[Bug 218486] New: Linux warning `usb: port power management may be unreliable` on Dell OptiPlex 3620

[bugzilla-daemon@kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=218486

            Bug ID: 218486
           Summary: Linux warning `usb: port power management may be
                    unreliable` on Dell OptiPlex 3620
           Product: Drivers
           Version: 2.5
          Hardware: All
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P3
         Component: USB
          Assignee: drivers_usb@kernel-bugs.kernel.org
          Reporter: pmenzel+bugzilla.kernel.org@molgen.mpg.de
        Regression: No

Created attachment 305859
  --> https://bugzilla.kernel.org/attachment.cgi?id=305859&action=edit
Linux 6.6.12 messages (output of `dmesg`) with system firmware 1.28.0

On the Dell OptiPlex 3620 with at least system firmware version 1.25.0 and
1.28.0, Linux warns:

    $ dmesg | grep -e "DMI:" -e "Linux version" -e microcode
    [    0.000000] Linux version 6.6.12.mx64.461
(root@theinternet.molgen.mpg.de) (gcc (GCC) 12.3.0, GNU ld (GNU Binutils) 2.41)
#1 SMP PREEMPT_DYNAMIC Thu Jan 18 10:47:08 CET 2024
    [    0.000000] DMI: Dell Inc. Precision Tower 3620/0MWYPT, BIOS 2.28.0
12/13/2023
    $ grep microcode /proc/cpuinfo | uniq
    microcode   : 0xf4
    $ usb-devices

    T:  Bus=01 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#=  1 Spd=480 MxCh=16
    D:  Ver= 2.00 Cls=09(hub  ) Sub=00 Prot=01 MxPS=64 #Cfgs=  1
    P:  Vendor=1d6b ProdID=0002 Rev=06.06
    S:  Manufacturer=Linux 6.6.12.mx64.461 xhci-hcd
    S:  Product=xHCI Host Controller
    S:  SerialNumber=0000:00:14.0
    C:  #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr=0mA
    I:  If#=0x0 Alt= 0 #EPs= 1 Cls=09(hub  ) Sub=00 Prot=00 Driver=hub

    T:  Bus=01 Lev=01 Prnt=01 Port=05 Cnt=01 Dev#=  3 Spd=1.5 MxCh= 0
    D:  Ver= 2.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS= 8 #Cfgs=  1
    P:  Vendor=413c ProdID=2113 Rev=33.08
    S:  Product=Dell KB216 Wired Keyboard
    C:  #Ifs= 2 Cfg#= 1 Atr=a0 MxPwr=100mA
    I:  If#=0x0 Alt= 0 #EPs= 1 Cls=03(HID  ) Sub=01 Prot=01 Driver=usbhid
    I:  If#=0x1 Alt= 0 #EPs= 1 Cls=03(HID  ) Sub=00 Prot=00 Driver=usbhid

    T:  Bus=01 Lev=01 Prnt=01 Port=08 Cnt=02 Dev#=  5 Spd=12  MxCh= 0
    D:  Ver= 2.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS= 8 #Cfgs=  1
    P:  Vendor=27b8 ProdID=01ed Rev=00.02
    S:  Manufacturer=ThingM
    S:  Product=blink(1) mk2
    S:  SerialNumber=20010D87
    C:  #Ifs= 1 Cfg#= 1 Atr=80 MxPwr=120mA
    I:  If#=0x0 Alt= 0 #EPs= 2 Cls=03(HID  ) Sub=00 Prot=00 Driver=usbfs

    T:  Bus=02 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#=  1 Spd=5000 MxCh=10
    D:  Ver= 3.00 Cls=09(hub  ) Sub=00 Prot=03 MxPS= 9 #Cfgs=  1
    P:  Vendor=1d6b ProdID=0003 Rev=06.06
    S:  Manufacturer=Linux 6.6.12.mx64.461 xhci-hcd
    S:  Product=xHCI Host Controller
    S:  SerialNumber=0000:00:14.0
    C:  #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr=0mA
    I:  If#=0x0 Alt= 0 #EPs= 1 Cls=09(hub  ) Sub=00 Prot=00 Driver=hub

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