2009-01-16 00:48:48

by Divy Le ray

[permalink] [raw]
Subject: [PATCH 2.6.28] cxgb3 - Fix LRO misalignment

From: Divy Le Ray <[email protected]>

The lro manager's frag_align_pad setting was missing,
leading to misaligned access to the skb passed up
to the stack.

Signed-off-by: Divy Le Ray <[email protected]>
---

drivers/net/cxgb3/sge.c | 1 +
1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/drivers/net/cxgb3/sge.c b/drivers/net/cxgb3/sge.c
index 14f9fb3..379a132 100644
--- a/drivers/net/cxgb3/sge.c
+++ b/drivers/net/cxgb3/sge.c
@@ -2104,6 +2104,7 @@ static void init_lro_mgr(struct sge_qset *qs, struct net_lro_mgr *lro_mgr)
{
lro_mgr->dev = qs->netdev;
lro_mgr->features = LRO_F_NAPI;
+ lro_mgr->frag_align_pad = NET_IP_ALIGN;
lro_mgr->ip_summed = CHECKSUM_UNNECESSARY;
lro_mgr->ip_summed_aggr = CHECKSUM_UNNECESSARY;
lro_mgr->max_desc = T3_MAX_LRO_SES;


2009-01-16 01:57:25

by Rick Jones

[permalink] [raw]
Subject: Re: [PATCH 2.6.28] cxgb3 - Fix LRO misalignment

Divy Le Ray wrote:
> From: Divy Le Ray <[email protected]>
>
> The lro manager's frag_align_pad setting was missing,
> leading to misaligned access to the skb passed up
> to the stack.
>
> Signed-off-by: Divy Le Ray <[email protected]>

I have tried this in a tree I have, and where I was once seeing unaligned access
messages on an ia64 system with LRO enabled, now I see none.

Tested-by: Rick Jones <[email protected]>

rick jones

2009-01-16 19:06:27

by Divy Le ray

[permalink] [raw]
Subject: Re: [PATCH 2.6.28] cxgb3 - Fix LRO misalignment

Rick Jones wrote:
> Divy Le Ray wrote:
>
>> From: Divy Le Ray <[email protected]>
>>
>> The lro manager's frag_align_pad setting was missing,
>> leading to misaligned access to the skb passed up
>> to the stack.
>>
>> Signed-off-by: Divy Le Ray <[email protected]>
>>
>
> I have tried this in a tree I have, and where I was once seeing unaligned access
> messages on an ia64 system with LRO enabled, now I see none.
>
> Tested-by: Rick Jones <[email protected]>
>
> rick jones
>
>
Hi Dave,

The patch is intended for 2.6.29, not 2.6.28 as the subject mistakenly
states.

Cheers,
Divy

2009-01-19 06:02:00

by David Miller

[permalink] [raw]
Subject: Re: [PATCH 2.6.28] cxgb3 - Fix LRO misalignment

From: Divy Le Ray <[email protected]>
Date: Fri, 16 Jan 2009 11:05:50 -0800

> The patch is intended for 2.6.29, not 2.6.28 as the subject mistakenly states.

Understood, applied, thanks everyone.