From 07a5dcc4bed9d7cae54adf5aa10ff9f037a3204b Mon Sep 17 00:00:00 2001
From: Miaoqian Lin <linmq006@gmail.com>
Date: Tue, 8 Mar 2022 06:45:21 +0000
Subject: [PATCH] remoteproc: qcom_q6v5_mss: Fix some leaks in q6v5_alloc_memory_region
Git-commit: 07a5dcc4bed9d7cae54adf5aa10ff9f037a3204b
Patch-mainline: v5.18-rc1
References: git-fixes

The device_node pointer is returned by of_parse_phandle() or
of_get_child_by_name() with refcount incremented.
We should use of_node_put() on it when done.

This function only call of_node_put(node) when of_address_to_resource
succeeds, missing error cases.

Fixes: 278d744c46fd ("remoteproc: qcom: Fix potential device node leaks")
Fixes: 051fb70fd4ea ("remoteproc: qcom: Driver for the self-authenticating Hexagon v5")
Signed-off-by: Miaoqian Lin <linmq006@gmail.com>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20220308064522.13804-1-linmq006@gmail.com
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 drivers/remoteproc/qcom_q6v5_mss.c | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/drivers/remoteproc/qcom_q6v5_mss.c b/drivers/remoteproc/qcom_q6v5_mss.c
index 43ea8455546c..b9ab91540b00 100644
--- a/drivers/remoteproc/qcom_q6v5_mss.c
+++ b/drivers/remoteproc/qcom_q6v5_mss.c
@@ -1806,18 +1806,20 @@ static int q6v5_alloc_memory_region(struct q6v5 *qproc)
 	 * reserved memory regions from device's memory-region property.
 	 */
 	child = of_get_child_by_name(qproc->dev->of_node, "mba");
-	if (!child)
+	if (!child) {
 		node = of_parse_phandle(qproc->dev->of_node,
 					"memory-region", 0);
-	else
+	} else {
 		node = of_parse_phandle(child, "memory-region", 0);
+		of_node_put(child);
+	}
 
 	ret = of_address_to_resource(node, 0, &r);
+	of_node_put(node);
 	if (ret) {
 		dev_err(qproc->dev, "unable to resolve mba region\n");
 		return ret;
 	}
-	of_node_put(node);
 
 	qproc->mba_phys = r.start;
 	qproc->mba_size = resource_size(&r);
@@ -1828,14 +1830,15 @@ static int q6v5_alloc_memory_region(struct q6v5 *qproc)
 	} else {
 		child = of_get_child_by_name(qproc->dev->of_node, "mpss");
 		node = of_parse_phandle(child, "memory-region", 0);
+		of_node_put(child);
 	}
 
 	ret = of_address_to_resource(node, 0, &r);
+	of_node_put(node);
 	if (ret) {
 		dev_err(qproc->dev, "unable to resolve mpss region\n");
 		return ret;
 	}
-	of_node_put(node);
 
 	qproc->mpss_phys = qproc->mpss_reloc = r.start;
 	qproc->mpss_size = resource_size(&r);
-- 
2.31.1