linux-kernel - Re: [RFC PATCH v5 1/1] fpga: add an owner and use it to take the low-level module's refcount

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Date: Mon, 4 Mar 2024 21:49:12 +0800
From: Xu Yilun <yilun.xu@...ux.intel.com>
To: Marco Pagani <marpagan@...hat.com>
Cc: Moritz Fischer <mdf@...nel.org>, Wu Hao <hao.wu@...el.com>,
	Xu Yilun <yilun.xu@...el.com>, Tom Rix <trix@...hat.com>,
	Jonathan Corbet <corbet@....net>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Alan Tull <atull@...nsource.altera.com>,
	linux-kernel@...r.kernel.org, linux-doc@...r.kernel.org,
	linux-fpga@...r.kernel.org
Subject: Re: [RFC PATCH v5 1/1] fpga: add an owner and use it to take the
 low-level module's refcount

> Just to be sure that I understood correctly, you want to split the
> changes into two patches, like:
> 
> a) add module owner to the manager struct and take it in
> __fpga_mgr_get(); move put_device() from __fpga_mgr_get() to
> fpga_mgr_get() and of_fpga_mgr_get().
> 
> b) add the mutex and the unregistered flag for protection against races.
> 
> So that (b) can be reverted if try_module_get_safe() will be accepted?

Yes, that's what I mean.

> 
> > [...]
> 
> Thanks,
> Marco
> 
>