On 3/13/25 03:34, Heiner Kallweit wrote:
Since "iommu: Get DT/ACPI parsing into the proper probe path" I get the following on a N100-based mini pc. The warning pops up 4 times, for: PNP0C14:00 PNP0C14:01 PNP0C14:00 PNP0C14:01 Any other info you'd be interested in? [ +0.000139] Unpacking initramfs... [ +0.000690] ------------[ cut here ]------------ [ +0.000028] acpi-wmi PNP0C14:00: late IOMMU probe at driver bind, something fishy here! [ +0.000041] WARNING: CPU: 1 PID: 1 at drivers/iommu/iommu.c:449 __iommu_probe_device+0x12b/0x530 [ +0.000034] Modules linked in: [ +0.000024] CPU: 1 UID: 0 PID: 1 Comm: swapper/0 Not tainted 6.14.0-rc6-next-20250312+ #2 [ +0.000029] Hardware name: Default string Default string/Default string, BIOS ADLN.M6.SODIMM.ZB.CY.015 08/08/2023 [ +0.000032] RIP: 0010:__iommu_probe_device+0x12b/0x530 [ +0.000019] Code: 68 00 74 28 4c 8b 73 50 4d 85 f6 75 03 4c 8b 33 48 89 df e8 d7 ec 00 00 4c 89 f2 48 c7 c7 b8 91 7b 9e 48 89 c6 e8 f5 3e 96 ff > [ +0.000055] RSP: 0000:ffffb031c006fc98 EFLAGS: 00010282 [ +0.000021] RAX: 0000000000000000 RBX: ffff9469416c5010 RCX: 0000000000000000 [ +0.000023] RDX: 0000000000000002 RSI: 0000000000000003 RDI: 00000000ffffffff [ +0.000023] RBP: ffffb031c006fcd8 R08: 0000000000000000 R09: ffffb031c006fae8 [ +0.000023] R10: ffffffff9eb1ea68 R11: 0000000000000003 R12: ffffffff9e485280 [ +0.000023] R13: ffffb031c006fd70 R14: ffff946940bb8ec0 R15: 0000000000000000 [ +0.000023] FS: 0000000000000000(0000) GS:ffff946b18bec000(0000) knlGS:0000000000000000 [ +0.000037] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ +0.000020] CR2: 0000000000000000 CR3: 000000016c650001 CR4: 0000000000770ef0 [ +0.000023] PKRU: 55555554 [ +0.000012] Call Trace: [ +0.000010] <TASK> [ +0.000011] ? show_regs.part.0+0x1d/0x30 [ +0.000019] ? show_regs.cold+0x8/0xd [ +0.000016] ? __iommu_probe_device+0x12b/0x530 [ +0.000017] ? __warn.cold+0xc2/0x15e [ +0.000018] ? __iommu_probe_device+0x12b/0x530 [ +0.000017] ? report_bug+0xe3/0x170 [ +0.000016] ? console_unlock+0x7d/0x110 [ +0.000018] ? __iommu_probe_device+0x12b/0x530 [ +0.000016] ? __iommu_probe_device+0x12d/0x530 [ +0.000017] ? handle_bug+0x116/0x170 [ +0.000018] ? exc_invalid_op+0x18/0x70 [ +0.000017] ? asm_exc_invalid_op+0x1b/0x20 [ +0.000022] ? __iommu_probe_device+0x12b/0x530 [ +0.000018] ? __iommu_probe_device+0x12b/0x530 [ +0.000019] ? __pfx_probe_iommu_group+0x10/0x10 [ +0.000017] probe_iommu_group+0x26/0x50 [ +0.000016] bus_for_each_dev+0x79/0xd0 [ +0.000020] iommu_device_register+0xbe/0x230 [ +0.000021] intel_iommu_init+0xd76/0xf40 [ +0.000016] ? _raw_spin_unlock_irqrestore+0x55/0x80 [ +0.000022] ? __this_cpu_preempt_check+0x13/0x20 [ +0.000018] ? lockdep_hardirqs_on+0x7d/0x110 [ +0.000018] ? trace_hardirqs_on+0x5b/0xd0 [ +0.000017] ? _raw_spin_unlock_irqrestore+0x3c/0x80 [ +0.000020] ? __pfx_pci_iommu_init+0x10/0x10 [ +0.000021] pci_iommu_init+0xd/0x40
The fix is here. https://lore.kernel.org/linux-iommu/72a4853e7ef36e7c1c4ca171ed4ed8e1a463a61a.1741791691.git.robin.murphy@xxxxxxx/ Thanks, baolu
