Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6

* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6:
  ACPI: Eliminate us to pm ticks conversion in common path
  ACPI: Fix the incorrect calculation about C-state idle time
  ACPI: update feature-removal.txt to reflect deleted acpi=ht option
  ACPI / EC / PM: Fix names of functions that block/unblock EC transactions
  ACPI / EC / PM: Fix race between EC transactions and system suspend

5 files changed, 55 insertions, 55 deletions

diff --git a/Documentation/feature-removal-schedule.txt b/Documentation/feature-removal-schedule.txt
index 672be0109d02..c268783bc4e7 100644
--- a/Documentation/feature-removal-schedule.txt
+++ b/Documentation/feature-removal-schedule.txt
@@ -578,15 +578,6 @@ Who:	Avi Kivity <avi@redhat.com>
 
 ----------------------------
 
-What:   "acpi=ht" boot option
-When:   2.6.35
-Why:    Useful in 2003, implementation is a hack.
-        Generally invoked by accident today.
-        Seen as doing more harm than good.
-Who:    Len Brown <len.brown@intel.com>
-
-----------------------------
-
 What:   iwlwifi 50XX module parameters
 When:   2.6.40
 Why:    The "..50" modules parameters were used to configure 5000 series and
diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c
index e61d4f8e62a5..5f2027d782e8 100644
--- a/drivers/acpi/ec.c
+++ b/drivers/acpi/ec.c
@@ -79,7 +79,7 @@ enum {
         EC_FLAGS_GPE_STORM,             /* GPE storm detected */
         EC_FLAGS_HANDLERS_INSTALLED,    /* Handlers for GPE and
                                          * OpReg are installed */
-        EC_FLAGS_FROZEN,                /* Transactions are suspended */
+        EC_FLAGS_BLOCKED,               /* Transactions are blocked */
 };
 
 /* If we find an EC via the ECDT, we need to keep a ptr to its context */
@@ -293,7 +293,7 @@ static int acpi_ec_transaction(struct acpi_ec *ec, struct transaction *t)
         if (t->rdata)
                 memset(t->rdata, 0, t->rlen);
         mutex_lock(&ec->lock);
-        if (test_bit(EC_FLAGS_FROZEN, &ec->flags)) {
+        if (test_bit(EC_FLAGS_BLOCKED, &ec->flags)) {
                 status = -EINVAL;
                 goto unlock;
         }
@@ -459,7 +459,7 @@ int ec_transaction(u8 command,
 
 EXPORT_SYMBOL(ec_transaction);
 
-void acpi_ec_suspend_transactions(void)
+void acpi_ec_block_transactions(void)
 {
         struct acpi_ec *ec = first_ec;
 
@@ -468,11 +468,11 @@ void acpi_ec_suspend_transactions(void)
 
         mutex_lock(&ec->lock);
         /* Prevent transactions from being carried out */
-        set_bit(EC_FLAGS_FROZEN, &ec->flags);
+        set_bit(EC_FLAGS_BLOCKED, &ec->flags);
         mutex_unlock(&ec->lock);
 }
 
-void acpi_ec_resume_transactions(void)
+void acpi_ec_unblock_transactions(void)
 {
         struct acpi_ec *ec = first_ec;
 
@@ -481,10 +481,20 @@ void acpi_ec_resume_transactions(void)
 
         mutex_lock(&ec->lock);
         /* Allow transactions to be carried out again */
-        clear_bit(EC_FLAGS_FROZEN, &ec->flags);
+        clear_bit(EC_FLAGS_BLOCKED, &ec->flags);
         mutex_unlock(&ec->lock);
 }
 
+void acpi_ec_unblock_transactions_early(void)
+{
+        /*
+         * Allow transactions to happen again (this function is called from
+         * atomic context during wakeup, so we don't need to acquire the mutex).
+         */
+        if (first_ec)
+                clear_bit(EC_FLAGS_BLOCKED, &first_ec->flags);
+}
+
 static int acpi_ec_query_unlocked(struct acpi_ec *ec, u8 * data)
 {
         int result;
diff --git a/drivers/acpi/internal.h b/drivers/acpi/internal.h
index e28411367239..f8f190ec066e 100644
--- a/drivers/acpi/internal.h
+++ b/drivers/acpi/internal.h
@@ -49,8 +49,9 @@ void acpi_early_processor_set_pdc(void);
 int acpi_ec_init(void);
 int acpi_ec_ecdt_probe(void);
 int acpi_boot_ec_enable(void);
-void acpi_ec_suspend_transactions(void);
-void acpi_ec_resume_transactions(void);
+void acpi_ec_block_transactions(void);
+void acpi_ec_unblock_transactions(void);
+void acpi_ec_unblock_transactions_early(void);
 
