ARM: OMAP2+: Fix refcount leak in omapdss_init_of

[ Upstream commit 9705db1eff38d6b9114121f9e253746199b759c9 ]

omapdss_find_dss_of_node() calls of_find_compatible_node() to get device
node. of_find_compatible_node() returns a node pointer with refcount
incremented, we should use of_node_put() on it when done.
Add missing of_node_put() in later error path and normal path.

Fixes: e0c827aca0730 ("drm/omap: Populate DSS children in omapdss driver")
Signed-off-by: Miaoqian Lin <linmq006@gmail.com>
Message-Id: <20220601044858.3352-1-linmq006@gmail.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/arch/arm/mach-omap2/display.c b/arch/arm/mach-omap2/display.c
index eb09a25e3b45d18a7d16843fa1b62c7059b68ae2..8d829f3dafe7688a58414fe51323d40533deacfd 100644 (file)
--- a/arch/arm/mach-omap2/display.c
+++ b/arch/arm/mach-omap2/display.c
@@ -260,11 +260,13 @@ static int __init omapdss_init_of(void)
 
        if (!pdev) {
                pr_err("Unable to find DSS platform device\n");
+               of_node_put(node);
                return -ENODEV;
        }
 
        r = of_platform_populate(node, NULL, NULL, &pdev->dev);
        put_device(&pdev->dev);
+       of_node_put(node);
        if (r) {
                pr_err("Unable to populate DSS submodule devices\n");
                return r;