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SubjectRe: [PATCH] skge: resolve tx multiqueue bug
On Wed, Jul 23, 2008 at 03:30:00PM -0700, David Miller wrote:
> From: Wang Chen <wangchen@cn.fujitsu.com>
> Date: Wed, 23 Jul 2008 23:21:14 +0800
>
> > Markus Trippelsdorf said the following on 2008-7-23 22:03:
> > > On Wed, Jul 23, 2008 at 12:18:27PM +0200, Markus Trippelsdorf wrote:
> > >> On Wed, Jul 23, 2008 at 04:50:13PM +0800, Wang Chen wrote:
> > >>> Markus Trippelsdorf said the following on 2008-7-23 13:40:
> > >>>> On Tue, Jul 22, 2008 at 11:54:26AM +0200, Alessandro Guido wrote:
> > >>>>> Got a WARNING this morning (2.6.26-05752-g93ded9b) and I think it's related.
> > >>>> Same thing here (latest git):
> > >>>>
> > >>>> skge eth1: enabling interface
> > >>>> skge eth1: disabling interface
> > >>>> ------------[ cut here ]------------
> > >>>> WARNING: at net/core/dev.c:1344 __netif_schedule+0x24/0x6d()
> > >>>> Pid: 1904, comm: ip Not tainted 2.6.26-06077-gc010b2f #33
> > >>>> [<ffffffff8020b3eb>] system_call_after_swapgs+0x7b/0x80
> > >> ...
> > >>>> ---[ end trace 92936ef183e09876 ]---
> > >>>> skge eth1: enabling interface
> > >>>> skge eth1: Link is up at 100 Mbps, full duplex, flow control both
> > >>>>
> > >>> Markus, please try this.
> > >>>
> > >>> - Add netif_start_queue() in ->open()
> > >>> - netif_carrier_*() is enough, remove netif_*_queue()
> > >> Unfortunately, your patch does not fix this. I still get the same warning.
> > >>
> > >
> > > This patch works for me:
> >
> > Your patch works for me too. So I think it's better than mine. :)
> >
> > Tested-by: Wang Chen <wangchen@cn.fujitsu.com>
> >
> > Dave, since Markus and me tested this patch, would you please apply it?
>
> I can't, it's whitespace damaged. All the tabs are turned into spaces,
> also there is no signoff from Markus.

Sorry, here is a correct version:

- Add netif_start_queue() in ->open()
- netif_carrier_*() is enough, remove netif_*_queue()

Signed-off-by: Markus Trippelsdorf <markus@trippelsdorf.de>
Tested-by: Wang Chen <wangchen@cn.fujitsu.com>
--
Markus
diff --git a/drivers/net/skge.c b/drivers/net/skge.c
index 2e26dce..d761296 100644
--- a/drivers/net/skge.c
+++ b/drivers/net/skge.c
@@ -1069,7 +1069,6 @@ static void skge_link_up(struct skge_port *skge)
LED_BLK_OFF|LED_SYNC_OFF|LED_ON);

netif_carrier_on(skge->netdev);
- netif_wake_queue(skge->netdev);

if (netif_msg_link(skge)) {
printk(KERN_INFO PFX
@@ -1084,7 +1083,6 @@ static void skge_link_down(struct skge_port *skge)
{
skge_write8(skge->hw, SK_REG(skge->port, LNK_LED_REG), LED_OFF);
netif_carrier_off(skge->netdev);
- netif_stop_queue(skge->netdev);

if (netif_msg_link(skge))
printk(KERN_INFO PFX "%s: Link is down.\n", skge->netdev->name);
@@ -2450,7 +2448,6 @@ static void skge_phy_reset(struct skge_port *skge)
int port = skge->port;
struct net_device *dev = hw->dev[port];

- netif_stop_queue(skge->netdev);
netif_carrier_off(skge->netdev);

spin_lock_bh(&hw->phy_lock);
@@ -2640,6 +2637,7 @@ static int skge_up(struct net_device *dev)
spin_unlock_irq(&hw->hw_lock);

napi_enable(&skge->napi);
+ netif_start_queue(dev);
return 0;

free_rx_ring:
@@ -2673,8 +2671,6 @@ static int skge_down(struct net_device *dev)
if (netif_msg_ifdown(skge))
printk(KERN_INFO PFX "%s: disabling interface\n", dev->name);

- netif_stop_queue(dev);
-
if (hw->chip_id == CHIP_ID_GENESIS && hw->phy_type == SK_PHY_XMAC)
del_timer_sync(&skge->link_timer);

@@ -3863,7 +3859,6 @@ static struct net_device *skge_devinit(struct skge_hw *hw, int port,

/* device is off until link detection */
netif_carrier_off(dev);
- netif_stop_queue(dev);

return dev;
}
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