[net-next-2.6 PATCH 1/5] ixgbe: fix link down initial state

[net-next-2.6 PATCH 1/5] ixgbe: fix link down initial state

[Jeff Kirsher]

From: Jesse Brandeburg <jesse.brandeburg@intel.com>

As reported by Andrew Lutomirski <amluto@gmail.com>

All the intel wired ethernet drivers were calling netif_carrier_off
and netif_stop_queue (or variants) before calling register_netdevice

This is incorrect behavior as was pointed out by davem, and causes
ifconfig and friends to report a strange state before first link
after the driver was loaded, since without a netif_carrier_off, the stack
assumes carrier_on, but before register_netdev, netlink messages are not
sent out telling link state.

This apparently confused *some* versions of networkmanager.

Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Reported-by: Andrew Lutomirski <amluto@gmail.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
---

 drivers/net/ixgbe/ixgbe_main.c |    7 +++++--
 1 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ixgbe/ixgbe_main.c b/drivers/net/ixgbe/ixgbe_main.c
index 0d9a3ac..d5d9589 100644
--- a/drivers/net/ixgbe/ixgbe_main.c
+++ b/drivers/net/ixgbe/ixgbe_main.c
@@ -3459,6 +3459,8 @@ static int ixgbe_open(struct net_device *netdev)
 	if (test_bit(__IXGBE_TESTING, &adapter->state))
 		return -EBUSY;
 
+	netif_carrier_off(netdev);
+
 	/* allocate transmit descriptors */
 	err = ixgbe_setup_all_tx_resources(adapter);
 	if (err)
@@ -4772,13 +4774,14 @@ static int __devinit ixgbe_probe(struct pci_dev *pdev,
 	/* reset the hardware with the new settings */
 	hw->mac.ops.start_hw(hw);
 
-	netif_carrier_off(netdev);
-
 	strcpy(netdev->name, "eth%d");
 	err = register_netdev(netdev);
 	if (err)
 		goto err_register;
 
+	/* carrier off reporting is important to ethtool even BEFORE open */
+	netif_carrier_off(netdev);
+
 #ifdef CONFIG_IXGBE_DCA
 	if (dca_add_requester(&pdev->dev) == 0) {
 		adapter->flags |= IXGBE_FLAG_DCA_ENABLED;

[net-next-2.6 PATCH 2/5] ixgb: fix link down initial state

[Jeff Kirsher]

From: Jesse Brandeburg <jesse.brandeburg@intel.com>

As reported by Andrew Lutomirski <amluto@gmail.com>

All the intel wired ethernet drivers were calling netif_carrier_off
and netif_stop_queue (or variants) before calling register_netdevice

This is incorrect behavior as was pointed out by davem, and causes
ifconfig and friends to report a strange state before first link
after the driver was loaded, since without a netif_carrier_off, the stack
assumes carrier_on, but before register_netdev, netlink messages are not
sent out telling link state.

This apparently confused *some* versions of networkmanager.

in addition this driver appeared to need a netif_start_queue at
the end of open.

Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Reported-by: Andrew Lutomirski <amluto@gmail.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
---

 drivers/net/ixgb/ixgb_main.c |    8 +++++---
 1 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ixgb/ixgb_main.c b/drivers/net/ixgb/ixgb_main.c
index 4a0826b..ff741ca 100644
--- a/drivers/net/ixgb/ixgb_main.c
+++ b/drivers/net/ixgb/ixgb_main.c
@@ -471,10 +471,8 @@ ixgb_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 	if (err)
 		goto err_register;
 
-	/* we're going to reset, so assume we have no link for now */
-
+	/* carrier off reporting is important to ethtool even BEFORE open */
 	netif_carrier_off(netdev);
-	netif_stop_queue(netdev);
 
 	DPRINTK(PROBE, INFO, "Intel(R) PRO/10GbE Network Connection\n");
 	ixgb_check_options(adapter);
@@ -592,6 +590,8 @@ ixgb_open(struct net_device *netdev)
 	if (err)
 		goto err_setup_tx;
 
+	netif_carrier_off(netdev);
+
 	/* allocate receive descriptors */
 
 	err = ixgb_setup_rx_resources(adapter);
@@ -602,6 +602,8 @@ ixgb_open(struct net_device *netdev)
 	if (err)
 		goto err_up;
 
