Re: [PATCH v4 2/3] net/9p/usbg: Add new usb gadget function transport

[Michael Grzeschik]

Hi

On Fri, May 10, 2024 at 04:11:27PM +0200, Andrzej Pietrasiewicz wrote:
> W dniu 10.05.2024 o 12:11, Michael Grzeschik pisze:
> > On Fri, May 10, 2024 at 11:25:47AM +0200, Andrzej Pietrasiewicz wrote:
> > > Hi Michael,
> > >
> > > W dniu 30.04.2024 o 01:33, Michael Grzeschik pisze:
> > > > Add the new gadget function for 9pfs transport. This function is
> > > > defining an simple 9pfs transport interface that consists of one in and
> > > > one out endpoint. The endpoints transmit and receive the 9pfs protocol
> > > > payload when mounting a 9p filesystem over usb.
> > > >
> > > > Signed-off-by: Michael Grzeschik <m.grzeschik@xxxxxxxxxxxxxx>
> > > >
> > > > ---
> > > > v3 -> v4:
> > > >   - implemented conn_cancel
> > >
> > > I tried this scenario:
> > >
> > > 1) run all the components and have 9pfs up and running
> > > 2) stop the forwarder
> > > 3) umount -f at the gadget side - this indeed succeeds now in v4
> > > 4) start the forwarder again
> > > 5) mount at the gadget side - this hangs.
> > >
> > > Did this scenario work for you?
> >
> > I actually tested this exact scenario. So this is
> > suprising. I will try this again just to be sure
> > that I did send the latest version.
> >
> > My latest testsetup included the dummy_hcd. Did you test on real hardware?
>
> Yes, I did.

I just also tested this again on real hardware. With the imx6 chipidea
udc I indeed see that this is stuck after the first round of mount and
remount. With the musb core on the beaglebone this seems to be fine.

While debugging this I also ran into some shutdown issues and lockdep
issues I see because the complete handler is possible to be resumed
immedeatly on musb, which is odd. However I fixed/fix them and send an
v5 afterwards.

Regarding the hang on the imx6, which hardware did you test this on?

Michael

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