linux-kernel - Re: [PATCH 2/2] [ARM] am300epd: fix resource leak in am300_init_gpio

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Date:	Thu, 17 Mar 2011 23:06:51 +0800
From:	Eric Miao <eric.y.miao@...il.com>
To:	Axel Lin <axel.lin@...il.com>
Cc:	linux-kernel@...r.kernel.org,
	Jaya Kumar <jayakumar.lkml@...il.com>,
	Russell King <linux@....linux.org.uk>,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH 2/2] [ARM] am300epd: fix resource leak in
 am300_init_gpio_regs error path

Applied.

On Mon, Mar 7, 2011 at 1:56 PM, Axel Lin <axel.lin@...il.com> wrote:
> If gpio_request fails when i > 0, gpios[0] is not freed in current
> implementation.
>
> Signed-off-by: Axel Lin <axel.lin@...il.com>
> ---
>  arch/arm/mach-pxa/am300epd.c |   13 +++++++------
>  1 files changed, 7 insertions(+), 6 deletions(-)
>
> diff --git a/arch/arm/mach-pxa/am300epd.c b/arch/arm/mach-pxa/am300epd.c
> index 993d75e..fa8bad2 100644
> --- a/arch/arm/mach-pxa/am300epd.c
> +++ b/arch/arm/mach-pxa/am300epd.c
> @@ -125,10 +125,7 @@ static int am300_init_gpio_regs(struct broadsheetfb_par *par)
>                if (err) {
>                        dev_err(&am300_device->dev, "failed requesting "
>                                "gpio %d, err=%d\n", i, err);
> -                       while (i >= DB0_GPIO_PIN)
> -                               gpio_free(i--);
> -                       i = ARRAY_SIZE(gpios) - 1;
> -                       goto err_req_gpio;
> +                       goto err_req_gpio2;
>                }
>        }
>
> @@ -159,9 +156,13 @@ static int am300_init_gpio_regs(struct broadsheetfb_par *par)
>
>        return 0;
>
> +err_req_gpio2:
> +       while (--i >= DB0_GPIO_PIN)
> +               gpio_free(i);
> +       i = ARRAY_SIZE(gpios);
>  err_req_gpio:
> -       while (i > 0)
> -               gpio_free(gpios[i--]);
> +       while (--i >= 0)
> +               gpio_free(gpios[i]);
>
>        return err;
>  }
> --
> 1.7.2
>
>
>
>