On 6/12/2025 1:46 PM, Bjorn Helgaas wrote:
[+cc Mario, Lukas, Rafael, thunderbolt folks; submitter in bcc Possibly related to https://lore.kernel.org/linux-pci/20250609020223.269407-1-superm1@xxxxxxxxxx/?] Laurent, you mentioned that you see this on 6.15.1. Is this a new problem that you didn't see on older kernels?
I've left a comment on the bug, but this looks expected and yes I feel that my patch series will clean up these messages.
----- Forwarded message from bugzilla-daemon@xxxxxxxxxx ----- https://bugzilla.kernel.org/show_bug.cgi?id=220216 Bug ID: 220216 Summary: Intel Corporation JHL7440 Thunderbolt 3 Bridge: Unable to change power state from D3hot to D0, device inaccessible Regression: No Created attachment 308224 --> https://bugzilla.kernel.org/attachment.cgi?id=308224&action=edit Full dmesg Hello, On debian with kernel 6.15.1, I get the following messages in dmesg: [ 0.453279] pci 0000:02:04.0: [8086:15ef] type 01 class 0x060400 PCIe Switch Downstream Port [ 0.453327] pci 0000:02:04.0: PCI bridge to [bus 04-38] [ 0.453342] pci 0000:02:04.0: bridge window [mem 0x8a000000-0x9fcfffff] [ 0.453360] pci 0000:02:04.0: bridge window [mem 0x6000000000-0x6021ffffff 64bit pref] [ 0.453383] pci 0000:02:04.0: enabling Extended Tags [ 0.453569] pci 0000:02:04.0: supports D1 D2 [ 0.453569] pci 0000:02:04.0: PME# supported from D0 D1 D2 D3hot D3cold [ 0.454686] pci 0000:02:04.0: PCI bridge to [bus 04-38] [ 0.863766] pci 0000:02:04.0: bridge window [io 0x4000-0x4fff]: assigned [ 0.863788] pci 0000:02:04.0: PCI bridge to [bus 04-38] [ 0.863791] pci 0000:02:04.0: bridge window [io 0x4000-0x4fff] [ 0.863797] pci 0000:02:04.0: bridge window [mem 0x8a000000-0x9fcfffff] [ 0.863802] pci 0000:02:04.0: bridge window [mem 0x6000000000-0x6021ffffff 64bit pref] [ 0.865332] pci 0000:02:04.0: Adding to iommu group 18 [ 1.044101] pcieport 0000:02:04.0: pciehp: Slot #4 AttnBtn- PwrCtrl- MRL- AttnInd- PwrInd- HotPlug+ Surprise+ Interlock- NoCompl+ IbPresDis- LLActRep+ [ 1.885142] pcieport 0000:02:04.0: Unable to change power state from D3hot to D0, device inaccessible [ 1.885352] pcieport 0000:02:04.0: Runtime PM usage count underflow! [ 18.615343] pci 0000:02:04.0: [8086:15ef] type 01 class 0x060400 PCIe Switch Downstream Port [ 18.615392] pci 0000:02:04.0: PCI bridge to [bus 00] [ 18.615404] pci 0000:02:04.0: bridge window [io 0x0000-0x0fff] [ 18.615409] pci 0000:02:04.0: bridge window [mem 0x00000000-0x000fffff] [ 18.615429] pci 0000:02:04.0: bridge window [mem 0x00000000-0x000fffff 64bit pref] [ 18.615453] pci 0000:02:04.0: enabling Extended Tags [ 18.615649] pci 0000:02:04.0: supports D1 D2 [ 18.615650] pci 0000:02:04.0: PME# supported from D0 D1 D2 D3hot D3cold [ 18.615903] pci 0000:02:04.0: Adding to iommu group 18 [ 18.616047] pci 0000:02:04.0: bridge configuration invalid ([bus 00-00]), reconfiguring [ 18.617062] pci 0000:02:04.0: PCI bridge to [bus 04-38] [ 18.617099] pci 0000:02:04.0: bridge window [mem 0x00100000-0x001fffff 64bit pref] to [bus 04-38] add_size 100000 add_align 100000 [ 18.617102] pci 0000:02:04.0: bridge window [mem 0x00100000-0x001fffff] to [bus 04-38] add_size 100000 add_align 100000 [ 18.617119] pci 0000:02:04.0: bridge window [mem 0x8a100000-0x9fdfffff]: assigned [ 18.617120] pci 0000:02:04.0: bridge window [mem 0x6000100000-0x6021ffffff 64bit pref]: assigned [ 18.617122] pci 0000:02:04.0: bridge window [io 0x5000-0x5fff]: assigned [ 18.617157] pci 0000:02:04.0: PCI bridge to [bus 04-38] [ 18.617160] pci 0000:02:04.0: bridge window [io 0x5000-0x5fff] [ 18.617167] pci 0000:02:04.0: bridge window [mem 0x8a100000-0x9fdfffff] [ 18.617172] pci 0000:02:04.0: bridge window [mem 0x6000100000-0x6021ffffff 64bit pref] [ 18.617803] pcieport 0000:02:04.0: enabling device (0000 -> 0003) [ 18.617969] pcieport 0000:02:04.0: pciehp: Slot #4 AttnBtn- PwrCtrl- MRL- AttnInd- PwrInd- HotPlug+ Surprise+ Interlock- NoCompl+ IbPresDis- LLActRep+ Note the "Unable to change power state from D3hot to D0, device inaccessible" and "Runtime PM usage count underflow!" Laptop is a Dell latitude 5530
