svn commit: r282537 - head/sys/dev/acpica

[Andrew Turner]

Author: andrew
Date: Wed May  6 14:09:54 2015
New Revision: 282537
URL: https://svnweb.freebsd.org/changeset/base/282537

Log:
  If the power management timer is unsupported the PmTimerLength value will
  be zero.

Modified:
  head/sys/dev/acpica/acpi_timer.c

Modified: head/sys/dev/acpica/acpi_timer.c
==============================================================================
--- head/sys/dev/acpica/acpi_timer.c	Wed May  6 14:02:57 2015	(r282536)
+++ head/sys/dev/acpica/acpi_timer.c	Wed May  6 14:09:54 2015	(r282537)
@@ -128,7 +128,8 @@ acpi_timer_identify(driver_t *driver, de
     ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
 
     if (acpi_disabled("timer") || (acpi_quirks & ACPI_Q_TIMER) ||
-	acpi_timer_dev || acpi_timer_disabled)
+	acpi_timer_dev || acpi_timer_disabled ||
+	AcpiGbl_FADT.PmTimerLength == 0)
 	return_VOID;
 
     if ((dev = BUS_ADD_CHILD(parent, 2, "acpi_timer", 0)) == NULL) {