[Bug 219111] Xone:23C mixer not recognized as a 2in/2out device

[bugzilla-daemon@kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=219111

--- Comment #41 from CH (com+bugzilla-kernel@c-henry.fr) ---
> The idea is that you start with old_scheme_first set to N, plug in the device, check that bNumConfigurations is 1 in the "lsusb -v" output, set old_scheme_first to Y, and then use usbreset to reset the device.  If bNumConfigurations changes to 2, you'll know that the reset caused the device to go into its other mode.

Unhopefully, that doesn't seem to work. I really need to turn off/turn on the
device to get the proper `bConfigurationValue`s

```
# echo N >/sys/module/usbcore/parameters/old_scheme_first
# cat /sys/module/usbcore/parameters/old_scheme_first
N
# lsusb -v -d 22f0:0008~ | grep bConfiguration
    bConfigurationValue     1
# echo Y >/sys/module/usbcore/parameters/old_scheme_first
# cat /sys/module/usbcore/parameters/old_scheme_first
Y
# usbreset 22f0:0008
Resetting Xone:23C ... ok
# lsusb -v -d 22f0:0008~ | grep bConfiguration
    bConfigurationValue     1
## Here, I unplug the device without restarting it
# lsusb -v -d 22f0:0008~ | grep bConfiguration
    bConfigurationValue     1
## Here, I restart the device without unplugging it
# lsusb -v -d 22f0:0008~ | grep bConfiguration
    bConfigurationValue     1
    bConfigurationValue     2
```

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