linux-kernel - Re: [PATCH v2 1/2] soc: fsl: dpio: cleanup the cpu array on dpaa2_io

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Message-ID: <CADRPPNR43D4jhcdMigUz3-CrNp4VEhUJmsZXofha2kY+gkLsoQ@mail.gmail.com>
Date:   Wed, 5 Dec 2018 11:51:02 -0600
From:   Li Yang <leoyang.li@....com>
To:     ioana.ciornei@....com
Cc:     Roy Pledge <roy.pledge@....com>, youri.querry_1@....com,
        lkml <linux-kernel@...r.kernel.org>,
        "moderated list:ARM/FREESCALE IMX / MXC ARM ARCHITECTURE" 
        <linux-arm-kernel@...ts.infradead.org>,
        Ioana Ciocoi Radulescu <ruxandra.radulescu@....com>,
        Horia Geanta <horia.geanta@....com>
Subject: Re: [PATCH v2 1/2] soc: fsl: dpio: cleanup the cpu array on dpaa2_io_down

On Tue, Dec 4, 2018 at 5:21 AM Ioana Ciornei <ioana.ciornei@....com> wrote:
>
> The dpio_by_cpu array should not contain a reference to a freed dpaa2_io
> object. This patch adds the necessary cleanup in dpaa2_io_down.

Applied.  Thanks.

>
> Signed-off-by: Ioana Ciornei <ioana.ciornei@....com>
> ---
> Changes in v2:
>   - none
>
>  drivers/soc/fsl/dpio/dpio-service.c | 5 +++++
>  1 file changed, 5 insertions(+)
>
> diff --git a/drivers/soc/fsl/dpio/dpio-service.c b/drivers/soc/fsl/dpio/dpio-service.c
> index 9b17f72..21c3e32 100644
> --- a/drivers/soc/fsl/dpio/dpio-service.c
> +++ b/drivers/soc/fsl/dpio/dpio-service.c
> @@ -160,6 +160,11 @@ struct dpaa2_io *dpaa2_io_create(const struct dpaa2_io_desc *desc)
>   */
>  void dpaa2_io_down(struct dpaa2_io *d)
>  {
> +       spin_lock(&dpio_list_lock);
> +       dpio_by_cpu[d->dpio_desc.cpu] = NULL;
> +       list_del(&d->node);
> +       spin_unlock(&dpio_list_lock);
> +
>         kfree(d);
>  }
>
> --
> 1.9.1
>