diff options
| -rw-r--r-- | arch/arm/mach-tegra/cpu-tegra3.c | 28 |
1 files changed, 16 insertions, 12 deletions
diff --git a/arch/arm/mach-tegra/cpu-tegra3.c b/arch/arm/mach-tegra/cpu-tegra3.c index d9535273ea7f..374a27156f02 100644 --- a/arch/arm/mach-tegra/cpu-tegra3.c +++ b/arch/arm/mach-tegra/cpu-tegra3.c @@ -217,6 +217,8 @@ static void tegra_auto_hotplug_work_func(struct work_struct *work) { bool up = false; unsigned int cpu = nr_cpu_ids; + unsigned long now = jiffies; + static unsigned long last_change_time; mutex_lock(tegra3_cpu_lock); @@ -228,19 +230,17 @@ static void tegra_auto_hotplug_work_func(struct work_struct *work) cpu = tegra_get_slowest_cpu_n(); if (cpu < nr_cpu_ids) { up = false; - queue_delayed_work( - hotplug_wq, &hotplug_work, down_delay); - hp_stats_update(cpu, false); } else if (!is_lp_cluster() && !no_lp) { if(!clk_set_parent(cpu_clk, cpu_lp_clk)) { hp_stats_update(CONFIG_NR_CPUS, true); hp_stats_update(0, false); /* catch-up with governor target speed */ tegra_cpu_set_speed_cap(NULL); - } else - queue_delayed_work( - hotplug_wq, &hotplug_work, down_delay); + break; + } } + queue_delayed_work( + hotplug_wq, &hotplug_work, down_delay); break; case TEGRA_HP_UP: if (is_lp_cluster() && !no_lp) { @@ -255,18 +255,14 @@ static void tegra_auto_hotplug_work_func(struct work_struct *work) /* cpu speed is up and balanced - one more on-line */ case TEGRA_CPU_SPEED_BALANCED: cpu = cpumask_next_zero(0, cpu_online_mask); - if (cpu < nr_cpu_ids) { + if (cpu < nr_cpu_ids) up = true; - hp_stats_update(cpu, true); - } break; /* cpu speed is up, but skewed - remove one core */ case TEGRA_CPU_SPEED_SKEWED: cpu = tegra_get_slowest_cpu_n(); - if (cpu < nr_cpu_ids) { + if (cpu < nr_cpu_ids) up = false; - hp_stats_update(cpu, false); - } break; /* cpu speed is up, but under-utilized - do nothing */ case TEGRA_CPU_SPEED_BIASED: @@ -281,6 +277,14 @@ static void tegra_auto_hotplug_work_func(struct work_struct *work) pr_err("%s: invalid tegra hotplug state %d\n", __func__, hp_state); } + + if (!up && ((now - last_change_time) < down_delay)) + cpu = nr_cpu_ids; + + if (cpu < nr_cpu_ids) { + last_change_time = now; + hp_stats_update(cpu, up); + } mutex_unlock(tegra3_cpu_lock); if (cpu < nr_cpu_ids) { |