On Mon, Feb 28, 2022 at 08:12:47PM +0000, micklorain wrote: > Hi, > > This patch breaks USB for me. I noticed when I upgraded from debian's 4.19.0-18 (working) to 5.10.0-10 (broken). I git bisect'ed until I found that this patch is the culprit. Upstream 5.17.0-rc2 is still broken, but 5.17.0-rc2 with this patch reverted works. > > lsusb when things work : > https://paste.debian.net/hidden/2a964425/ > > lsusb when things are broken : > https://paste.debian.net/hidden/0376920c/ > > dmesg when things are broken : > https://paste.debian.net/hidden/780ca112/ > > dmesg when things work : > https://paste.debian.net/hidden/4d1bfc0f/ > > Let me know if you need anything else from me. Thanks for your report! Last time I have got something similar it becomes that PCI bridge which is used to connect USB controller to the PCI Root Bridge was not capable of MSI, while advertising that capability. I.o.w. HW bug. To understand if it's something similar, please run (under the root) each of the following commands: lspci -nk -vvv cat /proc/interrupts in both cases, i.e. working and non-working. And then share the output (all 4 files). -- With Best Regards, Andy Shevchenko
