linux-kernel - [PATCH 2/5] remoteproc: st: Call of_node

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Date:   Mon, 20 Mar 2023 16:18:23 -0600
From:   Mathieu Poirier <mathieu.poirier@...aro.org>
To:     andersson@...nel.org
Cc:     shawnguo@...nel.org, s.hauer@...gutronix.de, kernel@...gutronix.de,
        festevam@...il.com, linux-imx@....com, patrice.chotard@...s.st.com,
        mcoquelin.stm32@...il.com, alexandre.torgue@...s.st.com,
        arnaud.pouliquen@...com, hongxing.zhu@....com, peng.fan@....com,
        shengjiu.wang@....com, linux-remoteproc@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH 2/5] remoteproc: st: Call of_node_put() on iteration error

Function of_phandle_iterator_next() calls of_node_put() on the last
device_node it iterated over, but when the loop exits prematurely it has
to be called explicitly.

Fixes: 3df52ed7f269 ("remoteproc: st: add reserved memory support")
Cc: stable@...r.kernel.org
Signed-off-by: Mathieu Poirier <mathieu.poirier@...aro.org>
---
 drivers/remoteproc/st_remoteproc.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/remoteproc/st_remoteproc.c b/drivers/remoteproc/st_remoteproc.c
index a3268d95a50e..e6bd3c7a950a 100644
--- a/drivers/remoteproc/st_remoteproc.c
+++ b/drivers/remoteproc/st_remoteproc.c
@@ -129,6 +129,7 @@ static int st_rproc_parse_fw(struct rproc *rproc, const struct firmware *fw)
 	while (of_phandle_iterator_next(&it) == 0) {
 		rmem = of_reserved_mem_lookup(it.node);
 		if (!rmem) {
+			of_node_put(it.node);
 			dev_err(dev, "unable to acquire memory-region\n");
 			return -EINVAL;
 		}
@@ -150,8 +151,10 @@ static int st_rproc_parse_fw(struct rproc *rproc, const struct firmware *fw)
 							   it.node->name);
 		}
 
-		if (!mem)
+		if (!mem) {
+			of_node_put(it.node);
 			return -ENOMEM;
+		}
 
 		rproc_add_carveout(rproc, mem);
 		index++;
-- 
2.25.1