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From:   Chen Ni <nichen@iscas.ac.cn>
To:     ychuang3@nuvoton.com, schung@nuvoton.com,
        gregkh@linuxfoundation.org, jirislaby@kernel.org,
        ilpo.jarvinen@linux.intel.com
Cc:     linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org,
        linux-serial@vger.kernel.org, Chen Ni <nichen@iscas.ac.cn>
Subject: [PATCH] tty: serial: ma35d1_serial: Add missing check for ioremap
Date:   Fri, 15 Sep 2023 07:11:06 +0000
Message-Id: <20230915071106.3347-1-nichen@iscas.ac.cn>
MIME-Version: 1.0
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Precedence: bulk

Add check for ioremap() and return the error if it fails in order to
guarantee the success of ioremap().

Fixes: 930cbf92db01 ("tty: serial: Add Nuvoton ma35d1 serial driver support")
Signed-off-by: Chen Ni <nichen@iscas.ac.cn>
---
 drivers/tty/serial/ma35d1_serial.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/tty/serial/ma35d1_serial.c b/drivers/tty/serial/ma35d1_serial.c
index 465b1def9e11..4a9d1252de35 100644
--- a/drivers/tty/serial/ma35d1_serial.c
+++ b/drivers/tty/serial/ma35d1_serial.c
@@ -695,6 +695,9 @@ static int ma35d1serial_probe(struct platform_device *pdev)
 
 	up->port.iobase = res_mem->start;
 	up->port.membase = ioremap(up->port.iobase, MA35_UART_REG_SIZE);
+	if (!up->port.membase)
+		return -ENOMEM;
+
 	up->port.ops = &ma35d1serial_ops;
 
 	spin_lock_init(&up->port.lock);
-- 
2.25.1