linux-kernel - [PATCH 5.18 168/181] soc: bcm: brcmstb: pm: pm-arm: Fix refcount leak in brcmstb_pm

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Date:   Mon, 27 Jun 2022 13:22:21 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Miaoqian Lin <linmq006@...il.com>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Florian Fainelli <f.fainelli@...il.com>
Subject: [PATCH 5.18 168/181] soc: bcm: brcmstb: pm: pm-arm: Fix refcount leak in brcmstb_pm_probe

From: Miaoqian Lin <linmq006@...il.com>

commit 37d838de369b07b596c19ff3662bf0293fdb09ee upstream.

of_find_matching_node() returns a node pointer with refcount
incremented, we should use of_node_put() on it when not need anymore.
Add missing of_node_put() to avoid refcount leak.

In brcmstb_init_sram, it pass dn to of_address_to_resource(),
of_address_to_resource() will call of_find_device_by_node() to take
reference, so we should release the reference returned by
of_find_matching_node().

Fixes: 0b741b8234c8 ("soc: bcm: brcmstb: Add support for S2/S3/S5 suspend states (ARM)")
Signed-off-by: Miaoqian Lin <linmq006@...il.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Signed-off-by: Florian Fainelli <f.fainelli@...il.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/soc/bcm/brcmstb/pm/pm-arm.c |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/soc/bcm/brcmstb/pm/pm-arm.c
+++ b/drivers/soc/bcm/brcmstb/pm/pm-arm.c
@@ -783,6 +783,7 @@ static int brcmstb_pm_probe(struct platf
 	}
 
 	ret = brcmstb_init_sram(dn);
+	of_node_put(dn);
 	if (ret) {
 		pr_err("error setting up SRAM for PM\n");
 		return ret;