linux-kernel - Re: [PATCH 1/7] Input: synaptics-rmi4: Increment the refcount of the transport dev's of

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <20160615092426.GS24234@mail.corp.redhat.com>
Date:	Wed, 15 Jun 2016 11:24:26 +0200
From:	Benjamin Tissoires <benjamin.tissoires@...hat.com>
To:	Andrew Duggan <aduggan@...aptics.com>
Cc:	linux-input@...r.kernel.org, linux-kernel@...r.kernel.org,
	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	Linus Walleij <linus.walleij@...aro.org>,
	Jiri Kosina <jikos@...nel.org>,
	Vincent Huang <vincent.huang@...synaptics.com>,
	Nick Dyer <nick.dyer@...ev.co.uk>
Subject: Re: [PATCH 1/7] Input: synaptics-rmi4: Increment the refcount of the
 transport dev's of_node

On Jun 03 2016 or thereabouts, Andrew Duggan wrote:
> Increment the refcount for the transport device's of_node before calling
> of_find_node_by_name(). Since of_find_node_by_name() assumes the refcount
> was incremented by the caller and calls of_node_put() when it is done.

That is some weird API. I guess it must be used with:
of_node = of_find_node_by_name(of_node, of_name);

Anyway:
Reviewed-by: Benjamin Tissoires <benjamin.tissoires@...hat.com>

Cheers,
Benjamin

> 
> Signed-off-by: Andrew Duggan <aduggan@...aptics.com>
> ---
>  drivers/input/rmi4/rmi_bus.c | 5 +++--
>  1 file changed, 3 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/input/rmi4/rmi_bus.c b/drivers/input/rmi4/rmi_bus.c
> index b368b05..55b5336 100644
> --- a/drivers/input/rmi4/rmi_bus.c
> +++ b/drivers/input/rmi4/rmi_bus.c
> @@ -157,11 +157,12 @@ static int rmi_function_match(struct device *dev, struct device_driver *drv)
>  static void rmi_function_of_probe(struct rmi_function *fn)
>  {
>  	char of_name[9];
> +	struct device_node *node = fn->rmi_dev->xport->dev->of_node;
>  
>  	snprintf(of_name, sizeof(of_name), "rmi4-f%02x",
>  		fn->fd.function_number);
> -	fn->dev.of_node = of_find_node_by_name(
> -				fn->rmi_dev->xport->dev->of_node, of_name);
> +	of_node_get(node);
> +	fn->dev.of_node = of_find_node_by_name(node, of_name);
>  }
>  #else
>  static inline void rmi_function_of_probe(struct rmi_function *fn)
> -- 
> 2.5.0
>