Bug in USB gadget causes fail of more than one USB device connecting to AST2500 USB HVUB

[Konstantin Klubnichkin]

Hello!

I've found an issue with the USB gadget driver: if virtual media is connected to USB hub, then obmc-ikvm fails due to inability to set up USB HID device:

Mar 03 19:20:31 bmc kernel: Error: Driver 'configfs-gadget' is already registered, aborting...
Mar 03 19:20:31 bmc kernel: UDC core: obmc_hid: driver registration failed: -16
Mar 03 19:20:31 bmc obmc-ikvm[455]: 03/03/2023 19:20:31 0 other clients
Mar 03 19:20:31 bmc obmc-ikvm[455]: Failed to connect HID gadget

I've found that only one device can be connected despite the VHUB has 5 ports.

Further googling lead me to this topic: https://lore.kernel.org/lkml/[e-mail]/
Applying the patch fixed the problem.

[Thang Q. Nguyen]

This should be fixed on the latest openbmc which uses linux from dev-6.1 branch that includes 96abcf7.

[Joel Stanley]

This should be resolved in dev-6.1. Please re-open if you find otherwise.