On Thu, Jul 18, 2019 at 06:14:57PM +0200, Sam Ravnborg wrote:
> From: Jani Nikula <jani.nikula@xxxxxxxxx>
>
> Fix build warning if drm_panel.h is built with CONFIG_OF=n or
> CONFIG_DRM_PANEL=n and included without the prerequisite err.h:
>
> ./include/drm/drm_panel.h: In function ‘of_drm_find_panel’:
> ./include/drm/drm_panel.h:203:9: error: implicit declaration of function ‘ERR_PTR’ [-Werror=implicit-function-declaration]
> return ERR_PTR(-ENODEV);
> ^~~~~~~
> ./include/drm/drm_panel.h:203:9: error: returning ‘int’ from a function with return type ‘struct drm_panel *’ makes pointer from integer without a cast [-Werror=int-conversion]
> return ERR_PTR(-ENODEV);
> ^~~~~~~~~~~~~~~~
>
> Fixes: 5fa8e4a22182 ("drm/panel: Make of_drm_find_panel() return an ERR_PTR() instead of NULL")
> Cc: Boris Brezillon <boris.brezillon@xxxxxxxxxxx>
> Signed-off-by: Jani Nikula <jani.nikula@xxxxxxxxx>
> Acked-by: Thierry Reding <treding@xxxxxxxxxx>
> Reviewed-by: Sam Ravnborg <sam@xxxxxxxxxxxx>
Reviewed-by: Sean Paul <sean@xxxxxxxxxx>
> ---
> include/drm/drm_panel.h | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/include/drm/drm_panel.h b/include/drm/drm_panel.h
> index 8c738c0e6e9f..26377836141c 100644
> --- a/include/drm/drm_panel.h
> +++ b/include/drm/drm_panel.h
> @@ -24,6 +24,7 @@
> #ifndef __DRM_PANEL_H__
> #define __DRM_PANEL_H__
>
> +#include <linux/err.h>
> #include <linux/errno.h>
> #include <linux/list.h>
>
> --
> 2.20.1
>
--
Sean Paul, Software Engineer, Google / Chromium OS
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