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drm/panel: make drm_panel.h self-contained

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[ Upstream commit bf3f5e98559360661a3d2af340d46522512c0b00 ]

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: 5fa8e4a221 ("drm/panel: Make of_drm_find_panel() return an ERR_PTR() instead of NULL")
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Acked-by: Thierry Reding <treding@nvidia.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Sean Paul <sean@poorly.run>
Cc: Boris Brezillon <bbrezillon@kernel.org>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20190718161507.2047-2-sam@ravnborg.org
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Jani Nikula 2019-07-18 18:14:57 +02:00 committed by Greg Kroah-Hartman
parent 6f8fa5c32d
commit e34d8d2b2e
1 changed files with 1 additions and 0 deletions
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include/drm/drm_panel.h
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@ -24,6 +24,7 @@
#ifndef __DRM_PANEL_H__
#define __DRM_PANEL_H__
#include <linux/err.h>
#include <linux/errno.h>
#include <linux/list.h>