[PATCH v7 2/9] drm/panic: Add a drm panic handler

[Daniel Vetter]

On Thu, Jan 04, 2024 at 05:00:46PM +0100, Jocelyn Falempe wrote:
> +/**
> + * drm_panic_init() - Initialize drm-panic subsystem
> + *
> + * register the panic notifier
> + */
> +void drm_panic_init(void)
> +{
> +	atomic_notifier_chain_register(&panic_notifier_list,
> +				       &drm_panic_notifier);

Ok I've found another one after checking core panic code. This is the
wrong hook, we want to be a sttruct kmsg_dumper and use
kmsg_dump_register. And again once for each drm_panic_device so that we
can rely on core locking, as I've explained in the other reply.

Also because it trashes buffers from userspace I think by default we want
to only dump on panic, so KMS_DUMP_PANIC.
-Sima
-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch