Subject: Re: [patch net-next] devlink: don't take instance lock for nested handle put

From: Jakub Kicinski <[email-masked]>
Date: Fri, 6 Oct 2023 15:14:46 -0700

On Fri, 6 Oct 2023 19:07:34 +0200 Jiri Pirko wrote:
> >The user creates a port on an instance A, which spawns instance B.
> >Instance A links instance B to itself.
> >Instance A cannot disappear before instance B disappears.  
> 
> It can. mlx5 port sf removal is very nice example of that. It just tells
> the FW to remove the sf and returns. The actual SF removal is spawned
> after that when processing FW events.

Isn't the PF driver processing the "FW events"? A is PF here, and B 
is SF, are you saying that the PF devlink instance can be completely
removed (not just unregistered, freed) before the SF instance is
unregistered?