FYI, we noticed the following commit (built with gcc-7): commit: 035845afbe9843c294184a0462288164f1d27553 ("usb: xhci: Cleanup xhci_dbg usages in unexpected conditions") git://bee.sh.intel.com/git/blu2/usb.git usb/xhci/dbc/beta-v4-beta-2 in testcase: idle with following parameters: runtime: 10m on test machine: 8 threads Intel(R) Atom(TM) CPU C2750 @ 2.40GHz with 16G memory caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace): [ 17.612454] xhci_hcd 0000:03:00.0: Failed to enable MWI PCI transaction To reproduce: git clone https://github.com/intel/lkp-tests.git cd lkp-tests bin/lkp install job.yaml # job file is attached in this email bin/lkp run job.yaml Thanks, Xiaolong