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Still DELAY(9) a little even when we do not do the status-check.

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jruoho 2010-08-22 04:42:57 +00:00
parent 7e5b4620db
commit 89188f9d4a
1 changed files with 13 additions and 6 deletions
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19
sys/arch/x86/acpi/acpi_cpu_md.c
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@ -1,4 +1,4 @@
/* $NetBSD: acpi_cpu_md.c,v 1.29 2010/08/21 18:25:45 jruoho Exp $ */
/* $NetBSD: acpi_cpu_md.c,v 1.30 2010/08/22 04:42:57 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_md.c,v 1.29 2010/08/21 18:25:45 jruoho Exp $");
__KERNEL_RCSID(0, "$NetBSD: acpi_cpu_md.c,v 1.30 2010/08/22 04:42:57 jruoho Exp $");
#include <sys/param.h>
#include <sys/bus.h>
@ -510,18 +510,23 @@ acpicpu_md_pstate_set(struct acpicpu_pstate *ps)
xc_wait(xc);
if (__predict_false(ps->ps_status == 0))
return 0;
goto out;
if (__predict_false(ps->ps_status_addr == 0))
return 0;
goto out;
if ((ps->ps_flags & ACPICPU_FLAG_P_TURBO) != 0)
return 0;
goto out;
xc = xc_broadcast(0, (xcfunc_t)acpicpu_md_pstate_status, ps, &rv);
xc_wait(xc);
return rv;
out:
DELAY(ps->ps_latency);
return 0;
}
static void
@ -587,8 +592,10 @@ acpicpu_md_tstate_set(struct acpicpu_tstate *ts)
xc = xc_broadcast(0, (xcfunc_t)x86_msr_xcall, &msr, NULL);
xc_wait(xc);
if (ts->ts_status == 0)
if (ts->ts_status == 0) {
DELAY(ts->ts_latency);
return 0;
}
xc = xc_broadcast(0, (xcfunc_t)acpicpu_md_tstate_status, ts, &rv);
xc_wait(xc);