The patch below does not apply to the 4.9-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to stable@vger.kernel.org.
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
From f44b799603a9b5d2e375b0b2d54dd0b791eddfc2 Mon Sep 17 00:00:00 2001 From: Miaoqian Lin linmq006@gmail.com Date: Thu, 26 May 2022 12:28:56 +0400 Subject: [PATCH] PM / devfreq: exynos-ppmu: Fix refcount leak in of_get_devfreq_events
of_get_child_by_name() returns a node pointer with refcount incremented, we should use of_node_put() on it when done. This function only calls of_node_put() in normal path, missing it in error paths. Add missing of_node_put() to avoid refcount leak.
Fixes: f262f28c1470 ("PM / devfreq: event: Add devfreq_event class") Signed-off-by: Miaoqian Lin linmq006@gmail.com Signed-off-by: Chanwoo Choi cw00.choi@samsung.com
diff --git a/drivers/devfreq/event/exynos-ppmu.c b/drivers/devfreq/event/exynos-ppmu.c index 9b849d781116..a443e7c42daf 100644 --- a/drivers/devfreq/event/exynos-ppmu.c +++ b/drivers/devfreq/event/exynos-ppmu.c @@ -519,15 +519,19 @@ static int of_get_devfreq_events(struct device_node *np,
count = of_get_child_count(events_np); desc = devm_kcalloc(dev, count, sizeof(*desc), GFP_KERNEL); - if (!desc) + if (!desc) { + of_node_put(events_np); return -ENOMEM; + } info->num_events = count;
of_id = of_match_device(exynos_ppmu_id_match, dev); if (of_id) info->ppmu_type = (enum exynos_ppmu_type)of_id->data; - else + else { + of_node_put(events_np); return -EINVAL; + }
j = 0; for_each_child_of_node(events_np, node) {