linux-kernel - [PATCH AUTOSEL 5.15 16/24] atm: firestream: check the return value of ioremap() in fs

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Message-Id: <20220309161946.136122-16-sashal@kernel.org>
Date:   Wed,  9 Mar 2022 11:19:35 -0500
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Jia-Ju Bai <baijiaju1990@...il.com>,
        TOTE Robot <oslab@...nghua.edu.cn>,
        "David S . Miller" <davem@...emloft.net>,
        Sasha Levin <sashal@...nel.org>, 3chas3@...il.com,
        linux-atm-general@...ts.sourceforge.net, netdev@...r.kernel.org
Subject: [PATCH AUTOSEL 5.15 16/24] atm: firestream: check the return value of ioremap() in fs_init()

From: Jia-Ju Bai <baijiaju1990@...il.com>

[ Upstream commit d4e26aaea7f82ba884dcb4acfe689406bc092dc3 ]

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

Reported-by: TOTE Robot <oslab@...nghua.edu.cn>
Signed-off-by: Jia-Ju Bai <baijiaju1990@...il.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/atm/firestream.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/atm/firestream.c b/drivers/atm/firestream.c
index 3bc3c314a467..4f67404fe64c 100644
--- a/drivers/atm/firestream.c
+++ b/drivers/atm/firestream.c
@@ -1676,6 +1676,8 @@ static int fs_init(struct fs_dev *dev)
 	dev->hw_base = pci_resource_start(pci_dev, 0);
 
 	dev->base = ioremap(dev->hw_base, 0x1000);
+	if (!dev->base)
+		return 1;
 
 	reset_chip (dev);
   
-- 
2.34.1