[PATCH net-next] igb: increase timeout for ethtool offline self-test

[PATCH net-next] igb: increase timeout for ethtool offline self-test

[Stefan Assmann]

On several machines with i350 adapters the ethtool offline self-test sometimes
fails. This happens because link auto negotiation may take longer than the
timeout of 4 seconds. Increasing the timeout by 1 seconds resolves the issue.

Output from a failing i350 offline self-test:
while [ 1 ]; do ethtool -t eth2 offline; done
The test result is PASS
The test extra info:
Register test  (offline)         0
Eeprom test    (offline)         0
Interrupt test (offline)         0
Loopback test  (offline)         0
Link test   (on/offline)         0

The test result is FAIL
The test extra info:
Register test  (offline)         0
Eeprom test    (offline)         0
Interrupt test (offline)         0
Loopback test  (offline)         0
Link test   (on/offline)         1

The test result is PASS
The test extra info:
Register test  (offline)         0
Eeprom test    (offline)         0
Interrupt test (offline)         0
Loopback test  (offline)         0
Link test   (on/offline)         0

Signed-off-by: Stefan Assmann <sassmann@kpanic.de>
---
 drivers/net/ethernet/intel/igb/igb_ethtool.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/intel/igb/igb_ethtool.c b/drivers/net/ethernet/intel/igb/igb_ethtool.c
index 40b5d56..a3830a8 100644
--- a/drivers/net/ethernet/intel/igb/igb_ethtool.c
+++ b/drivers/net/ethernet/intel/igb/igb_ethtool.c
@@ -1891,7 +1891,7 @@ static int igb_link_test(struct igb_adapter *adapter, u64 *data)
 	} else {
 		hw->mac.ops.check_for_link(&adapter->hw);
 		if (hw->mac.autoneg)
-			msleep(4000);
+			msleep(5000);
 
 		if (!(rd32(E1000_STATUS) & E1000_STATUS_LU))
 			*data = 1;
-- 
1.8.1

Re: [PATCH net-next] igb: increase timeout for ethtool offline self-test

[Jeff Kirsher]

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On Fri, 2013-02-01 at 16:21 +0100, Stefan Assmann wrote:
> On several machines with i350 adapters the ethtool offline self-test
> sometimes
> fails. This happens because link auto negotiation may take longer than
> the
> timeout of 4 seconds. Increasing the timeout by 1 seconds resolves the
> issue.
> 
> Output from a failing i350 offline self-test:
> while [ 1 ]; do ethtool -t eth2 offline; done
> The test result is PASS
> The test extra info:
> Register test  (offline)         0
> Eeprom test    (offline)         0
> Interrupt test (offline)         0
> Loopback test  (offline)         0
> Link test   (on/offline)         0
> 
> The test result is FAIL
> The test extra info:
> Register test  (offline)         0
> Eeprom test    (offline)         0
> Interrupt test (offline)         0
> Loopback test  (offline)         0
> Link test   (on/offline)         1
> 
> The test result is PASS
> The test extra info:
> Register test  (offline)         0
> Eeprom test    (offline)         0
> Interrupt test (offline)         0
> Loopback test  (offline)         0
> Link test   (on/offline)         0
> 
> Signed-off-by: Stefan Assmann <sassmann@kpanic.de>
> ---
>  drivers/net/ethernet/intel/igb/igb_ethtool.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-) 

Thanks Stefan, I will add the patch to my queue!

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