ static int process_backlog(struct napi_struct *napi, int quota)
 
 	napi_gro_flush(napi);
 
-out:
 	return work;
 }

diff --git a/drivers/net/forcedeth.c b/drivers/net/forcedeth.c
index b8251e8..101e552 100644
--- a/drivers/net/forcedeth.c
+++ b/drivers/net/forcedeth.c
@@ -64,7 +64,7 @@
 #include <asm/uaccess.h>
 #include <asm/system.h>
 
-#if 0
+#if 1
 #define dprintk			printk
 #else
 #define dprintk(x...)		do { } while (0)

Thanks,
-- 
Visit Openswan at http://www.openswan.org/
Email: Herbert Xu ~{PmV>HI~} <herbert@...dor.apana.org.au>
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