atm: firestream: check the return value of ioremap() in fs_init()

[ Upstream commit d4e26aaea7f82ba884dcb4acfe689406bc092dc3 ]

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

Reported-by: TOTE Robot <oslab@tsinghua.edu.cn>
Signed-off-by: Jia-Ju Bai <baijiaju1990@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/atm/firestream.c b/drivers/atm/firestream.c
index 5acb459856752f62a2a0a14bf649f7d88d547905..8995c39330fac76147980998361fe35df0c48349 100644 (file)
--- a/drivers/atm/firestream.c
+++ b/drivers/atm/firestream.c
@@ -1677,6 +1677,8 @@ 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);