linux-kernel - Re: [RESEND PATCH] drm/mipi-dsi: Fix error handling in mipi_dsi_device_register

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Date:   Thu, 2 Jun 2022 09:11:09 +0200
From:   Andrzej Hajda <andrzej.hajda@...el.com>
To:     Miaoqian Lin <linmq006@...il.com>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Maxime Ripard <mripard@...nel.org>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Kyungmin Park <kyungmin.park@...sung.com>,
        Thierry Reding <treding@...dia.com>,
        dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: Re: [RESEND PATCH] drm/mipi-dsi: Fix error handling in
 mipi_dsi_device_register_full



On 01.06.2022 14:40, Miaoqian Lin wrote:
> In mipi_dsi_device_alloc(), it calls device_initialize(&dsi->dev);
> We need to use put_device() instead freeing directly.
>
> Fixes: 068a002 ("drm: Add MIPI DSI bus support")
> Signed-off-by: Miaoqian Lin <linmq006@...il.com>

Looks correct.
Reviewed-by: Andrzej Hajda <andrzej.hajda@...el.com>

Regards
Andrzej

> ---
>   drivers/gpu/drm/drm_mipi_dsi.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/drm_mipi_dsi.c b/drivers/gpu/drm/drm_mipi_dsi.c
> index c40bde96cfdf..8cc8deca006f 100644
> --- a/drivers/gpu/drm/drm_mipi_dsi.c
> +++ b/drivers/gpu/drm/drm_mipi_dsi.c
> @@ -228,7 +228,7 @@ mipi_dsi_device_register_full(struct mipi_dsi_host *host,
>   	ret = mipi_dsi_device_add(dsi);
>   	if (ret) {
>   		drm_err(host, "failed to add DSI device %d\n", ret);
> -		kfree(dsi);
> +		put_device(&dsi->dev);
>   		return ERR_PTR(ret);
>   	}
>