[PATCH 5.10 221/390] mtd: devices: docg3: check the return value of devm_ioremap() in the probe

From: Greg Kroah-Hartman
Date: Mon Oct 24 2022 - 12:02:59 EST


From: William Dean <williamsukatube@xxxxxxxxx>

[ Upstream commit 26e784433e6c65735cd6d93a8db52531970d9a60 ]

The function devm_ioremap() in docg3_probe() can fail, so
its return value should be checked.

Fixes: 82402aeb8c81e ("mtd: docg3: Use devm_*() functions")
Reported-by: Hacash Robot <hacashRobot@xxxxxxxxxxx>
Signed-off-by: William Dean <williamsukatube@xxxxxxxxx>
Signed-off-by: Miquel Raynal <miquel.raynal@xxxxxxxxxxx>
Link: https://lore.kernel.org/linux-mtd/20220722091644.2937953-1-williamsukatube@xxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/mtd/devices/docg3.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/mtd/devices/docg3.c b/drivers/mtd/devices/docg3.c
index a030792115bc..fa42473d04c1 100644
--- a/drivers/mtd/devices/docg3.c
+++ b/drivers/mtd/devices/docg3.c
@@ -1975,9 +1975,14 @@ static int __init docg3_probe(struct platform_device *pdev)
dev_err(dev, "No I/O memory resource defined\n");
return ret;
}
- base = devm_ioremap(dev, ress->start, DOC_IOSPACE_SIZE);

ret = -ENOMEM;
+ base = devm_ioremap(dev, ress->start, DOC_IOSPACE_SIZE);
+ if (!base) {
+ dev_err(dev, "devm_ioremap dev failed\n");
+ return ret;
+ }
+
cascade = devm_kcalloc(dev, DOC_MAX_NBFLOORS, sizeof(*cascade),
GFP_KERNEL);
if (!cascade)
--
2.35.1