+	netif_start_queue(netdev);
+
 	return 0;
 
 err_up:

[net-next-2.6 PATCH 3/5] igb: fix link down inital state

[Jeff Kirsher]

From: Jesse Brandeburg <jesse.brandeburg@intel.com>

As reported by Andrew Lutomirski <amluto@gmail.com>

All the intel wired ethernet drivers were calling netif_carrier_off
and netif_stop_queue (or variants) before calling register_netdevice

This is incorrect behavior as was pointed out by davem, and causes
ifconfig and friends to report a strange state before first link
after the driver was loaded, since without a netif_carrier_off, the stack
assumes carrier_on, but before register_netdev, netlink messages are not
sent out telling link state.

This apparently confused *some* versions of networkmanager.

Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Reported-by: Andrew Lutomirski <amluto@gmail.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
---

 drivers/net/igb/igb_main.c |    9 +++++----
 1 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/drivers/net/igb/igb_main.c b/drivers/net/igb/igb_main.c
index 08c8014..ceaa585 100644
--- a/drivers/net/igb/igb_main.c
+++ b/drivers/net/igb/igb_main.c
@@ -1442,15 +1442,14 @@ static int __devinit igb_probe(struct pci_dev *pdev,
 	 * driver. */
 	igb_get_hw_control(adapter);
 
-	/* tell the stack to leave us alone until igb_open() is called */
-	netif_carrier_off(netdev);
-	netif_tx_stop_all_queues(netdev);
-
 	strcpy(netdev->name, "eth%d");
 	err = register_netdev(netdev);
 	if (err)
 		goto err_register;
 
+	/* carrier off reporting is important to ethtool even BEFORE open */
+	netif_carrier_off(netdev);
+
 #ifdef CONFIG_IGB_DCA
 	if (dca_add_requester(&pdev->dev) == 0) {
 		adapter->flags |= IGB_FLAG_DCA_ENABLED;
@@ -1699,6 +1698,8 @@ static int igb_open(struct net_device *netdev)
 	if (test_bit(__IGB_TESTING, &adapter->state))
 		return -EBUSY;
 
+	netif_carrier_off(netdev);
+
 	/* allocate transmit descriptors */
 	err = igb_setup_all_tx_resources(adapter);
 	if (err)

[net-next-2.6 PATCH 4/5] e1000e: indicate link down at load

[Jeff Kirsher]

From: Jesse Brandeburg <jesse.brandeburg@intel.com>

As reported by Andrew Lutomirski <amluto@gmail.com>

All the intel wired ethernet drivers were calling netif_carrier_off
and netif_stop_queue (or variants) before calling register_netdevice

This is incorrect behavior as was pointed out by davem, and causes
ifconfig and friends to report a strange state before first link
after the driver was loaded, since without a netif_carrier_off, the stack
assumes carrier_on, but before register_netdev, netlink messages are not
sent out telling link state.

This apparently confused *some* versions of networkmanager.

Andy tested this for e1000e and confirmed it was working for him.

see thread: http://marc.info/?l=linux-netdev&m=123946479705636&w=2

Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Tested-by: Andy Lutomirski <amluto@gmail.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
---

 drivers/net/e1000e/netdev.c |    9 +++++----
 1 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/drivers/net/e1000e/netdev.c b/drivers/net/e1000e/netdev.c
index 1693ed1..c0ff550 100644
--- a/drivers/net/e1000e/netdev.c
+++ b/drivers/net/e1000e/netdev.c
@@ -3072,6 +3072,8 @@ static int e1000_open(struct net_device *netdev)
 	if (test_bit(__E1000_TESTING, &adapter->state))
 		return -EBUSY;
 
+	netif_carrier_off(netdev);
+
 	/* allocate transmit descriptors */
 	err = e1000e_setup_tx_resources(adapter);
 	if (err)
@@ -5037,15 +5039,14 @@ static int __devinit e1000_probe(struct pci_dev *pdev,
 	if (!(adapter->flags & FLAG_HAS_AMT))
 		e1000_get_hw_control(adapter);
 
