Hello linux-usb. I am seeing this message every time a server is rebooted, and it started around 5.2 release. It is benign behavior but it does not occur in prior 4.18 Linux kernels. Kernel 5.6.0-rc1.01.el8uek.rc1.x86_64 on an x86_64 [ 836.063284] irq 18: nobody cared (try booting with the "irqpoll" option) [ 836.143498] CPU: 24 PID: 0 Comm: swapper/24 Kdump: loaded Not tainted 5.3.6.jpd.01.+ #5 [ 836.239310] Hardware name: Oracle Corporation ORACLE SERVER X5-2/ASM,MOTHERBOARD,1U, BIOS 30140300 09/20/2018 [ 836.358010] Call Trace: [ 836.387248] <IRQ> [ 836.411298] dump_stack+0x63/0x8a [ 836.450951] __report_bad_irq+0x3c/0xb6 [ 836.496830] note_interrupt.cold.10+0xb/0x5d [ 836.547916] handle_irq_event_percpu+0x6f/0x80 [ 836.601077] handle_irq_event+0x3b/0x5a [ 836.646962] handle_fasteoi_irq+0x90/0x130 [ 836.695968] handle_irq+0x20/0x30 [ 836.711139] megaraid_sas 0000:23:00.0: megasas_disable_intr_fusion is called outbound_intr_mask:0x40000009 [ 836.735612] do_IRQ+0x4e/0xe0 [ 836.735616] common_interrupt+0xf/0xf [ 836.735619] </IRQ> [ 336.622666] [<0000000010b50533>] usb_hcd_irq [ 336.673746] [<0000000010b50533>] usb_hcd_irq Device info : lsusb -t /: Bus 02.Port 1: Dev 1, Class=root_hub, Driver=ehci-pci/2p, 480M |__ Port 1: Dev 2, If 0, Class=Hub, Driver=hub/8p, 480M /: Bus 01.Port 1: Dev 1, Class=root_hub, Driver=ehci-pci/2p, 480M |__ Port 1: Dev 2, If 0, Class=Hub, Driver=hub/6p, 480M [root@ca-dev55 ~]# PCI infö : [root@ca-dev55 kernel]# lspci -s 00:1d.0 -k -vv 00:1d.0 USB controller: Intel Corporation C610/X99 series chipset USB Enhanced Host Controller #1 (rev 05) (prog-if 20 [EHCI]) Subsystem: Oracle/SUN Device 4852 Control: I/O- Mem+ BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr+ Stepping- SERR+ FastB2B- DisINTx- Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx- Interrupt: pin C routed to IRQ 18 NUMA node: 0 Region 0: Memory at c7501000 (32-bit, non-prefetchable) [size=1K] Capabilities: [50] Power Management version 2 Flags: PMEClk- DSI- D1- D2- AuxCurrent=375mA PME(D0+,D1-,D2-,D3hot+,D3cold+) Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME- Capabilities: [58] Debug port: BAR=1 offset=00a0 Capabilities: [98] PCI Advanced Features AFCap: TP+ FLR+ AFCtrl: FLR- AFStatus: TP- Kernel modules: ehci_pci # cat /sys/kernel/irq/18/* ehci_hcd:usb1,ehci_hcd:usb2 IR-IO-APIC 18 fasteoi 0,0,0,0,0,0,0,0,60,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 level There are no USB devices attached to these ports ( like a keyboard or mouse ) so I am not sure why it would be producing spurious interrupts . We have ehci_pci and echo_hcd components compiled in the kernel ,but the behavior also occurs when those drivers are created as loadable modules . If I removed the modules using rmmod prior to Linux shutdown the issue does not occur . Any suggestions ? Thank you. John Oracle Linux team.
