Re: IBM Power S822LC: pci 0021:0d:00.0: xHCI HW did not halt within 32000 usec status = 0x0

[Cc: +linuxppc-dev]

Dear Michal,


Thank you for your reply.

Am 06.05.26 um 19:30 schrieb Michal Pecio:

On Wed, 6 May 2026 18:06:20 +0200, Paul Menzel wrote:

quoted

On the IBM Power S822LC (8335-GCA POWER8), rebooting into Linux 7.1-rc2+
with kexec results in the warning below:

      [    0.000000] Linux version 7.1.0-rc2+ (x@b) (gcc (Ubuntu 11.2.0-7ubuntu2) 11.2.0, GNU ld (GNU Binutils for Ubuntu) 2.37) #3 SMP PREEMPT Wed May  6 08:50:5
      […]
      [    0.000000] Hardware name: 8335-GCA POWER8 (raw) 0x4d0200 opal:skiboot-5.4.8-5787ad3 PowerNV
      […]
      [    1.593760] NET: Registered PF_UNIX/PF_LOCAL protocol family
      [    1.593859] pci 0021:0d:00.0: enabling device (0140 -> 0142)
      [    1.627080] pci 0021:0d:00.0: xHCI HW did not halt within 32000 usec status = 0x0
      [    1.627094] pci 0021:0d:00.0: quirk_usb_early_handoff+0x0/0x300 took 32465 usecs
      [    1.627123] PCI: CLS 0 bytes, default 128

Does it work any better if kexecing other kernel versions?

No, the problem goes as far back as 5.17-rc7. (I didn’t try anything 
before.)

What if you increase XHCI_MAX_HALT_USEC by 10* or 100* ?

I have to test this.

Does the controller work normally after this warning?

It does not look like it. In the log attached to my report, later on 
there is:

     [    1.739374] xhci_hcd 0021:0d:00.0: xHCI Host Controller
     [    1.739431] xhci_hcd 0021:0d:00.0: new USB bus registered, 
assigned bus number 1
     [    1.794727] Freeing initrd memory: 52928K
     [    1.801984] xhci_hcd 0021:0d:00.0: Host halt failed, -110
     [    1.801988] xhci_hcd 0021:0d:00.0: can't setup: -110
     [    1.802137] xhci_hcd 0021:0d:00.0: USB bus 1 deregistered
     [    1.802154] xhci_hcd 0021:0d:00.0: init 0021:0d:00.0 fail, -110
     [    1.802250] xhci_hcd 0021:0d:00.0: probe with driver xhci_hcd 
failed with error -110

`lsusb` also does not list the device. But I need to check on hardware.


Kind regards,

Paul


PS: Claude Sonnet 4.6 cooked up the attached patch, which does *not* 
help though, but does get it to the return code 0x10, which Claude 
replied to with:

● The status change 0x0 → 0x10 is meaningful: 0x10 is PCD (Port Change Detect, bit 4),
  HCHalted=0. The old-kernel reset (from our commit) did take effect …

Please excuse, if I attach/cite hallucinations.