am335x: 5.18.x: system stalling

[Tony Lindgren]

* Yegor Yefremov <yegorslists at googlemail.com> [220526 05:45]:
> On Tue, May 24, 2022 at 4:19 PM Tony Lindgren <tony at atomide.com> wrote:
> > Maybe also try with CONFIG_MUSB_PIO_ONLY=y to see if it makes things
> > better or worse :)
> 
> PIO is always the last resort :-) And now it proves it again. With
> PIO_ONLY the system doesn't stall.

OK great :) So it has something to do with drivers/dma/ti/cppi41.c, or
with drivers/usb/musb/cppi_dma.c or whatever the dma for am335x here
is. Or maybe there's something using stack for buffers being passed to
dma again that breaks with vmap stack.

Regards,

Tony