On Sat, May 26, 2012 at 2:25 AM, Antonio Quartulli <ordex@xxxxxxxxxxxxx> wrote: > Hello, > > I'm getting this warning with linux-3.4.0. My laptop is a DELL E5420. > Please tell me if you need further testing/debug. Hi Antonio, Thanks for the report. Is this a regression? If so, what's the most recent kernel that works correctly? Can you collect a complete dmesg log and the output of "lspci -vv"? > [ 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 > > > > -- > Antonio Quartulli > > ..each of us alone is worth nothing.. > Ernesto "Che" Guevara -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
