From: Paul Kocialkowski paul.kocialkowski@bootlin.com
[ Upstream commit aec9fe892812ed10d0bffcf309d2a8fc380d8ce6 ]
In the Rockchip DRM LVDS component driver, the endpoint id provided to drm_of_find_panel_or_bridge is grabbed from the endpoint's reg property.
However, the property may be missing in the case of a single endpoint. Initialize the endpoint_id variable to 0 to avoid using an uninitialized variable in that case.
Fixes: 34cc0aa25456 ("drm/rockchip: Add support for Rockchip Soc LVDS") Signed-off-by: Paul Kocialkowski paul.kocialkowski@bootlin.com Signed-off-by: Heiko Stuebner heiko@sntech.de Link: https://patchwork.freedesktop.org/patch/msgid/20201110200430.1713467-1-paul.... Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/gpu/drm/rockchip/rockchip_lvds.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/rockchip/rockchip_lvds.c b/drivers/gpu/drm/rockchip/rockchip_lvds.c index 63f967902c2d8..a29912f3b997e 100644 --- a/drivers/gpu/drm/rockchip/rockchip_lvds.c +++ b/drivers/gpu/drm/rockchip/rockchip_lvds.c @@ -544,7 +544,7 @@ static int rockchip_lvds_bind(struct device *dev, struct device *master, struct device_node *port, *endpoint; int ret = 0, child_count = 0; const char *name; - u32 endpoint_id; + u32 endpoint_id = 0;
lvds->drm_dev = drm_dev; port = of_graph_get_port_by_id(dev->of_node, 1);