[PATCH 5.15 687/779] Input: gscps2 - check return value of ioremap() in gscps2_probe()

From: Greg Kroah-Hartman
Date: Mon Aug 15 2022 - 15:48:08 EST


From: Xie Shaowen <studentxswpy@xxxxxxx>

commit e61b3125a4f036b3c6b87ffd656fc1ab00440ae9 upstream.

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

Fixes: 4bdc0d676a643 ("remove ioremap_nocache and devm_ioremap_nocache")
Cc: <stable@xxxxxxxxxxxxxxx> # v5.6+
Reported-by: Hacash Robot <hacashRobot@xxxxxxxxxxx>
Signed-off-by: Xie Shaowen <studentxswpy@xxxxxxx>
Signed-off-by: Helge Deller <deller@xxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/input/serio/gscps2.c | 4 ++++
1 file changed, 4 insertions(+)

--- a/drivers/input/serio/gscps2.c
+++ b/drivers/input/serio/gscps2.c
@@ -350,6 +350,10 @@ static int __init gscps2_probe(struct pa
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);