bus: arm-integrator-lm: Add of_node_put() before return statement

Every iteration of for_each_available_child_of_node() decrements
the reference count of the previous node, however when control is
transferred from the middle of the loop, as in the case of a return
or break or goto, there is no decrement thus ultimately resulting in
a memory leak.

Fix a potential memory leak in arm-integrator-lm.c by inserting
of_node_put() before a return statement.

Issue found with Coccinelle.

Signed-off-by: Sumera Priyadarsini <sylphrenadin@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20200829174154.GA9319@Kaladin
Link: https://lore.kernel.org/r/20210112092549.251548-1-linus.walleij@linaro.org'
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

diff --git a/drivers/bus/arm-integrator-lm.c b/drivers/bus/arm-integrator-lm.c
index 845b6c43fef897bc1cf562d6f2251c01fb8c9861..2344d560b1449c0f8115dbba82f96ac9ae068aaa 100644 (file)
--- a/drivers/bus/arm-integrator-lm.c
+++ b/drivers/bus/arm-integrator-lm.c
@@ -54,6 +54,7 @@ static int integrator_lm_populate(int num, struct device *dev)
                        ret = of_platform_default_populate(child, NULL, dev);
                        if (ret) {
                                dev_err(dev, "failed to populate module\n");
+                               of_node_put(child);
                                return ret;
                        }
                }