[bugzilla-daemon@kernel.org: [Bug 220010] New: Regression: 6.14.2 breaks PCI passthrough, qemu-system-x86_64: no available reset mechanism]

[bugzilla-daemon@kernel.org: [Bug 220010] New: Regression: 6.14.2 breaks PCI passthrough, qemu-system-x86_64: no available reset mechanism]

[Bjorn Helgaas]

Forwarding to linux-pci just for completeness.

https://git.kernel.org/cgit/linux/kernel/git/pci/pci.git/commit/?id=bc0b828ef6e5
is queued on pci/for-linus for v6.15 and stable.

----- Forwarded message from bugzilla-daemon@kernel.org -----

Subject: [Bug 220010] New: Regression: 6.14.2 breaks PCI passthrough,
	qemu-system-x86_64: no available reset mechanism

https://bugzilla.kernel.org/show_bug.cgi?id=220010

Created attachment 307958
  --> https://bugzilla.kernel.org/attachment.cgi?id=307958&action=edit
lspci

Device: Asus Zephyrus GA402RJ
dGPU: RX 6700S
Kernel: 6.14.2

03:00.0: dGPU (IOMMU Group 16)
03:00.1: GPU Audio Controller (IOMMU Group 17)

qemu-system-x86_64: vfio: Cannot reset device 0000:03:00.1, no available reset
mechanism.
qemu-system-x86_64: vfio: Cannot reset device 0000:03:00.0, no available reset
mechanism.

BISECTED: 792bd08a41bdc309e08ff4d429f670cbb30f2b63

03:00.0 does have `bus` in `03:00.0/reset_method`, and `03:00.1` does not have
`03:00.1/reset` file. 

Removing `03:00.1` from PCI passthrough still shows error:
qemu-system-x86_64: vfio: Cannot reset device 0000:03:00.0, no available reset
mechanism.

Attached lspci -vv output

----- End forwarded message -----