https://bugzilla.kernel.org/show_bug.cgi?id=207489 LimeTech (tomm@xxxxxxxxxxxxxxxxxxx) changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |tomm@xxxxxxxxxxxxxxxxxxx --- Comment #15 from LimeTech (tomm@xxxxxxxxxxxxxxxxxxx) --- Kernel 5.6.12 Win10 VM with 8 cores assigned and with a USB controller passed through. Trying to add a 2nd pass through device in a different IOMMU group produces this error. Confirmed, applying patch fixes the issue. -- You are receiving this mail because: You are on the CC list for the bug. You are watching the assignee of the bug.