From: Chen Ni <nichen@iscas.ac.cn>
Date: Fri, 15 Sep 2023 07:11:06 +0000 (+0000)
Subject: tty: serial: ma35d1_serial: Add missing check for ioremap
X-Git-Tag: v6.7-rc1~75^2~194
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=4556c36f4a23fb218763cdb7a20f6a94f4faf1f8;p=thirdparty%2Flinux.git

tty: serial: ma35d1_serial: Add missing check for ioremap

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

Signed-off-by: Chen Ni <nichen@iscas.ac.cn>
Acked-by: Jacky Huang <ychuang3@nuvoton.com>
Link: https://lore.kernel.org/r/20230915071106.3347-1-nichen@iscas.ac.cn
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/tty/serial/ma35d1_serial.c b/drivers/tty/serial/ma35d1_serial.c
index 465b1def9e119..dbfcb711e7102 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);