usb_drv error -92 for RPi | Genode 18.05 with Fiasco.OC 79

Alexander Weidinger alexander.weidinger at
Sun Apr 14 17:39:47 CEST 2019

Hello Tomasz,

On Sat, Apr 13, 2019 at 06:40:59PM +0200, Tomasz Gajewski wrote:

> Alexander, I don't know if you are still interested in this but if you
> check if my findings help I would definitely like to know about this.
First of all, thanks for the amazing reversing work and explanation!
I only silently followed the discussions on GitHub about the RPi,
since I didn't have any findings to contribute.

> I did not check networking yet but eliminated -92 errors for keyboard
> and mouse.
I integrated your "brutal" fix and did a short test with a RPi 3.
Networking seems to work and the error seems to be eliminated.

> During my attempts I ported this new driver and it did not help so
> probably fixing dma can help on previous versions of the driver too.
I used it in conjunction with the dwc driver,
so your hypothesis seems to be correct.

Best regards,
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