Re: [PATCH] drm/meson: Fix refcount leak in meson_encoder_hdmi_init

Neil Armstrong
2022-05-12T09:32:30Z

Hi,

On 12/05/2022 11:21, Miaoqian Lin wrote:
> of_find_device_by_node() takes a reference to the embedded struct device,
> we should use put_device() to release it when not need anymore.
> Add missing put_device() in error path to avoid refcount leak.
>
> Fixes: 0af5e0b41110 ("drm/meson: encoder_hdmi: switch to bridge DRM_BRIDGE_ATTACH_NO_CONNECTOR")
> Signed-off-by: Miaoqian Lin <linmq006@gmail.com>

You already sent the same patch yesterday, please avoid this.

Neil

> ---
> drivers/gpu/drm/meson/meson_encoder_hdmi.c | 4 +++-
> 1 file changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/meson/meson_encoder_hdmi.c b/drivers/gpu/drm/meson/meson_encoder_hdmi.c
> index 5e306de6f485..de87f02cd388 100644
> --- a/drivers/gpu/drm/meson/meson_encoder_hdmi.c
> +++ b/drivers/gpu/drm/meson/meson_encoder_hdmi.c
> @@ -435,8 +435,10 @@ int meson_encoder_hdmi_init(struct meson_drm *priv)
> cec_fill_conn_info_from_drm(&conn_info, meson_encoder_hdmi->connector);
>
> notifier = cec_notifier_conn_register(&pdev->dev, NULL, &conn_info);
> - if (!notifier)
> + if (!notifier) {
> + put_device(&pdev->dev);
> return -ENOMEM;
> + }
>
> meson_encoder_hdmi->cec_notifier = notifier;
> }