linux-kernel - Re: tg3: transmit timed out, resetting

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Message-ID: <20120607225654.GA14247@mcarlson.broadcom.com>
Date:	Thu, 7 Jun 2012 15:56:54 -0700
From:	"Matt Carlson" <mcarlson@...adcom.com>
To:	"ethan zhao" <ethan.kernel@...il.com>
cc:	"Eric Dumazet" <eric.dumazet@...il.com>,
	"Matt Carlson" <mcarlson@...adcom.com>,
	"Christian Kujau" <lists@...dbynature.de>,
	LKML <linux-kernel@...r.kernel.org>,
	netdev <netdev@...r.kernel.org>
Subject: Re: tg3: transmit timed out, resetting

On Wed, Jun 06, 2012 at 12:52:32PM +0800, ethan zhao wrote:
> Eric,
>   That is ask for confirmation from Matt Carlson of Broadcom.
> 
> Ethan
> 
> On Wed, Jun 6, 2012 at 12:12 PM, Eric Dumazet <eric.dumazet@...il.com> wrote:
> > On Wed, 2012-06-06 at 10:29 +0800, ethan zhao wrote:
> >> So no way to fix it via firmware update or Linux driver ? :<
> >
> > Yes, but you need to cooperate, or else it might take more time than
> > necessary.
> >
> > Asking questions like that on lkml is not going to help very much.
> >
> > So, once again, we kindly ask you try a recent kernel and post
> > register dump and some additional information when transmit timeouts
> > happen.
> >
> > The 'latest kernel' is either linux-3.5.rc1, or one of David Miller
> > tree :
> >
> > http://git.kernel.org/?p=linux/kernel/git/davem/net-next.git;a=summary
> >
> > or
> >
> > http://git.kernel.org/?p=linux/kernel/git/davem/net.git;a=summary
> >
> > Thanks

Does the following patch fix your problem?


[PATCH] tg3: Apply short DMA frag workaround to 5906

5906 devices also need the short DMA fragment workaround.  This patch
makes the necessary change.

Signed-off-by: Matt Carlson <mcarlson@...adcom.com>
---
 drivers/net/ethernet/broadcom/tg3.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/drivers/net/ethernet/broadcom/tg3.c b/drivers/net/ethernet/broadcom/tg3.c
index d55df32..2db4d70 100644
--- a/drivers/net/ethernet/broadcom/tg3.c
+++ b/drivers/net/ethernet/broadcom/tg3.c
@@ -14275,7 +14275,8 @@ static int __devinit tg3_get_invariants(struct tg3 *tp)
 		}
 	}
 
-	if (tg3_flag(tp, 5755_PLUS))
+	if (tg3_flag(tp, 5755_PLUS) ||
+	    GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5906)
 		tg3_flag_set(tp, SHORT_DMA_BUG);
 
 	if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5719)
-- 
1.7.3.4


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