 /*--------------------------------------------------------------------------
                                   Suspend/Resume
diff --git a/drivers/acpi/processor_idle.c b/drivers/acpi/processor_idle.c
index 2e8c27d48f2b..b1b385692f46 100644
--- a/drivers/acpi/processor_idle.c
+++ b/drivers/acpi/processor_idle.c
@@ -80,7 +80,7 @@ module_param(nocst, uint, 0000);
 static unsigned int latency_factor __read_mostly = 2;
 module_param(latency_factor, uint, 0644);
 
-static s64 us_to_pm_timer_ticks(s64 t)
+static u64 us_to_pm_timer_ticks(s64 t)
 {
         return div64_u64(t * PM_TIMER_FREQUENCY, 1000000);
 }
@@ -731,10 +731,10 @@ static int acpi_processor_power_seq_show(struct seq_file *seq, void *offset)
 
                 seq_puts(seq, "demotion[--] ");
 
-                seq_printf(seq, "latency[%03d] usage[%08d] duration[%020llu]\n",
+                seq_printf(seq, "latency[%03d] usage[%08d] duration[%020Lu]\n",
                            pr->power.states[i].latency,
                            pr->power.states[i].usage,
-                           (unsigned long long)pr->power.states[i].time);
+                           us_to_pm_timer_ticks(pr->power.states[i].time));
         }
 
       end:
@@ -861,7 +861,6 @@ static int acpi_idle_enter_simple(struct cpuidle_device *dev,
         ktime_t  kt1, kt2;
         s64 idle_time_ns;
         s64 idle_time;
-        s64 sleep_ticks = 0;
 
         pr = __get_cpu_var(processors);
 
@@ -906,8 +905,6 @@ static int acpi_idle_enter_simple(struct cpuidle_device *dev,
         idle_time = idle_time_ns;
         do_div(idle_time, NSEC_PER_USEC);
 
-        sleep_ticks = us_to_pm_timer_ticks(idle_time);
-
         /* Tell the scheduler how much we idled: */
         sched_clock_idle_wakeup_event(idle_time_ns);
 
@@ -918,7 +915,7 @@ static int acpi_idle_enter_simple(struct cpuidle_device *dev,
         cx->usage++;
 
         lapic_timer_state_broadcast(pr, cx, 0);
-        cx->time += sleep_ticks;
+        cx->time += idle_time;
         return idle_time;
 }
 
@@ -940,7 +937,6 @@ static int acpi_idle_enter_bm(struct cpuidle_device *dev,
         ktime_t  kt1, kt2;
         s64 idle_time_ns;
         s64 idle_time;
-        s64 sleep_ticks = 0;
 
 
         pr = __get_cpu_var(processors);
@@ -1022,11 +1018,10 @@ static int acpi_idle_enter_bm(struct cpuidle_device *dev,
                 spin_unlock(&c3_lock);
         }
         kt2 = ktime_get_real();
-        idle_time_ns = ktime_to_us(ktime_sub(kt2, kt1));
+        idle_time_ns = ktime_to_ns(ktime_sub(kt2, kt1));
         idle_time = idle_time_ns;
         do_div(idle_time, NSEC_PER_USEC);
 
-        sleep_ticks = us_to_pm_timer_ticks(idle_time);
         /* Tell the scheduler how much we idled: */
         sched_clock_idle_wakeup_event(idle_time_ns);
 
@@ -1037,7 +1032,7 @@ static int acpi_idle_enter_bm(struct cpuidle_device *dev,
         cx->usage++;
 
         lapic_timer_state_broadcast(pr, cx, 0);
-        cx->time += sleep_ticks;
+        cx->time += idle_time;
         return idle_time;
 }
 
diff --git a/drivers/acpi/sleep.c b/drivers/acpi/sleep.c
index 4ab2275b4461..3fb4bdea7e06 100644
--- a/drivers/acpi/sleep.c
+++ b/drivers/acpi/sleep.c
@@ -94,11 +94,13 @@ void __init acpi_old_suspend_ordering(void)
 }
 
 /**
- *      acpi_pm_disable_gpes - Disable the GPEs.
+ * acpi_pm_freeze - Disable the GPEs and suspend EC transactions.
  */
-static int acpi_pm_disable_gpes(void)
+static int acpi_pm_freeze(void)
 {
         acpi_disable_all_gpes();
+        acpi_os_wait_events_complete(NULL);
+        acpi_ec_block_transactions();
         return 0;
 }
 
@@ -126,7 +128,8 @@ static int acpi_pm_prepare(void)
         int error = __acpi_pm_prepare();
 
         if (!error)
-                acpi_disable_all_gpes();
+                acpi_pm_freeze();
+
         return error;
 }
 
