linux-kernel - [PATCH] Input: check the return value of ioremap() in gscps2

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Message-Id: <20220802072033.3211980-1-studentxswpy@163.com>
Date:   Tue,  2 Aug 2022 15:20:33 +0800
From:   studentxswpy@....com
To:     James.Bottomley@...senPartnership.com, deller@....de,
        dmitry.torokhov@...il.com, linux-parisc@...r.kernel.org,
        linux-input@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     Xie Shaowen <studentxswpy@....com>,
        Hacash Robot <hacashRobot@...tino.com>
Subject: [PATCH] Input: check the return value of ioremap() in gscps2_probe()

From: Xie Shaowen <studentxswpy@....com>

The function ioremap() in gscps2_probe() can fail, so
its return value should be checked.

Fixes: 4bdc0d676a643 ("remove ioremap_nocache and devm_ioremap_nocache")
Reported-by: Hacash Robot <hacashRobot@...tino.com>
Signed-off-by: Xie Shaowen <studentxswpy@....com>
---
 drivers/input/serio/gscps2.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/input/serio/gscps2.c b/drivers/input/serio/gscps2.c
index a9065c6ab550..da2c67cb8642 100644
--- a/drivers/input/serio/gscps2.c
+++ b/drivers/input/serio/gscps2.c
@@ -350,6 +350,10 @@ static int __init gscps2_probe(struct parisc_device *dev)
 	ps2port->port = serio;
 	ps2port->padev = dev;
 	ps2port->addr = ioremap(hpa, GSC_STATUS + 4);
+	if (!ps2port->addr) {
+		ret = -ENOMEM;
+		goto fail_nomem;
+	}
 	spin_lock_init(&ps2port->lock);
 
 	gscps2_reset(ps2port);
-- 
2.25.1