[Bug 213839] New: XHCI 7 port usb hub does not work correctly

[bugzilla-daemon@bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=213839

            Bug ID: 213839
           Summary: XHCI 7 port usb hub does not work correctly
           Product: Drivers
           Version: 2.5
    Kernel Version: 5.13.4
          Hardware: All
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: USB
          Assignee: drivers_usb@kernel-bugs.kernel.org
          Reporter: tmezzadra@gmail.com
        Regression: No

I got an off brand 7-port usb 2.0 which internally has two ICs.

first IC connected to the host's usb port exposes 3 USB ports. its 4th usb port
has a second identical IC connected which exposes 4 USB ports making it a total
of 7 USB 2.0 ports available.

Bus 002 Device 065: ID 0a05:7211 Unknown Manufacturer hub
Bus 002 Device 064: ID 0a05:7211 Unknown Manufacturer hub

As they appear from lsusb

the problem is that the first chip works correctly (first 3 USB ports connected
to it work). But as soon as I connect a usb device on any of the ports from the
second chip. i get the following problems in dmesg:

[ 2215.717828] usb 2-1.1: new full-speed USB device number 29 using xhci_hcd
[ 2215.808680] usb 2-1.1: New USB device found, idVendor=0a05, idProduct=7211,
bcdDevice= 1.00
[ 2215.808685] usb 2-1.1: New USB device strings: Mfr=0, Product=1,
SerialNumber=0
[ 2215.808688] usb 2-1.1: Product: USB2.0 HUB
[ 2215.809333] hub 2-1.1:1.0: USB hub found
[ 2215.809426] hub 2-1.1:1.0: 4 ports detected
[ 2216.158062] usb 2-1.1: USB disconnect, device number 29
[ 2216.174608] usb 2-1.1-port3: attempt power cycle
[ 2216.561173] usb 2-1.1: new full-speed USB device number 34 using xhci_hcd
[ 2216.652346] usb 2-1.1: New USB device found, idVendor=0a05, idProduct=7211,
bcdDevice= 1.00
[ 2216.652359] usb 2-1.1: New USB device strings: Mfr=0, Product=1,
SerialNumber=0
[ 2216.652365] usb 2-1.1: Product: USB2.0 HUB
[ 2216.654327] hub 2-1.1:1.0: USB hub found
[ 2216.654480] hub 2-1.1:1.0: 4 ports detected
[ 2217.001529] usb 2-1.1: USB disconnect, device number 34
[ 2217.017975] usb 2-1.1-port3: attempt power cycle
[ 2217.404536] usb 2-1.1: new full-speed USB device number 39 using xhci_hcd
[ 2217.495411] usb 2-1.1: New USB device found, idVendor=0a05, idProduct=7211,
bcdDevice= 1.00
[ 2217.495417] usb 2-1.1: New USB device strings: Mfr=0, Product=1,
SerialNumber=0
[ 2217.495419] usb 2-1.1: Product: USB2.0 HUB
[ 2217.496120] hub 2-1.1:1.0: USB hub found
[ 2217.496221] hub 2-1.1:1.0: 4 ports detected
[ 2217.844888] usb 2-1.1: USB disconnect, device number 39
[ 2217.861345] usb 2-1.1-port3: attempt power cycle



and so on....


This same device at a Windows computer works correctly.

Ideas?

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