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[Launchpad Bug Tracker <1448517@xxxxxxxxxxxxxxxxxx>]

[Expired for linux (Ubuntu) because there has been no activity for 60
days.]

** Changed in: linux (Ubuntu)
       Status: Incomplete => Expired

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https://bugs.launchpad.net/bugs/1448517

Title:
  Call Trace: pci_find_upstream_pcie_bridge

Status in linux package in Ubuntu:
  Expired

Bug description:
  Kernel 3.16.0-34-generic #47-Ubuntu SMP Fri Apr 10 18:02:58 UTC 2015
  x86_64 x86_64 x86_64 GNU/Linux , Ubuntu 14.10

  [    0.673598] IOMMU 1 0xfed91000: using Queued invalidation
  [    0.673600] IOMMU: Setting RMRR:
  [    0.673608] IOMMU: Setting identity map for device 0000:00:14.0 [0x9d75c000 - 0x9d78efff]
  [    0.673625] IOMMU: Setting identity map for device 0000:00:1a.0 [0x9d75c000 - 0x9d78efff]
  [    0.673639] IOMMU: Setting identity map for device 0000:00:1d.0 [0x9d75c000 - 0x9d78efff]
  [    0.673648] IOMMU: Prepare 0-16MiB unity mapping for LPC
  [    0.673653] IOMMU: Setting identity map for device 0000:00:1f.0 [0x0 - 0xffffff]
  [    0.673723] PCI-DMA: Intel(R) Virtualization Technology for Directed I/O
  [    0.673788] ------------[ cut here ]------------
  [    0.673793] WARNING: CPU: 2 PID: 1 at /build/buildd/linux-3.16.0/drivers/pci/search.c:131 pci_find_upstream_pcie_bridge+0x65/0x90()
  [    0.673795] Modules linked in:
  [    0.673798] CPU: 2 PID: 1 Comm: swapper/0 Not tainted 3.16.0-34-generic #47-Ubuntu
  [    0.673800] Hardware name: To Be Filled By O.E.M. To Be Filled By O.E.M./Z77 Extreme4, BIOS P2.70 11/28/2012
  [    0.673802]  0000000000000009 ffff88040a1ebd30 ffffffff8178416e 0000000000000000
  [    0.673805]  ffff88040a1ebd68 ffffffff8106fefd ffff880409aa2098 ffff880409aa2000
  [    0.673807]  ffff880409aa2098 0000000000000000 0000000000000000 ffff88040a1ebd78
  [    0.673810] Call Trace:
  [    0.673813]  [<ffffffff8178416e>] dump_stack+0x45/0x56
  [    0.673816]  [<ffffffff8106fefd>] warn_slowpath_common+0x7d/0xa0
  [    0.673819]  [<ffffffff8106ffda>] warn_slowpath_null+0x1a/0x20
  [    0.673821]  [<ffffffff813e85f5>] pci_find_upstream_pcie_bridge+0x65/0x90
  [    0.673824]  [<ffffffff8165370e>] intel_iommu_add_device+0x3e/0x210
  [    0.673828]  [<ffffffff81649060>] ? bus_set_iommu+0x50/0x50
  [    0.673830]  [<ffffffff8164908a>] add_iommu_group+0x2a/0x60
  [    0.673834]  [<ffffffff814d14fb>] bus_for_each_dev+0x6b/0xb0
  [    0.673836]  [<ffffffff81649058>] bus_set_iommu+0x48/0x50
  [    0.673840]  [<ffffffff81d9ae58>] intel_iommu_init+0x504/0x58a
  [    0.673842]  [<ffffffff81d4d211>] ? memblock_find_dma_reserve+0x13c/0x13c
  [    0.673844]  [<ffffffff81d4d223>] pci_iommu_init+0x12/0x3c
  [    0.673847]  [<ffffffff81002148>] do_one_initcall+0xd8/0x210
  [    0.673850]  [<ffffffff81092b9d>] ? parse_args+0x21d/0x4e0
  [    0.673853]  [<ffffffff81d4311d>] kernel_init_freeable+0x190/0x218
  [    0.673857]  [<ffffffff81777570>] ? rest_init+0x80/0x80
  [    0.673859]  [<ffffffff8177757e>] kernel_init+0xe/0xf0
  [    0.673862]  [<ffffffff8178c0fc>] ret_from_fork+0x7c/0xb0
  [    0.673864]  [<ffffffff81777570>] ? rest_init+0x80/0x80
  [    0.673870] ---[ end trace 1cf60c0c13553ce0 ]---
  [    0.675389] RAPL PMU detected, hw unit 2^-16 Joules, API unit is 2^-32 Joules, 3 fixed counters 163840 ms ovfl timer

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