Bug 86591

Summary:	[BISECTED]ixgbe driver fails occasionally since ee98b577e7711d5890ded2c7b05578a29512bd39
Product:	Drivers	Reporter:	Scott Harrison (scoharr2)
Component:	Network	Assignee:	drivers_network (drivers_network)
Status:	NEW ---
Severity:	normal	CC:	alan, szg00000
Priority:	P1
Hardware:	All
OS:	Linux
Kernel Version:	3.16.1	Subsystem:
Regression:	Yes	Bisected commit-id:

Description Scott Harrison 2014-10-20 11:55:26 UTC

lspci ->

03:00.0 Ethernet controller: Intel Corporation 82599EB 10-Gigabit SFI/SFP+ Netwo
rk Connection (rev 01)                                                          
03:00.1 Ethernet controller: Intel Corporation 82599EB 10-Gigabit SFI/SFP+ Netwo
rk Connection (rev 01)

With the fibre 10Gbs SFP occasionally on reboot we get

[   15.104726] ixgbe 0000:03:00.0 eth0: detected SFP+: 5                        
[   19.735155] ixgbe 0000:03:00.0 eth0: setup link failed with code -14  

Probably about 1 in 10 boots.  With the 1Gbs Copper SFP it works fine.  kernel 3.14.8 worked fine, but on upgrading to 3.16.1 it fails in this way.  I have narrowed it down to the commit

https://git.kernel.org/cgit/linux/kernel/git/stable/linux-stable.git/commit/?id=ee98b577e7711d5890ded2c7b05578a29512bd39

I don't know enough about the hardware to understand why the change sometimes causes the failure, and was hoping someone else would.  Reverting this commit on 3.16.1 fixes the issue.

If you need any more information please ask.

Comment 1 Alan 2014-10-23 13:47:27 UTC

Please post a summary of this to netdev@vger.kernel.org including the bisection problem commit. (You don't need to be subscribed)