Edit: Retry, as I did not consider, that my mail-client would make this party html. Dear maintainers, I recently encountered an issue on my Proxmox server system, that includes a Qualcomm QCA6174 m.2 PCIe wifi module. https://deviwiki.com/wiki/AIRETOS_AFX-QCA6174-NX On system boot and subsequent virtual machine start (with passed-through QCA6174), the VM would just freeze/hang, at the point where the ath10k driver loads. Quick search in the proxmox related topics, brought me to the following discussion, which suggested a PCI quirk entry for the QCA6174 in the kernel: https://forum.proxmox.com/threads/pcie-passthrough-freezes-proxmox.27513/ I then went ahead, got the Proxmox kernel source (v5.4.106) and applied the attached patch. Effect was as hoped, that the VM hangs are now gone. System boots and runs as intended. Judging by the existing quirk entries for Atheros, I would think, that my proposed "fix" could be included in the vanilla kernel. As far as I saw, there is no entry yet, even in the latest kernel sources. Thank you very much! Best regards, Ingmar
diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c index 706f27a86a8e..ecfe80ec5b9c 100644 --- a/drivers/pci/quirks.c +++ b/drivers/pci/quirks.c @@ -3584,6 +3584,7 @@ DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_ATHEROS, 0x0032, quirk_no_bus_reset); DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_ATHEROS, 0x003c, quirk_no_bus_reset); DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_ATHEROS, 0x0033, quirk_no_bus_reset); DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_ATHEROS, 0x0034, quirk_no_bus_reset); +DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_ATHEROS, 0x003e, quirk_no_bus_reset); /* * Root port on some Cavium CN8xxx chips do not successfully complete a bus
