drm/mcde: Fix refcount leak in mcde_dsi_bind

[ Upstream commit 3a149169e4a2f9127022fec6ef5d71b4e804b3b9 ]

Every iteration of for_each_available_child_of_node() decrements
the reference counter of the previous node. There is no decrement
when break out from the loop and results in refcount leak.
Add missing of_node_put() to fix this.

Fixes: 5fc537bfd000 ("drm/mcde: Add new driver for ST-Ericsson MCDE")
Signed-off-by: Miaoqian Lin <linmq006@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20220525115411.65455-1-linmq006@gmail.com
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/gpu/drm/mcde/mcde_dsi.c b/drivers/gpu/drm/mcde/mcde_dsi.c
index 5275b2723293b7299f48cd11e48d8789db868c05..64e6fb806290828867f48b3637788b8183f26bd5 100644 (file)
--- a/drivers/gpu/drm/mcde/mcde_dsi.c
+++ b/drivers/gpu/drm/mcde/mcde_dsi.c
@@ -1118,6 +1118,7 @@ static int mcde_dsi_bind(struct device *dev, struct device *master,
                        bridge = of_drm_find_bridge(child);
                        if (!bridge) {
                                dev_err(dev, "failed to find bridge\n");
+                               of_node_put(child);
                                return -EINVAL;
                        }
                }