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char: hpet: fix a missing check of ioremap

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

Signed-off-by: Kangjie Lu <kjlu@umn.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Kangjie Lu 2019-03-08 21:50:24 -06:00 committed by Greg Kroah-Hartman
parent d8fb3fafa2
commit 13bd14a41c
1 changed files with 2 additions and 0 deletions
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drivers/char/hpet.c
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@ -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);