linux-kernel - [PATCH] soc: renesas: renesas-soc: release 'chipid' from ioremap()

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Message-Id: <20230331095545.31823-1-lidaxian@hust.edu.cn>
Date:   Fri, 31 Mar 2023 17:55:44 +0800
From:   Li Yang <lidaxian@...t.edu.cn>
To:     Geert Uytterhoeven <geert+renesas@...der.be>,
        Magnus Damm <magnus.damm@...il.com>,
        Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>,
        Biju Das <biju.das.jz@...renesas.com>
Cc:     Li Yang <lidaxian@...t.edu.cn>, Dan Carpenter <error27@...il.com>,
        linux-renesas-soc@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] soc: renesas: renesas-soc: release 'chipid' from ioremap()

Smatch reports:

drivers/soc/renesas/renesas-soc.c:536 renesas_soc_init() warn:
'chipid' from ioremap() not released on lines: 475.

If soc_dev_atrr allocation is failed, function renesas_soc_init()
will return without releasing 'chipid' from ioremap().

Fix this by adding function iounmap().

Fixes: cb5508e47e60 ("soc: renesas: Add support for reading product revision for RZ/G2L family")
Signed-off-by: Li Yang <lidaxian@...t.edu.cn>
Reviewed-by: Dan Carpenter <error27@...il.com>
---
 drivers/soc/renesas/renesas-soc.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/soc/renesas/renesas-soc.c b/drivers/soc/renesas/renesas-soc.c
index 468ebce1ea88..51191d1a6dd1 100644
--- a/drivers/soc/renesas/renesas-soc.c
+++ b/drivers/soc/renesas/renesas-soc.c
@@ -471,8 +471,11 @@ static int __init renesas_soc_init(void)
 	}
 
 	soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL);
-	if (!soc_dev_attr)
+	if (!soc_dev_attr) {
+		if (chipid)
+			iounmap(chipid);
 		return -ENOMEM;
+	}
 
 	np = of_find_node_by_path("/");
 	of_property_read_string(np, "model", &soc_dev_attr->machine);
-- 
2.34.1