WARNING: at drivers/pci/intel-iommu.c:3148 quirk_ioat_snb_local_iommu+0xbc/0xd0()

Issue

*System gave the following warning:

:WARNING: at drivers/pci/intel-iommu.c:3148 quirk_ioat_snb_local_iommu+0xbc/0xd0() (Not tainted)
:Hardware name: X7DWA
:BIOS assigned incorrect VT-d unit for Intel(R) QuickData Technology device
:Modules linked in: ioatdma(+) dca shpchp ext4 jbd2 mbcache usb_storage sr_mod cdrom sd_mod crc_t10dif firewire_ohci firewire_core crc_itu_t pata_acpi ata_generic ata_piix nouveau ttm drm_kms_helper drm i2c_algo_bit i2c_core mxm_wmi video output wmi dm_mirror dm_region_hash dm_log dm_mod [last unloaded: scsi_wait_scan]
:Pid: 739, comm: modprobe Not tainted 2.6.32-358.23.2.el6.x86_64 #1
:Call Trace:
:[<ffffffff8106e3e7>] ? warn_slowpath_common+0x87/0xc0
:[<ffffffff8106e47f>] ? warn_slowpath_fmt_taint+0x3f/0x50
:[<ffffffff812af3cc>] ? quirk_ioat_snb_local_iommu+0xbc/0xd0
:[<ffffffff812985c5>] ? pci_fixup_device+0xd5/0x210
:[<ffffffff8129745c>] ? do_pci_enable_device+0x5c/0x70
:[<ffffffff812974d8>] ? __pci_enable_device_flags+0x68/0x80
:[<ffffffff81297503>] ? pci_enable_device+0x13/0x20
:[<ffffffff81297570>] ? pcim_enable_device+0x60/0xc0
:[<ffffffffa02ae573>] ? ioat_pci_probe+0x18/0x184 [ioatdma]
:[<ffffffff812994a7>] ? local_pci_probe+0x17/0x20
:[<ffffffff8129a691>] ? pci_device_probe+0x101/0x120
:[<ffffffff8135f1f2>] ? driver_sysfs_add+0x62/0x90
:[<ffffffff8135f390>] ? driver_probe_device+0xa0/0x2a0
:[<ffffffff8135f63b>] ? __driver_attach+0xab/0xb0
:[<ffffffff8135f590>] ? __driver_attach+0x0/0xb0
:[<ffffffff8135e944>] ? bus_for_each_dev+0x64/0x90
:[<ffffffff8135f12e>] ? driver_attach+0x1e/0x20
:[<ffffffff8135e178>] ? bus_add_driver+0x1e8/0x2b0
:[<ffffffff8135f986>] ? driver_register+0x76/0x140
:[<ffffffff8129a8f6>] ? __pci_register_driver+0x56/0xd0
:[<ffffffffa01fc000>] ? ioat_init_module+0x0/0x85 [ioatdma]
:[<ffffffffa01fc000>] ? ioat_init_module+0x0/0x85 [ioatdma]
:[<ffffffffa01fc06d>] ? ioat_init_module+0x6d/0x85 [ioatdma]
:[<ffffffff8100204c>] ? do_one_initcall+0x3c/0x1d0
:[<ffffffff810b75c1>] ? sys_init_module+0xe1/0x250
:[<ffffffff8100b072>] ? system_call_fastpath+0x16/0x1b