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Date: Fri, 6 Oct 2023 15:14:46 -0700
From: Jakub Kicinski <kuba@kernel.org>
To: Jiri Pirko <jiri@resnulli.us>
Cc: netdev@vger.kernel.org, pabeni@redhat.com, davem@davemloft.net,
 edumazet@google.com, gal@nvidia.com
Subject: Re: [patch net-next] devlink: don't take instance lock for nested
 handle put
Message-ID: <20231006151446.491b5965@kernel.org>
In-Reply-To: <ZSA+1qA6gNVOKP67@nanopsycho>
References: <20231003074349.1435667-1-jiri@resnulli.us>
	<20231005183029.32987349@kernel.org>
	<ZR+1mc/BEDjNQy9A@nanopsycho>
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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?