linux-kernel - Re: Status on hid xppen patch

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Date:   Mon, 16 May 2022 13:21:59 +0200
From:   José Expósito <jose.exposito89@...il.com>
To:     Stefan Berzl <stefanberzl@...il.com>
Cc:     jikos@...nel.org, benjamin.tissoires@...hat.com, spbnick@...il.com,
        linux-input@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: Status on hid xppen patch

On Mon, May 16, 2022 at 12:45:48PM +0200, Stefan Berzl wrote:
> Yo José,
> 
> > Also, I don't know if you have seen this error after connecting the
> > tablet:
> > 
> >   xhci_hcd 0000:2a:00.3: WARN urb submitted to disabled ep
> >   usb 3-2: reset full-speed USB device number 6 using xhci_hcd
> >   usb 3-2: reset full-speed USB device number 6 using xhci_hcd
> >   [...]
> > 
> > It happens with the Deco Mini 4, even when using the hid-generic
> > driver. I need to rebase my patches on 5.19 and test again, just to
> > make sure the problem is not somewhere else.
> 
> Can't say I have seen it. The only thing I can think of is that I was
> using the async urb functions and that delay did something about it.

Thanks, I'll give it a try. I hope is not some kind of time based
condition.

By the way, I only see the error when the tablet is connected. If I run
"usbhid-dump" or unload and load the driver, it works as expected.
I don't know if this could be related to the driver failing to process
the response to the magic data... Investigating.

Thanks,
Jose