07.11.2021 20:08, Guenter Roeck пишет: > On 11/7/21 8:53 AM, Dmitry Osipenko wrote: >> 06.11.2021 23:54, Jonathan Neuschäfer пишет: >>> Hi, >>> >>> On Thu, Oct 28, 2021 at 12:16:57AM +0300, Dmitry Osipenko wrote: >>>> Use devm_register_power_handler() that replaces global pm_power_off >>>> variable and allows to register multiple power-off handlers. It also >>>> provides restart-handler support, i.e. all in one API. >>>> >>>> Signed-off-by: Dmitry Osipenko <digetx@xxxxxxxxx> >>>> --- >>> >>> When I boot with (most of) this patchset applied, I get the warning at >>> kernel/reboot.c:187: >>> >>> /* >>> * Handler must have unique priority. Otherwise call order is >>> * determined by registration order, which is unreliable. >>> */ >>> WARN_ON(!atomic_notifier_has_unique_priority(&restart_handler_list, >>> nb)); >>> >>> As the NTXEC driver doesn't specify a priority, I think this is an issue >>> to be fixed elsewhere. >>> >>> Other than that, it works and looks good, as far as I can tell. >>> >>> >>> For this patch: >>> >>> Reviewed-by: Jonathan Neuschäfer <j.neuschaefer@xxxxxxx> >>> Tested-by: Jonathan Neuschäfer <j.neuschaefer@xxxxxxx> >> >> Thank you. You have conflicting restart handlers, apparently NTXEC >> driver should have higher priority than the watchdog driver. It should >> be a common problem for the watchdog drivers, I will lower watchdog's >> default priority to fix it. >> > > The watchdog subsystem already uses "0" as default priority, which was > intended as priority of last resort for restart handlers. I do not see > a reason to change that. Right, I meant that watchdog drivers which use restart handler set the level to the default 128 [1]. Although, maybe it's a problem only for i.MX drivers in practice, I'll take a closer look at the other drivers. [1] https://elixir.bootlin.com/linux/latest/source/drivers/watchdog/imx2_wdt.c#L318
