linux-kernel - [PATCH] remoteproc: k3: Call of_node_put(rmem

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Message-ID: <c46b06f9-72b1-420b-9dce-a392b982140e@web.de>
Date: Tue, 24 Sep 2024 14:43:40 +0200
From: Markus Elfring <Markus.Elfring@....de>
To: linux-remoteproc@...r.kernel.org, Andrew Davis <afd@...com>,
 Bjorn Andersson <andersson@...nel.org>, Hari Nagalla <hnagalla@...com>,
 Martyn Welch <martyn.welch@...labora.com>,
 Mathieu Poirier <mathieu.poirier@...aro.org>, Suman Anna <s-anna@...com>,
 Wadim Egorov <w.egorov@...tec.de>
Cc: LKML <linux-kernel@...r.kernel.org>, kernel-janitors@...r.kernel.org,
 Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Subject: [PATCH] remoteproc: k3: Call of_node_put(rmem_np) only once in three
 functions

From: Markus Elfring <elfring@...rs.sourceforge.net>
Date: Tue, 24 Sep 2024 14:28:35 +0200

An of_node_put(rmem_np) call was immediately used after a pointer check
for a of_reserved_mem_lookup() call in three function implementations.
Thus call such a function only once instead directly before the checks.

This issue was transformed by using the Coccinelle software.

Signed-off-by: Markus Elfring <elfring@...rs.sourceforge.net>
---
 drivers/remoteproc/ti_k3_dsp_remoteproc.c | 6 ++----
 drivers/remoteproc/ti_k3_m4_remoteproc.c  | 6 ++----
 drivers/remoteproc/ti_k3_r5_remoteproc.c  | 3 +--
 3 files changed, 5 insertions(+), 10 deletions(-)

diff --git a/drivers/remoteproc/ti_k3_dsp_remoteproc.c b/drivers/remoteproc/ti_k3_dsp_remoteproc.c
index 8be3f631c192..d08a3a98ada1 100644
--- a/drivers/remoteproc/ti_k3_dsp_remoteproc.c
+++ b/drivers/remoteproc/ti_k3_dsp_remoteproc.c
@@ -576,11 +576,9 @@ static int k3_dsp_reserved_mem_init(struct k3_dsp_rproc *kproc)
 			return -EINVAL;

 		rmem = of_reserved_mem_lookup(rmem_np);
-		if (!rmem) {
-			of_node_put(rmem_np);
-			return -EINVAL;
-		}
 		of_node_put(rmem_np);
+		if (!rmem)
+			return -EINVAL;

 		kproc->rmem[i].bus_addr = rmem->base;
 		/* 64-bit address regions currently not supported */
diff --git a/drivers/remoteproc/ti_k3_m4_remoteproc.c b/drivers/remoteproc/ti_k3_m4_remoteproc.c
index 09f0484a90e1..a16fb165fced 100644
--- a/drivers/remoteproc/ti_k3_m4_remoteproc.c
+++ b/drivers/remoteproc/ti_k3_m4_remoteproc.c
@@ -433,11 +433,9 @@ static int k3_m4_reserved_mem_init(struct k3_m4_rproc *kproc)
 			return -EINVAL;

 		rmem = of_reserved_mem_lookup(rmem_np);
-		if (!rmem) {
-			of_node_put(rmem_np);
-			return -EINVAL;
-		}
 		of_node_put(rmem_np);
+		if (!rmem)
+			return -EINVAL;

 		kproc->rmem[i].bus_addr = rmem->base;
 		/* 64-bit address regions currently not supported */
diff --git a/drivers/remoteproc/ti_k3_r5_remoteproc.c b/drivers/remoteproc/ti_k3_r5_remoteproc.c
index 747ee467da88..d0ebdd5cfa70 100644
--- a/drivers/remoteproc/ti_k3_r5_remoteproc.c
+++ b/drivers/remoteproc/ti_k3_r5_remoteproc.c
@@ -1001,12 +1001,11 @@ static int k3_r5_reserved_mem_init(struct k3_r5_rproc *kproc)
 		}

 		rmem = of_reserved_mem_lookup(rmem_np);
+		of_node_put(rmem_np);
 		if (!rmem) {
-			of_node_put(rmem_np);
 			ret = -EINVAL;
 			goto unmap_rmem;
 		}
-		of_node_put(rmem_np);

 		kproc->rmem[i].bus_addr = rmem->base;
 		/*
--
2.46.1