@@ -256,6 +259,8 @@ static int acpi_suspend_enter(suspend_state_t pm_state)
          * acpi_leave_sleep_state will reenable specific GPEs later
          */
         acpi_disable_all_gpes();
+        /* Allow EC transactions to happen. */
+        acpi_ec_unblock_transactions_early();
 
         local_irq_restore(flags);
         printk(KERN_DEBUG "Back to C!\n");
@@ -267,6 +272,12 @@ static int acpi_suspend_enter(suspend_state_t pm_state)
         return ACPI_SUCCESS(status) ? 0 : -EFAULT;
 }
 
+static void acpi_suspend_finish(void)
+{
+        acpi_ec_unblock_transactions();
+        acpi_pm_finish();
+}
+
 static int acpi_suspend_state_valid(suspend_state_t pm_state)
 {
         u32 acpi_state;
@@ -288,7 +299,7 @@ static struct platform_suspend_ops acpi_suspend_ops = {
         .begin = acpi_suspend_begin,
         .prepare_late = acpi_pm_prepare,
         .enter = acpi_suspend_enter,
-        .wake = acpi_pm_finish,
+        .wake = acpi_suspend_finish,
         .end = acpi_pm_end,
 };
 
@@ -314,9 +325,9 @@ static int acpi_suspend_begin_old(suspend_state_t pm_state)
 static struct platform_suspend_ops acpi_suspend_ops_old = {
         .valid = acpi_suspend_state_valid,
         .begin = acpi_suspend_begin_old,
-        .prepare_late = acpi_pm_disable_gpes,
+        .prepare_late = acpi_pm_freeze,
         .enter = acpi_suspend_enter,
-        .wake = acpi_pm_finish,
+        .wake = acpi_suspend_finish,
         .end = acpi_pm_end,
         .recover = acpi_pm_finish,
 };
@@ -433,6 +444,7 @@ static int acpi_hibernation_enter(void)
 static void acpi_hibernation_finish(void)
 {
         hibernate_nvs_free();
+        acpi_ec_unblock_transactions();
         acpi_pm_finish();
 }
 
@@ -453,19 +465,13 @@ static void acpi_hibernation_leave(void)
         }
         /* Restore the NVS memory area */
         hibernate_nvs_restore();
+        /* Allow EC transactions to happen. */
+        acpi_ec_unblock_transactions_early();
 }
 
-static int acpi_pm_pre_restore(void)
-{
-        acpi_disable_all_gpes();
-        acpi_os_wait_events_complete(NULL);
-        acpi_ec_suspend_transactions();
-        return 0;
-}
-
-static void acpi_pm_restore_cleanup(void)
+static void acpi_pm_thaw(void)
 {
-        acpi_ec_resume_transactions();
+        acpi_ec_unblock_transactions();
         acpi_enable_all_runtime_gpes();
 }
 
@@ -477,8 +483,8 @@ static struct platform_hibernation_ops acpi_hibernation_ops = {
         .prepare = acpi_pm_prepare,
         .enter = acpi_hibernation_enter,
         .leave = acpi_hibernation_leave,
-        .pre_restore = acpi_pm_pre_restore,
-        .restore_cleanup = acpi_pm_restore_cleanup,
+        .pre_restore = acpi_pm_freeze,
+        .restore_cleanup = acpi_pm_thaw,
 };
 
 /**
@@ -510,12 +516,9 @@ static int acpi_hibernation_begin_old(void)
 
 static int acpi_hibernation_pre_snapshot_old(void)
 {
-        int error = acpi_pm_disable_gpes();
-
-        if (!error)
-                hibernate_nvs_save();
-
-        return error;
+        acpi_pm_freeze();
+        hibernate_nvs_save();
+        return 0;
 }
 
 /*
@@ -527,11 +530,11 @@ static struct platform_hibernation_ops acpi_hibernation_ops_old = {
         .end = acpi_pm_end,
         .pre_snapshot = acpi_hibernation_pre_snapshot_old,
         .finish = acpi_hibernation_finish,
-        .prepare = acpi_pm_disable_gpes,
+        .prepare = acpi_pm_freeze,
         .enter = acpi_hibernation_enter,
         .leave = acpi_hibernation_leave,
-        .pre_restore = acpi_pm_pre_restore,
-        .restore_cleanup = acpi_pm_restore_cleanup,
+        .pre_restore = acpi_pm_freeze,
+        .restore_cleanup = acpi_pm_thaw,
         .recover = acpi_pm_finish,
 };
 #endif /* CONFIG_HIBERNATION */