Hi Doug On Mon, Dec 11, 2023 at 11:00 PM Doug Anderson <dianders@xxxxxxxxxxxx> wrote: > > Hi, > > On Mon, Dec 11, 2023 at 1:42 PM Michael Nazzareno Trimarchi > <michael@xxxxxxxxxxxxxxxxxxxx> wrote: > > > > > 1. init_kgdboc() runs and registers the singleton kgdb "platform driver". > > > > > > 2. The platform driver's probe function, kgdboc_probe(), runs and > > > checks to see if the console is ready by looking at the return value > > > of configure_kgdboc(). If it's ready then we're good to go. If it's > > > not ready then we defer. > > > > > > So I think the bug here is that somehow the console looks "ready" > > > (because tty_find_polling_driver() can find it) but it isn't actually > > > ready yet (because it crashes). That's what you need to fix. > > > > > > > The polling driver look for uart and uart8250_core is registered and 4 fake uart > > are there but there are not still replaced by platform driver that can > > come later. > > The try_polling find it but it's the isa-8250 driver. It means that > > add_uart 8250 is > > not still happen > > The 8250 driver is always a maze, so you might need to do a bunch of > digging. ...but it sure sounds like the console shouldn't be > registered until the correct ops are in place. That either means > getting the ops put in place earlier or deferring when the console is > registered... > Your point is pretty clear and my initial idea was to find a real fix. This come to avoid breaking existing setup but anyway I will dig in it more Michael > -Doug -- Michael Nazzareno Trimarchi Co-Founder & Chief Executive Officer M. +39 347 913 2170 michael@xxxxxxxxxxxxxxxxxxxx __________________________________ Amarula Solutions BV Joop Geesinkweg 125, 1114 AB, Amsterdam, NL T. +31 (0)85 111 9172 info@xxxxxxxxxxxxxxxxxxxx www.amarulasolutions.com
