Merge branch 'linus' into perfcounters/core

[linux-3.10.git] / drivers / acpi / processor_idle.c

diff --git a/drivers/acpi/processor_idle.c b/drivers/acpi/processor_idle.c
index 429be896a030478b7345ba36902add9cd01f70ff..d2830f39d46b430ea501609938dbc7b835dd083d 100644 (file)
--- a/drivers/acpi/processor_idle.c
+++ b/drivers/acpi/processor_idle.c
@@ -145,6 +145,9 @@ static void acpi_timer_check_state(int state, struct acpi_processor *pr,
        struct acpi_processor_power *pwr = &pr->power;
        u8 type = local_apic_timer_c2_ok ? ACPI_STATE_C3 : ACPI_STATE_C2;
 
+       if (cpu_has(&cpu_data(pr->id), X86_FEATURE_ARAT))
+               return;
+
        /*
         * Check, if one of the previous states already marked the lapic
         * unstable
@@ -578,6 +581,11 @@ static int acpi_processor_power_verify(struct acpi_processor *pr)
        for (i = 1; i < ACPI_PROCESSOR_MAX_POWER; i++) {
                struct acpi_processor_cx *cx = &pr->power.states[i];
 
+#if defined (CONFIG_GENERIC_TIME) && defined (CONFIG_X86)
+               /* TSC could halt in idle, so notify users */
+               if (tsc_halts_in_c(cx->type))
+                       mark_tsc_unstable("TSC halts in idle");;
+#endif
                switch (cx->type) {
                case ACPI_STATE_C1:
                        cx->valid = 1;
@@ -654,11 +662,9 @@ static int acpi_processor_power_seq_show(struct seq_file *seq, void *offset)
 
        seq_printf(seq, "active state:            C%zd\n"
                   "max_cstate:              C%d\n"
-                  "bus master activity:     %08x\n"
                   "maximum allowed latency: %d usec\n",
                   pr->power.state ? pr->power.state - pr->power.states : 0,
-                  max_cstate, (unsigned)pr->power.bm_activity,
-                  pm_qos_requirement(PM_QOS_CPU_DMA_LATENCY));
+                  max_cstate, pm_qos_requirement(PM_QOS_CPU_DMA_LATENCY));
 
        seq_puts(seq, "states:\n");
 
@@ -872,11 +878,6 @@ static int acpi_idle_enter_simple(struct cpuidle_device *dev,
        kt2 = ktime_get_real();
        idle_time =  ktime_to_us(ktime_sub(kt2, kt1));
 
-#if defined (CONFIG_GENERIC_TIME) && defined (CONFIG_X86)
-       /* TSC could halt in idle, so notify users */
-       if (tsc_halts_in_c(cx->type))
-               mark_tsc_unstable("TSC halts in idle");;
-#endif
        sleep_ticks = us_to_pm_timer_ticks(idle_time);
 
        /* Tell the scheduler how much we idled: */
@@ -956,6 +957,7 @@ static int acpi_idle_enter_bm(struct cpuidle_device *dev,
         */
        acpi_state_timer_broadcast(pr, cx, 1);
 
+       kt1 = ktime_get_real();
        /*
         * disable bus master
         * bm_check implies we need ARB_DIS
@@ -977,10 +979,7 @@ static int acpi_idle_enter_bm(struct cpuidle_device *dev,
                ACPI_FLUSH_CPU_CACHE();
        }
 
-       kt1 = ktime_get_real();
        acpi_idle_do_entry(cx);
-       kt2 = ktime_get_real();
-       idle_time =  ktime_to_us(ktime_sub(kt2, kt1));
 
        /* Re-enable bus master arbitration */
        if (pr->flags.bm_check && pr->flags.bm_control) {
@@ -989,12 +988,9 @@ static int acpi_idle_enter_bm(struct cpuidle_device *dev,
                c3_cpu_count--;
                spin_unlock(&c3_lock);
        }
+       kt2 = ktime_get_real();
+       idle_time =  ktime_to_us(ktime_sub(kt2, kt1));
 
-#if defined (CONFIG_GENERIC_TIME) && defined (CONFIG_X86)
-       /* TSC could halt in idle, so notify users */
-       if (tsc_halts_in_c(ACPI_STATE_C3))
-               mark_tsc_unstable("TSC halts in idle");
-#endif
        sleep_ticks = us_to_pm_timer_ticks(idle_time);
        /* Tell the scheduler how much we idled: */
        sched_clock_idle_wakeup_event(sleep_ticks*PM_TIMER_TICK_NS);
@@ -1038,6 +1034,9 @@ static int acpi_processor_setup_cpuidle(struct acpi_processor *pr)
                dev->states[i].desc[0] = '\0';
        }
 
+       if (max_cstate == 0)
+               max_cstate = 1;
+
        for (i = 1; i < ACPI_PROCESSOR_MAX_POWER && i <= max_cstate; i++) {
                cx = &pr->power.states[i];
                state = &dev->states[count];