[PATCH] drm/omap: dss: Fix refcount leak bugs

[Liang He]

In dss_init_ports() and __dss_uninit_ports(), we should call
of_node_put() for the reference returned by of_graph_get_port_by_id()
in fail path or when it is not used anymore.

Fixes: 09bffa6e5192 ("drm: omap: use common OF graph helpers")
Signed-off-by: Liang He <win...@126.com>
---
 drivers/gpu/drm/omapdrm/dss/dss.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/omapdrm/dss/dss.c 
b/drivers/gpu/drm/omapdrm/dss/dss.c
index 0399f3390a0a..c4febb861910 100644
--- a/drivers/gpu/drm/omapdrm/dss/dss.c
+++ b/drivers/gpu/drm/omapdrm/dss/dss.c
@@ -1176,6 +1176,7 @@ static void __dss_uninit_ports(struct dss_device *dss, 
unsigned int num_ports)
                default:
                        break;
                }
+               of_node_put(port);
        }
 }
 
@@ -1208,11 +1209,13 @@ static int dss_init_ports(struct dss_device *dss)
                default:
                        break;
                }
+               of_node_put(port);
        }
 
        return 0;
 
 error:
+       of_node_put(port);
        __dss_uninit_ports(dss, i);
        return r;
 }
-- 
2.25.1