1 files changed, 9 insertions, 5 deletions

diff --git a/drivers/acpi/reboot.c b/drivers/acpi/reboot.c
index 93f91142d7ad..a6c77e8b37bd 100644
--- a/drivers/acpi/reboot.c
+++ b/drivers/acpi/reboot.c
@@ -15,9 +15,15 @@ void acpi_reboot(void)
 
         rr = &acpi_gbl_FADT.reset_register;
 
-        /* Is the reset register supported? */
-        if (!(acpi_gbl_FADT.flags & ACPI_FADT_RESET_REGISTER) ||
-            rr->bit_width != 8 || rr->bit_offset != 0)
+        /* 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 */
+        if (!(acpi_gbl_FADT.flags & ACPI_FADT_RESET_REGISTER))
                 return;
 
         reset_value = acpi_gbl_FADT.reset_value;
@@ -45,6 +51,4 @@ void acpi_reboot(void)
                 acpi_reset();
                 break;
         }
-        /* Wait ten seconds */
-        acpi_os_stall(10000000);
 }