From 95cf3e12e7f659e536215b37c67d46f3e2ce95cc Mon Sep 17 00:00:00 2001 From: Matthew Garrett <mjg@redhat.com> Date: Fri, 11 Mar 2011 16:12:20 -0500 Subject: [PATCH] ACPI: Make sure the FADT is at least rev 2 before using the reset register The reset register was only introduced with version 2 of the FADT, so we should check that the FADT revision before trusting its contents. Signed-off-by: Matthew Garrett <mjg@redhat.com> Signed-off-by: Len Brown <len.brown@intel.com> --- drivers/acpi/reboot.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/acpi/reboot.c b/drivers/acpi/reboot.c index 4870aaaa2ae1..a6c77e8b37bd 100644 --- a/drivers/acpi/reboot.c +++ b/drivers/acpi/reboot.c @@ -15,6 +15,11 @@ void acpi_reboot(void) rr = &acpi_gbl_FADT.reset_register; + /* ACPI reset register was only introduced with v2 of the FADT */ + + if (acpi_gbl_FADT.header.revision < 2) + return; + /* Is the reset register supported? The spec says we should be * checking the bit width and bit offset, but Windows ignores * these fields */ -- GitLab