[PATCH] char: hpet: fix a missing check of ioremap

From: Kangjie Lu
Date: Fri Mar 08 2019 - 22:52:40 EST


Check if ioremap fails, and if so, return AE_ERROR.

Signed-off-by: Kangjie Lu <kjlu@xxxxxxx>
---
drivers/char/hpet.c | 2 ++
1 file changed, 2 insertions(+)

diff --git a/drivers/char/hpet.c b/drivers/char/hpet.c
index d0ad85900b79..3a1e6b3ccd10 100644
--- a/drivers/char/hpet.c
+++ b/drivers/char/hpet.c
@@ -973,6 +973,8 @@ static acpi_status hpet_resources(struct acpi_resource *res, void *data)
if (ACPI_SUCCESS(status)) {
hdp->hd_phys_address = addr.address.minimum;
hdp->hd_address = ioremap(addr.address.minimum, addr.address.address_length);
+ if (!hdp->hd_address)
+ return AE_ERROR;

if (hpet_is_known(hdp)) {
iounmap(hdp->hd_address);
--
2.17.1