linux-kernel - [PATCH 5/5] retmoteproc: imx_dsp_rproc: Call of_node

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Message-Id: <20230320221826.2728078-6-mathieu.poirier@linaro.org>
Date:   Mon, 20 Mar 2023 16:18:26 -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 5/5] retmoteproc: imx_dsp_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: ec0e5549f358 ("remoteproc: imx_dsp_rproc: Add remoteproc driver for DSP on i.MX")
Cc: stable@...r.kernel.org
Signed-off-by: Mathieu Poirier <mathieu.poirier@...aro.org>
---
 drivers/remoteproc/imx_dsp_rproc.c | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/drivers/remoteproc/imx_dsp_rproc.c b/drivers/remoteproc/imx_dsp_rproc.c
index b8f268d41773..21759d9e5b7b 100644
--- a/drivers/remoteproc/imx_dsp_rproc.c
+++ b/drivers/remoteproc/imx_dsp_rproc.c
@@ -650,15 +650,19 @@ static int imx_dsp_rproc_add_carveout(struct imx_dsp_rproc *priv)
 
 		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;
 		}
 
-		if (imx_dsp_rproc_sys_to_da(priv, rmem->base, rmem->size, &da))
+		if (imx_dsp_rproc_sys_to_da(priv, rmem->base, rmem->size, &da)) {
+			of_node_put(it.node);
 			return -EINVAL;
+		}
 
 		cpu_addr = devm_ioremap_wc(dev, rmem->base, rmem->size);
 		if (!cpu_addr) {
+			of_node_put(it.node);
 			dev_err(dev, "failed to map memory %p\n", &rmem->base);
 			return -ENOMEM;
 		}
@@ -667,10 +671,12 @@ static int imx_dsp_rproc_add_carveout(struct imx_dsp_rproc *priv)
 		mem = rproc_mem_entry_init(dev, (void __force *)cpu_addr, (dma_addr_t)rmem->base,
 					   rmem->size, da, NULL, NULL, it.node->name);
 
-		if (mem)
+		if (mem) {
 			rproc_coredump_add_segment(rproc, da, rmem->size);
-		else
+		} else {
+			of_node_put(it.node);
 			return -ENOMEM;
+		}
 
 		rproc_add_carveout(rproc, mem);
 	}
-- 
2.25.1