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Do not accidentally write zeros to (PSTATE_CNT and CST_CNT) registers.

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This commit is contained in:
jruoho 2010-08-14 17:27:34 +00:00
parent f385c3dade
commit e04e55946a
2 changed files with 6 additions and 6 deletions
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6
sys/dev/acpi/acpi_cpu_cstate.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: acpi_cpu_cstate.c,v 1.26 2010/08/14 05:41:22 jruoho Exp $ */
/* $NetBSD: acpi_cpu_cstate.c,v 1.27 2010/08/14 17:27:34 jruoho Exp $ */
/*-
* Copyright (c) 2010 Jukka Ruohonen <jruohonen@iki.fi>
@ -27,7 +27,7 @@
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: acpi_cpu_cstate.c,v 1.26 2010/08/14 05:41:22 jruoho Exp $");
__KERNEL_RCSID(0, "$NetBSD: acpi_cpu_cstate.c,v 1.27 2010/08/14 17:27:34 jruoho Exp $");
#include <sys/param.h>
#include <sys/cpu.h>
@ -511,7 +511,7 @@ acpicpu_cstate_cst_bios(void)
const uint8_t val = AcpiGbl_FADT.CstControl;
const uint32_t addr = AcpiGbl_FADT.SmiCommand;
if (addr == 0)
if (addr == 0 || val == 0)
return;
(void)AcpiOsWritePort(addr, val, 8);

6
sys/dev/acpi/acpi_cpu_pstate.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: acpi_cpu_pstate.c,v 1.18 2010/08/14 05:41:22 jruoho Exp $ */
/* $NetBSD: acpi_cpu_pstate.c,v 1.19 2010/08/14 17:27:34 jruoho Exp $ */
/*-
* Copyright (c) 2010 Jukka Ruohonen <jruohonen@iki.fi>
@ -27,7 +27,7 @@
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: acpi_cpu_pstate.c,v 1.18 2010/08/14 05:41:22 jruoho Exp $");
__KERNEL_RCSID(0, "$NetBSD: acpi_cpu_pstate.c,v 1.19 2010/08/14 17:27:34 jruoho Exp $");
#include <sys/param.h>
#include <sys/evcnt.h>
@ -529,7 +529,7 @@ acpicpu_pstate_bios(void)
const uint8_t val = AcpiGbl_FADT.PstateControl;
const uint32_t addr = AcpiGbl_FADT.SmiCommand;
if (addr == 0)
if (addr == 0 || val == 0)
return;
(void)AcpiOsWritePort(addr, val, 8);