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Date:   Fri, 25 Jun 2021 13:18:23 +0200
From:   Greg KH <gregkh@linuxfoundation.org>
To:     Laurentiu-Cristian Duca <laurentiu.duca@gmail.com>
Cc:     linux-usb@vger.kernel.org
Subject: Re: Question about usb3 host code
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On Fri, Jun 25, 2021 at 01:46:09PM +0300, Laurentiu-Cristian Duca wrote:
> Hello linux-usb community,
> 
>   I am new to linux-usb code and I hope that my question is not silly.
> I am interested in real-time usb.
> 
>   I know that on USB3, the gadget can initiate transactions

It can?  What do you mean by this exactly?

USB works in the "host asks a gadget if it has data" method.  The gadget
can not talk to the host unless it is asked.

thanks,

greg k-h