linux-kernel - Re: [PATCH] Input: serio

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Message-ID: <20150928001808.GA17818@dtor-ws>
Date:	Sun, 27 Sep 2015 17:18:08 -0700
From:	Dmitry Torokhov <dmitry.torokhov@...il.com>
To:	Sudip Mukherjee <sudipm.mukherjee@...il.com>
Cc:	linux-kernel@...r.kernel.org, linux-input@...r.kernel.org,
	stable@...r.kernel.org
Subject: Re: [PATCH] Input: serio - fix blocking of parport

On Sat, Sep 26, 2015 at 06:53:21PM +0530, Sudip Mukherjee wrote:
> If parkbd_allocate_serio() fails to allocate memory we are releasing the
> parport but we missed unregistering the device. As a result this device
> with exclusive access to that parport remains registered. And no other
> device will be able to use that parport even though this driver has
> failed to load.
> 
> Cc: <stable@...r.kernel.org> # 2.6.32+
> Signed-off-by: Sudip Mukherjee <sudip@...torindia.org>

Applied, but I dropped stable annotation - since noone complained about
this and the issue is in error path that is unlikely anyway, I do not
think we need to bother stable guys with it.

Thanks!

> ---
> 
> Faced this problem while creating the patch series for input to use
> parallel port device model.
> 
>  drivers/input/serio/parkbd.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/input/serio/parkbd.c b/drivers/input/serio/parkbd.c
> index 26b4593..1e8cd6f 100644
> --- a/drivers/input/serio/parkbd.c
> +++ b/drivers/input/serio/parkbd.c
> @@ -194,6 +194,7 @@ static int __init parkbd_init(void)
>  	parkbd_port = parkbd_allocate_serio();
>  	if (!parkbd_port) {
>  		parport_release(parkbd_dev);
> +		parport_unregister_device(parkbd_dev);
>  		return -ENOMEM;
>  	}
>  
> -- 
> 1.9.1
> 

-- 
Dmitry
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