linux-kernel - [PATCH 3/5] remoteproc: rcar_rproc: Call of_node

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Message-Id: <20230320221826.2728078-4-mathieu.poirier@linaro.org>
Date:   Mon, 20 Mar 2023 16:18:24 -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 3/5] remoteproc: rcar_rproc: 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: 285892a74f13 ("remoteproc: Add Renesas rcar driver")
Cc: stable@...r.kernel.org
Signed-off-by: Mathieu Poirier <mathieu.poirier@...aro.org>
---
 drivers/remoteproc/rcar_rproc.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/drivers/remoteproc/rcar_rproc.c b/drivers/remoteproc/rcar_rproc.c
index aa86154109c7..1ff2a73ade90 100644
--- a/drivers/remoteproc/rcar_rproc.c
+++ b/drivers/remoteproc/rcar_rproc.c
@@ -62,13 +62,16 @@ static int rcar_rproc_prepare(struct rproc *rproc)
 
 		rmem = of_reserved_mem_lookup(it.node);
 		if (!rmem) {
+			of_node_put(it.node);
 			dev_err(&rproc->dev,
 				"unable to acquire memory-region\n");
 			return -EINVAL;
 		}
 
-		if (rmem->base > U32_MAX)
+		if (rmem->base > U32_MAX) {
+			of_node_put(it.node);
 			return -EINVAL;
+		}
 
 		/* No need to translate pa to da, R-Car use same map */
 		da = rmem->base;
@@ -79,8 +82,10 @@ static int rcar_rproc_prepare(struct rproc *rproc)
 					   rcar_rproc_mem_release,
 					   it.node->name);
 
-		if (!mem)
+		if (!mem) {
+			of_node_put(it.node);
 			return -ENOMEM;
+		}
 
 		rproc_add_carveout(rproc, mem);
 	}
-- 
2.25.1