netdev - igbvf warning on 3.14.x

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Date:	Fri, 15 Aug 2014 15:14:26 +0200
From:	William Dauchy <william@...di.net>
To:	netdev@...r.kernel.org
Cc:	Jeff Kirsher <jeffrey.t.kirsher@...el.com>
Subject: igbvf warning on 3.14.x

Hello,

I'm sometimes getting the following trace on a 3.14.x x86_64
the boot cmdline has igb.max_vfs=2

igbvf 0000:01:10.3: PF still resetting
igbvf 0000:01:10.1: PF still resetting
------------[ cut here ]------------
WARNING: CPU: 11 PID: 1 at
drivers/net/ethernet/intel/igbvf/netdev.c:1718 igbvf_close+0x66/0x70()
CPU: 11 PID: 1 Comm: swapper/0 Not tainted 3.14.17 #1
Hardware name: Dell       C6100           /0D61XP, BIOS 1.69 06/22/2012
 0000000000000009 ffffffffa95a5d15 0000000000000000 ffffffffa90954e8
 ffff880c1d33e000 ffff880c1d33e7c0 8000000000000000 0000000000000001
 0000000000000001 ffffffffa93a6676 ffff880c1d33e000 ffffc9000624bdb8
Call Trace:
 [<ffffffffa95a5d15>] ? dump_stack+0x49/0x7c
 [<ffffffffa90954e8>] ? warn_slowpath_common+0x68/0x80
 [<ffffffffa93a6676>] ? igbvf_close+0x66/0x70
 [<ffffffffa946d878>] ? __dev_close_many+0x88/0xe0
 [<ffffffffa946d9f5>] ? __dev_close+0x25/0x40
 [<ffffffffa947440b>] ? __dev_change_flags+0xab/0x180
 [<ffffffffa94744fe>] ? dev_change_flags+0x1e/0x60
 [<ffffffffa9c401fb>] ? ic_close_devs+0x2c/0x40
 [<ffffffffa9c41946>] ? ip_auto_config+0xbf3/0xec7
 [<ffffffffa9273890>] ? kset_register+0x50/0x70
 [<ffffffffa909a2fe>] ? __insert_resource+0x1e/0x130
 [<ffffffffa9c40d53>] ? root_nfs_parse_addr+0xa7/0xa7
 [<ffffffffa9c10ee5>] ? do_one_initcall+0x8c/0x107
 [<ffffffffa9c110ba>] ? kernel_init_freeable+0x15a/0x1e1
 [<ffffffffa9c10857>] ? do_early_param+0x9b/0x9b
 [<ffffffffa959e9f0>] ? rest_init+0x80/0x80
 [<ffffffffa959e9f5>] ? kernel_init+0x5/0xf0
 [<ffffffffa95ac764>] ? ret_from_fork+0x74/0xa0
 [<ffffffffa959e9f0>] ? rest_init+0x80/0x80
---[ end trace 90b2a2646f143695 ]---
igbvf 0000:01:10.1: PF still resetting
igbvf 0000:01:10.3: PF still resetting
ixgbe 0000:03:00.0: removed PHC on eth6
ixgbe 0000:03:00.1: removed PHC on eth7


What can I do to help debug this trace? Or should I consider this a
normal case?

Regards,
-- 
William

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