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References: <20190904141857.196103-1-weiyongjun1@huawei.com>
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From:   Karol Herbst <kherbst@redhat.com>
Date:   Thu, 5 Sep 2019 11:11:49 +0200
Message-ID: <CACO55tsJt2Z-EQBpPw1=yq_jya2kJ5u5xs_xg=nhB8ZHwhjCoA@mail.gmail.com>
Subject: Re: [PATCH] drm/nouveau: add missing single_release()
To:     Wei Yongjun <weiyongjun1@huawei.com>
Cc:     Ben Skeggs <bskeggs@redhat.com>, David Airlie <airlied@linux.ie>,
        Daniel Vetter <daniel@ffwll.ch>,
        nouveau <nouveau@lists.freedesktop.org>,
        kernel-janitors@vger.kernel.org,
        LKML <linux-kernel@vger.kernel.org>,
        dri-devel <dri-devel@lists.freedesktop.org>
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Reviewed-by: Karol Herbst <kherbst@redhat.com>

On Thu, Sep 5, 2019 at 9:14 AM Wei Yongjun <weiyongjun1@huawei.com> wrote:
>
> When using single_open() for opening, single_release() should be
> used, otherwise there is a memory leak.
>
> This is detected by Coccinelle semantic patch.
>
> Fixes: 6e9fc177399f ("drm/nouveau/debugfs: add copy of sysfs pstate interface ported to debugfs")
> Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
> ---
>  drivers/gpu/drm/nouveau/nouveau_debugfs.c | 1 +
>  1 file changed, 1 insertion(+)
>
> diff --git a/drivers/gpu/drm/nouveau/nouveau_debugfs.c b/drivers/gpu/drm/nouveau/nouveau_debugfs.c
> index 7dfbbbc1beea..35695f493271 100644
> --- a/drivers/gpu/drm/nouveau/nouveau_debugfs.c
> +++ b/drivers/gpu/drm/nouveau/nouveau_debugfs.c
> @@ -202,6 +202,7 @@ static const struct file_operations nouveau_pstate_fops = {
>         .open = nouveau_debugfs_pstate_open,
>         .read = seq_read,
>         .write = nouveau_debugfs_pstate_set,
> +       .release = single_release,
>  };
>
>  static struct drm_info_list nouveau_debugfs_list[] = {
>
>
>
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