linux-kernel - Re: i2c: core: decrease reference count of device node in i2c_unregister

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Date:   Tue, 16 Jan 2018 00:02:09 +0100
From:   Wolfram Sang <wsa@...-dreams.de>
To:     Lixin Wang <alan.1.wang@...ia-sbell.com>
Cc:     linux-i2c@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: i2c: core: decrease reference count of device node in
 i2c_unregister_device

On Mon, Nov 27, 2017 at 03:06:55PM +0800, Lixin Wang wrote:
> Reference count of device node was increased in of_i2c_register_device,
> but without decreasing it in i2c_unregister_device. Then the dynamically
> added device node will never be released.
> Fix this by adding the of_node_put.
> 
> Signed-off-by: Lixin Wang <alan.1.wang@...ia-sbell.com>

Yes you are right! In my previous review, I mixed up
of_i2c_register_devices (with plural 's') with of_i2c_register_device
(without plural 's'). I could now verify your findings by rebinding an
adapter which had DT bindings for clients attached. With every rebind
cycle, the refcount for the client increased.

I did some rebasing, because your patch didn't apply to a v4.15
codebase. Now, applied to for-current, thanks!

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