Re: Usb midi device does not work on wake

[Greg KH <gregkh@linuxfoundation.org>]

On Wed, Jan 29, 2020 at 03:47:29PM +0000, Richard Dodd wrote:
> On Mon, Jan 13, 2020 at 9:40 AM Oliver Neukum <oneukum@suse.com> wrote:
> >
> > Am Sonntag, den 12.01.2020, 12:06 +0000 schrieb Richard Dodd:
> > > Hello
> > >
> > > I've got a Novation midi-over-usb device (LaunchControl XL) that works
> > > correctly on boot, but remains in power-off mode when waking from
> > > sleep.
> > >
> > > I suspect that there is some sort of initialisation that needs to be
> > > applied. Could anyone suggest possible causes, or point me in the
> > > direction of the relevant source code. I found `sound/usb/quirks.c`,
> > > which seems to be the place to handle this kind of thing, but there is
> > > no mention of my device anywhere in the source tree at present
> > > (1235:0061).
> >
> > Hi,
> >
> > some devices need an additional reset. They have the quirk RESET_RESUME
> > in that file. Try adding your device to that list and recompile your
> > kernel.
> >
> >         HTH
> >                 Oliver
> >
> 
> Hi
> 
> I found the list you are talking about in `drivers/usb/core/quirks.c`,
> and when I patched it, my device correctly woke up after suspend. :)
> 
> Can I upstream the patch by posting it here. The patch is attached to
> this email.

Can you please resend this in the format described in the documentation
so that we can apply it to the tree?

thanks,

greg k-h