Hi Alexander,

FYI, we noticed the below changes on

git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci.git pci/msi
commit 4ab2ee7c77875669230a797a3ed2228990f82545 ("PCI/MSI: Rename pci_msi_check_device() to pci_msi_supported()")


+-----------------------------------------------------+------------+------------+
|                                                     | 888215f389 | 4ab2ee7c77 |
+-----------------------------------------------------+------------+------------+
| boot_successes                                      | 15         | 2          |
| early-boot-hang                                     | 1          |            |
| boot_failures                                       | 0          | 13         |
| WARNING:at_drivers/pci/msi.c:pci_enable_msi_range() | 0          | 5          |
| WARNING:at_fs/sysfs/dir.c:sysfs_warn_dup()          | 0          | 5          |
| backtrace:ip_auto_config                            | 0          | 5          |
| backtrace:kernel_init_freeable                      | 0          | 5          |
| BUG:kernel_test_crashed                             | 0          | 8          |
+-----------------------------------------------------+------------+------------+


[    5.410055] evm: HMAC attrs: 0x1
[    5.413893] rtc_cmos 00:01: setting system clock to 2014-09-25 00:13:24 UTC (1411604004)
[    5.447469] ------------[ cut here ]------------
[    5.452212] WARNING: CPU: 0 PID: 1 at drivers/pci/msi.c:1034 pci_enable_msi_range+0x2c1/0x2f0()
[    5.462479] Modules linked in:
[    5.465712] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 3.17.0-rc2-00011-g4ab2ee7 #1
[    5.473467] Hardware name: Supermicro X7DB8/X7DB8, BIOS 6.00 04/28/2006
[    5.480202]  0000000000000009 ffff880139ab7c00 ffffffff8185b75a 0000000000000000
[    5.488043]  ffff880139ab7c38 ffffffff8107056d 0000000000000001 ffff88007f8ec000
[    5.495879]  ffff88013974e098 ffff88013974e000 ffff88007f8ecdb8 ffff880139ab7c48
[    5.503722] Call Trace:
[    5.506293]  [<ffffffff8185b75a>] dump_stack+0x4d/0x66
[    5.511552]  [<ffffffff8107056d>] warn_slowpath_common+0x7d/0xa0
[    5.517675]  [<ffffffff8107064a>] warn_slowpath_null+0x1a/0x20
[    5.523631]  [<ffffffff81449961>] pci_enable_msi_range+0x2c1/0x2f0
[    5.529932]  [<ffffffff815b490a>] e1000_open+0x22a/0x4b0
[    5.535368]  [<ffffffff8172d466>] __dev_open+0xb6/0x130
[    5.540712]  [<ffffffff8172d77d>] __dev_change_flags+0x9d/0x160
[    5.546754]  [<ffffffff8172d869>] dev_change_flags+0x29/0x70
[    5.552534]  [<ffffffff81e5707e>] ip_auto_config+0x1c4/0xe7f
[    5.558314]  [<ffffffff81e56eba>] ? root_nfs_parse_addr+0xba/0xba
[    5.564529]  [<ffffffff81405f1e>] ? kasprintf+0x3e/0x40
[    5.569876]  [<ffffffff81e56eba>] ? root_nfs_parse_addr+0xba/0xba
[    5.576091]  [<ffffffff81002130>] do_one_initcall+0xc0/0x1f0
[    5.581871]  [<ffffffff81002130>] ? do_one_initcall+0xc0/0x1f0
[    5.587826]  [<ffffffff8108f000>] ? parse_args+0x180/0x4e0
[    5.593436]  [<ffffffff81df511b>] kernel_init_freeable+0x1b3/0x23b
[    5.599735]  [<ffffffff8184ed70>] ? rest_init+0x90/0x90
[    5.605079]  [<ffffffff8184ed7e>] kernel_init+0xe/0xf0
[    5.610341]  [<ffffffff8186437c>] ret_from_fork+0x7c/0xb0
[    5.615861]  [<ffffffff8184ed70>] ? rest_init+0x90/0x90
[    5.621207] ---[ end trace 3e09fff841f00690 ]---
[    5.625958] e1000e 0000:06:00.0: irq 27 for MSI/MSI-X

Thanks,
Fengguang