-	/* tell the stack to leave us alone until e1000_open() is called */
-	netif_carrier_off(netdev);
-	netif_tx_stop_all_queues(netdev);
-
 	strcpy(netdev->name, "eth%d");
 	err = register_netdev(netdev);
 	if (err)
 		goto err_register;
 
+	/* carrier off reporting is important to ethtool even BEFORE open */
+	netif_carrier_off(netdev);
+
 	e1000_print_device_info(adapter);
 
 	return 0;

[net-next-2.6 PATCH 5/5] e1000: init link state correctly

[Jeff Kirsher]

From: Jesse Brandeburg <jesse.brandeburg@intel.com>

As reported by Andrew Lutomirski <amluto@gmail.com>

All the intel wired ethernet drivers were calling netif_carrier_off
and netif_stop_queue (or variants) before calling register_netdevice

This is incorrect behavior as was pointed out by davem, and causes
ifconfig and friends to report a strange state before first link
after the driver was loaded.

This apparently confused *some* versions of networkmanager.

Andy tested this for e1000e and confirmed it was working for him.

Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Reported-by: Andrew Lutomirski <amluto@gmail.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
---

 drivers/net/e1000/e1000_main.c |    9 +++++----
 1 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/drivers/net/e1000/e1000_main.c b/drivers/net/e1000/e1000_main.c
index ef12931..9bdcf4d 100644
--- a/drivers/net/e1000/e1000_main.c
+++ b/drivers/net/e1000/e1000_main.c
@@ -1234,15 +1234,14 @@ static int __devinit e1000_probe(struct pci_dev *pdev,
 	    !e1000_check_mng_mode(hw))
 		e1000_get_hw_control(adapter);
 
-	/* tell the stack to leave us alone until e1000_open() is called */
-	netif_carrier_off(netdev);
-	netif_stop_queue(netdev);
-
 	strcpy(netdev->name, "eth%d");
 	err = register_netdev(netdev);
 	if (err)
 		goto err_register;
 
+	/* carrier off reporting is important to ethtool even BEFORE open */
+	netif_carrier_off(netdev);
+
 	DPRINTK(PROBE, INFO, "Intel(R) PRO/1000 Network Connection\n");
 
 	cards_found++;
@@ -1441,6 +1440,8 @@ static int e1000_open(struct net_device *netdev)
 	if (test_bit(__E1000_TESTING, &adapter->flags))
 		return -EBUSY;
 
+	netif_carrier_off(netdev);
+
 	/* allocate transmit descriptors */
 	err = e1000_setup_all_tx_resources(adapter);
 	if (err)

Re: [net-next-2.6 PATCH 1/5] ixgbe: fix link down initial state

[David Miller]

From: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Date: Fri, 17 Apr 2009 23:44:27 -0700

> All the intel wired ethernet drivers were calling netif_carrier_off
> and netif_stop_queue (or variants) before calling register_netdevice
> 
> This is incorrect behavior as was pointed out by davem, and causes
> ifconfig and friends to report a strange state before first link
> after the driver was loaded, since without a netif_carrier_off, the stack
> assumes carrier_on, but before register_netdev, netlink messages are not
> sent out telling link state.

All 5 patches applied, thanks!

FWIW, this is definitely a case where I would have found it just as
appropriate to post one single patch for this.  But that's just me :-)

Re: [net-next-2.6 PATCH 1/5] ixgbe: fix link down initial state

[Jeff Kirsher]

On Mon, Apr 20, 2009 at 2:04 AM, David Miller <davem@davemloft.net> wrote:
> From: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
> Date: Fri, 17 Apr 2009 23:44:27 -0700
>
>> All the intel wired ethernet drivers were calling netif_carrier_off
>> and netif_stop_queue (or variants) before calling register_netdevice
>>
>> This is incorrect behavior as was pointed out by davem, and causes
>> ifconfig and friends to report a strange state before first link
>> after the driver was loaded, since without a netif_carrier_off, the stack
>> assumes carrier_on, but before register_netdev, netlink messages are not
>> sent out telling link state.
>
> All 5 patches applied, thanks!
>
> FWIW, this is definitely a case where I would have found it just as
> appropriate to post one single patch for this.  But that's just me :-)
> --

Good to know, that was discussed, but we thought it would be better
for git logging to have separate patches.

-- 
Cheers,
Jeff