linux-kernel - Re: [PATCH] INPUT: fix hidinput_connect ignoring retval from input_register

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Date:	Mon, 29 Oct 2007 11:33:19 -0400
From:	"Dmitry Torokhov" <dmitry.torokhov@...il.com>
To:	"Dirk Hohndel" <hohndel@...ux.intel.com>
Cc:	"Jeff Garzik" <jeff@...zik.org>, "Jiri Kosina" <jikos@...os.cz>,
	linux-input@...ey.karlin.mff.cuni.cz, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] INPUT: fix hidinput_connect ignoring retval from input_register_device

On 10/29/07, Dirk Hohndel <hohndel@...ux.intel.com> wrote:
>
> Actually, the more I look at the code that bails when it runs out of memory,
> the more I wonder about that.
>
>        hidinput = kzalloc(sizeof(*hidinput), GFP_KERNEL);
>        input_dev = input_allocate_device();
>        if (!hidinput || !input_dev) {
>                kfree(hidinput);
>                input_free_device(input_dev);
>
> This either passes a NULL pointer to kfree or to input_free_device. That's
> not nice.
>

No, that's allright. input_free_device() takes after kfree() so that
it safe to call it with NULL pointer.

-- 
Dmitry
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