[PATCH 08/10] drm/panel: raspberrypi-touchscreen: Prevent double-free

[Sam Ravnborg]

Hi Maxime,
On Tue, Jul 20, 2021 at 03:45:23PM +0200, Maxime Ripard wrote:
> The mipi_dsi_device allocated by mipi_dsi_device_register_full() is
> already free'd on release.
> 
> Fixes: 2f733d6194bd ("drm/panel: Add support for the Raspberry Pi 7" Touchscreen.")
> Signed-off-by: Maxime Ripard <maxime at cerno.tech>
Reviewed-by: Sam Ravnborg <sam at ravnborg.org>

I did a quick audit (as using grep mostly) to see if other panels had
the same bug, but did not find others.

This patch should be applied to drm-misc-fixes independent of the rest of
the patches.

	Sam

> ---
>  drivers/gpu/drm/panel/panel-raspberrypi-touchscreen.c | 1 -
>  1 file changed, 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/panel/panel-raspberrypi-touchscreen.c b/drivers/gpu/drm/panel/panel-raspberrypi-touchscreen.c
> index 6f2ce3b81f47..462faae0f446 100644
> --- a/drivers/gpu/drm/panel/panel-raspberrypi-touchscreen.c
> +++ b/drivers/gpu/drm/panel/panel-raspberrypi-touchscreen.c
> @@ -447,7 +447,6 @@ static int rpi_touchscreen_remove(struct i2c_client *i2c)
>  	drm_panel_remove(&ts->base);
>  
>  	mipi_dsi_device_unregister(ts->dsi);
> -	kfree(ts->dsi);
>  
>  	return 0;
>  }
> -- 
> 2.31.1