Commit 95cf3e12 authored Mar 11, 2011 by Matthew Garrett Committed by Len Brown Mar 22, 2011

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>

parent 6734fe57

drivers/acpi/reboot.c

+5 −0

Original line number	Diff line number	Diff line
		@@ -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 */