Merge branch 'reset' into release

drivers/acpi/acpica/hwxface.c

@@ -80,14 +80,14 @@ acpi_status acpi_reset(void)
 
 	if (reset_reg->space_id == ACPI_ADR_SPACE_SYSTEM_IO) {
 		/*
-		 * For I/O space, write directly to the OSL. This bypasses the port
-		 * validation mechanism, which may block a valid write to the reset
-		 * register.
+		 * For I/O space, write directly to the OSL. This
+		 * bypasses the port validation mechanism, which may
+		 * block a valid write to the reset register. Spec
+		 * section 4.7.3.6 requires register width to be 8.
 		 */
 		status =
 		    acpi_os_write_port((acpi_io_address) reset_reg->address,
-				       acpi_gbl_FADT.reset_value,
-				       reset_reg->bit_width);
+				       acpi_gbl_FADT.reset_value, 8);
 	} else {
 		/* Write the reset value to the reset register */
 

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);
 }