linux-kernel - [PATCH] drm: of: fix link error

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Date:   Tue,  7 Jan 2020 22:37:32 +0100
From:   Arnd Bergmann <arnd@...db.de>
To:     Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Maxime Ripard <mripard@...nel.org>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Fabrizio Castro <fabrizio.castro@...renesas.com>
Cc:     Arnd Bergmann <arnd@...db.de>,
        Laurent Pinchart <laurent.pinchart+renesas@...asonboard.com>,
        dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: [PATCH] drm: of: fix link error

The new dummy helper is non-static, so every driver gets
its own copy, leading to a link failure:

drivers/gpu/drm/imx/imx-ldb.o: In function `drm_of_lvds_get_dual_link_pixel_order':
imx-ldb.c:(.text+0x140): multiple definition of `drm_of_lvds_get_dual_link_pixel_order'
drivers/gpu/drm/imx/imx-drm-core.o:imx-drm-core.c:(.text+0x330): first defined here
drivers/gpu/drm/imx/dw_hdmi-imx.o: In function `drm_of_lvds_get_dual_link_pixel_order':
dw_hdmi-imx.c:(.text+0xd0): multiple definition of `drm_of_lvds_get_dual_link_pixel_order'
drivers/gpu/drm/imx/imx-drm-core.o:imx-drm-core.c:(.text+0x330): first defined here
drivers/gpu/drm/bridge/synopsys/dw-hdmi.o: In function `drm_of_lvds_get_dual_link_pixel_order':
dw-hdmi.c:(.text+0x3b90): multiple definition of `drm_of_lvds_get_dual_link_pixel_order'
drivers/gpu/drm/imx/imx-drm-core.o:imx-drm-core.c:(.text+0x330): first defined here
drivers/gpu/drm/etnaviv/etnaviv_drv.o: In function `drm_of_lvds_get_dual_link_pixel_order':
etnaviv_drv.c:(.text+0x9d0): multiple definition of `drm_of_lvds_get_dual_link_pixel_order'
drivers/gpu/drm/imx/imx-drm-core.o:imx-drm-core.c:(.text+0x330): first defined here

Add the missing 'static' keyword.

Fixes: 6529007522de ("drm: of: Add drm_of_lvds_get_dual_link_pixel_order")
Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
 include/drm/drm_of.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/drm/drm_of.h b/include/drm/drm_of.h
index 8ec7ca6d2369..3398be966021 100644
--- a/include/drm/drm_of.h
+++ b/include/drm/drm_of.h
@@ -92,7 +92,7 @@ static inline int drm_of_find_panel_or_bridge(const struct device_node *np,
 	return -EINVAL;
 }
 
-int drm_of_lvds_get_dual_link_pixel_order(const struct device_node *port1,
+static inline int drm_of_lvds_get_dual_link_pixel_order(const struct device_node *port1,
 					  const struct device_node *port2)
 {
 	return -EINVAL;
-- 
2.20.0