[Intel-gfx] [RFC] i915: make the probe asynchronous

[Feng Tang]

On Tue, Jun 26, 2018 at 10:29:16AM +0800, Feng Tang wrote:
> On Mon, Jun 25, 2018 at 05:36:32PM +0200, Daniel Vetter wrote:
 
> Hi Daneil/Jani/Takashi,
> 
> When I was testing this patch from Takashi, I further checked the kernel
> module code, and found that: we may need NOT to add any new codes to
> prepare for i915's async probe feature!
> 
> Say when i915 module is being loader due to HDA's request_module() call,
> in the callchain, do_init_module() has such code:
> 
>     if (!mod->async_probe_requested && (current->flags & PF_USED_ASYNC))
>                 async_synchronize_full();
> 
> This will garantee the asynced probe is done before it returns.
> 
> I have just tested and this seems to be enough. If I am not wrong, then
> we can take the i915 async patch directly. What do you think?

Ping for comments, thanks!

- Feng