for_each_matching_node performs an of_node_get on each iteration, so a break out of the loop requires an of_node_put.
A simplified version of the semantic patch that fixes this problem is as follows (http://coccinelle.lip6.fr):
// <smpl> @@ local idexpression n; expression e; @@
for_each_matching_node(n,...) { ... ( of_node_put(n); | e = n | + of_node_put(n); ? break; ) ... } ... when != n // </smpl>
Signed-off-by: Julia Lawall Julia.Lawall@lip6.fr
--- drivers/gpu/drm/tegra/dc.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/tegra/dc.c b/drivers/gpu/drm/tegra/dc.c index b4af4ab..f0e6f37 100644 --- a/drivers/gpu/drm/tegra/dc.c +++ b/drivers/gpu/drm/tegra/dc.c @@ -1945,8 +1945,10 @@ static int tegra_dc_parse_dt(struct tegra_dc *dc) * cases where only a single display controller is used. */ for_each_matching_node(np, tegra_dc_of_match) { - if (np == dc->dev->of_node) + if (np == dc->dev->of_node) { + of_node_put(np); break; + }
value++; }