linux-kernel - [PATCH] atl1c: dont use highprio tx queue

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Message-ID: <1329374591.5646.23.camel@edumazet-laptop>
Date:	Thu, 16 Feb 2012 07:43:11 +0100
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Thomas Meyer <thomas@...3r.de>, David Miller <davem@...emloft.net>
Cc:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	"jcliburn@...il.com" <jcliburn@...il.com>,
	"chris.snook@...il.com" <chris.snook@...il.com>,
	netdev <netdev@...r.kernel.org>, Josh Boyer <jwboyer@...il.com>
Subject: [PATCH] atl1c: dont use highprio tx queue

This driver attempts to use two TX rings but lacks proper support :

1) IRQ handler only takes care of TX completion on first TX ring
2) the stop/start logic uses the legacy functions (for non multiqueue
drivers)

This means all packets witk skb mark set to 1 are sent through high
queue but are never cleaned and queue eventualy fills and block the
device, triggering the infamous "NETDEV WATCHDOG" message. 

Lets use a single TX ring to fix the problem, this driver is not a real
multiqueue one yet.

Minimal fix for stable kernels.

Reported-by: Thomas Meyer <thomas@...3r.de>
Tested-by: Thomas Meyer <thomas@...3r.de>
Signed-off-by: Eric Dumazet <eric.dumazet@...il.com>
Cc: Jay Cliburn <jcliburn@...il.com>
Cc: Chris Snook <chris.snook@...il.com>
---
 drivers/net/ethernet/atheros/atl1c/atl1c_main.c |    4 ----
 1 file changed, 4 deletions(-)

diff --git a/drivers/net/ethernet/atheros/atl1c/atl1c_main.c b/drivers/net/ethernet/atheros/atl1c/atl1c_main.c
index b859124..1ff3c6d 100644
--- a/drivers/net/ethernet/atheros/atl1c/atl1c_main.c
+++ b/drivers/net/ethernet/atheros/atl1c/atl1c_main.c
@@ -2244,10 +2244,6 @@ static netdev_tx_t atl1c_xmit_frame(struct sk_buff *skb,
 			dev_info(&adapter->pdev->dev, "tx locked\n");
 		return NETDEV_TX_LOCKED;
 	}
-	if (skb->mark == 0x01)
-		type = atl1c_trans_high;
-	else
-		type = atl1c_trans_normal;
 
 	if (atl1c_tpd_avail(adapter, type) < tpd_req) {
 		/* no enough descriptor, just stop queue */


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