netdev - Re: [PATCH 0/1] mv643xx_eth: Disable TSO by default

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Tue, 4 Nov 2014 15:20:20 +0100
From:	Karl Beldan <karl.beldan@...il.com>
To:	Ezequiel Garcia <ezequiel.garcia@...e-electrons.com>
Cc:	netdev@...r.kernel.org, David Miller <davem@...emloft.net>,
	Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>,
	Gregory Clement <gregory.clement@...e-electrons.com>,
	Tawfik Bayouk <tawfik@...vell.com>,
	Lior Amsalem <alior@...vell.com>,
	Nadav Haklai <nadavh@...vell.com>
Subject: Re: [PATCH 0/1] mv643xx_eth: Disable TSO by default

On Sat, Nov 01, 2014 at 12:30:19PM -0300, Ezequiel Garcia wrote:
> Several users ([1], [2]) have been reporting data corruption with TSO on
> Kirkwood platforms (i.e. using the mv643xx_eth driver).
> 
> Until we manage to find what's causing this, this simple patch will make
> the TSO path disabled by default. This patch should be queued for stable,
> fixing the TSO feature introduced in v3.16.
> 
> The corruption itself is very easy to reproduce: checking md5sum on a mounted
> NFS directory gives a different result each time. Same tests using the mvneta
> driver (Armada 370/38x/XP SoC) pass with no issues.
> 
> Frankly, I'm a bit puzzled about this, and so any ideas or debugging hints
> are well received.
> 

Hi,

Can you try this :

@@ -1067,7 +1082,8 @@ static int txq_reclaim(struct tx_queue *txq, int budget, int force)
 		txq->tx_desc_count--;
 
 		skb = NULL;
-		if (cmd_sts & TX_LAST_DESC)
+		if ((cmd_sts & (TX_LAST_DESC | TX_ENABLE_INTERRUPT)) ==
+			       (TX_LAST_DESC | TX_ENABLE_INTERRUPT))
 			skb = __skb_dequeue(&txq->tx_skb);
 
 		if (cmd_sts & ERROR_SUMMARY) {

-- 
Karl
--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html