[+cc Alex] On Sun, Dec 8, 2013 at 7:26 AM, Antonio Quartulli <[email protected]> wrote: > On 29/05/12 10:56, Antonio Quartulli wrote: >> On Tue, May 29, 2012 at 10:35:53 +0200, Joerg Roedel wrote: >>> Hi Antonio, >>> >>> On Sat, May 26, 2012 at 09:09:52AM -0600, Bjorn Helgaas wrote: >>>> On Sat, May 26, 2012 at 2:25 AM, Antonio Quartulli <[email protected]> >>>> wrote: >>>>> [ 1.054279] WARNING: at drivers/pci/search.c:44 >>>>> pci_find_upstream_pcie_bridge+0x5e/0x70() >>>>> [ 1.054385] Hardware name: Latitude E5420 >>>>> [ 1.054457] Modules linked in: >>>>> [ 1.054568] Pid: 1, comm: swapper/0 Not tainted 3.4.0ordex+ #3 >>>>> [ 1.054643] Call Trace: >>>>> [ 1.054716] [<ffffffff81033d4a>] warn_slowpath_common+0x7a/0xb0 >>>>> [ 1.054793] [<ffffffff81033d95>] warn_slowpath_null+0x15/0x20 >>>>> [ 1.054869] [<ffffffff8123899e>] >>>>> pci_find_upstream_pcie_bridge+0x5e/0x70 >>>>> [ 1.054949] [<ffffffff813babe7>] intel_iommu_device_group+0x77/0x100 >>>>> [ 1.055027] [<ffffffff813b52d5>] add_iommu_group+0x35/0x60 >>>>> [ 1.055113] [<ffffffff813b52a0>] ? bus_set_iommu+0x50/0x50 >>>>> [ 1.055191] [<ffffffff8132c586>] bus_for_each_dev+0x56/0x90 >>>>> [ 1.055267] [<ffffffff813b528b>] bus_set_iommu+0x3b/0x50 >>>>> [ 1.055344] [<ffffffff818c4920>] intel_iommu_init+0xab0/0xb3f >>>>> [ 1.055421] [<ffffffff81120b26>] ? sys_mkdirat+0x76/0xd0 >>>>> [ 1.055499] [<ffffffff8189b0db>] ? >>>>> memblock_find_dma_reserve+0x13d/0x13d >>>>> [ 1.055578] [<ffffffff8189b0ee>] pci_iommu_init+0x13/0x3e >>>>> [ 1.055655] [<ffffffff810001ca>] do_one_initcall+0x3a/0x170 >>>>> [ 1.055732] [<ffffffff81897c35>] kernel_init+0x148/0x1cc >>>>> [ 1.055807] [<ffffffff81897588>] ? do_early_param+0x86/0x86 >>>>> [ 1.055884] [<ffffffff814fc914>] kernel_thread_helper+0x4/0x10 >>>>> [ 1.055963] [<ffffffff8105de60>] ? finish_task_switch+0x80/0x110 >>>>> [ 1.056040] [<ffffffff814fafdd>] ? retint_restore_args+0xe/0xe >>>>> [ 1.056126] [<ffffffff81897aed>] ? start_kernel+0x30b/0x30b >>>>> [ 1.056203] [<ffffffff814fc910>] ? gs_change+0xb/0xb >>> >>> Hmm, this looks like pci_find_upstream_pcie_bridge() found a PCIe device >>> in the chain which is not a bridge. Can you please post the output of >>> 'lspci -vvv' and 'lspci -t'? >>> >> >> attached! >> Some days ago I tried to put some printk in the code and, as far as I can >> understand, you are right. >> >> I hope my lspci output will help! >> >> Cheers, >> > > Hi guys, > > was there any progress about this? > Right now I am using linux-3.10.22 and the WARNING is still present. > The system seems to be working fine, but I don't know if this issue can > trigger side effects or not.
Alex and I prototyped some IOMMU and PCI restructuring [1] to avoid this case, but I haven't heard anything lately. Bjorn [1] http://lkml.kernel.org/r/[email protected] _______________________________________________ iommu mailing list [email protected] https://lists.linuxfoundation.org/mailman/listinfo/iommu
