1 files changed, 60 insertions, 54 deletions

diff --git a/drivers/acpi/processor_idle.c b/drivers/acpi/processor_idle.c
index bbd066e7f854..5939e7f7d8e9 100644
--- a/drivers/acpi/processor_idle.c
+++ b/drivers/acpi/processor_idle.c
@@ -32,6 +32,7 @@
 #include <linux/module.h>
 #include <linux/init.h>
 #include <linux/cpufreq.h>
+#include <linux/slab.h>
 #include <linux/proc_fs.h>
 #include <linux/seq_file.h>
 #include <linux/acpi.h>
@@ -110,6 +111,14 @@ static struct dmi_system_id __cpuinitdata processor_power_dmi_table[] = {
           DMI_MATCH(DMI_BIOS_VENDOR,"Phoenix Technologies LTD"),
           DMI_MATCH(DMI_BIOS_VERSION,"SHE845M0.86C.0013.D.0302131307")},
          (void *)2},
+        { set_max_cstate, "Pavilion zv5000", {
+          DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
+          DMI_MATCH(DMI_PRODUCT_NAME,"Pavilion zv5000 (DS502A#ABA)")},
+         (void *)1},
+        { set_max_cstate, "Asus L8400B", {
+          DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."),
+          DMI_MATCH(DMI_PRODUCT_NAME,"L8400B series Notebook PC")},
+         (void *)1},
         {},
 };
 
@@ -164,7 +173,7 @@ static void lapic_timer_check_state(int state, struct acpi_processor *pr,
                 pr->power.timer_broadcast_on_state = state;
 }
 
-static void lapic_timer_propagate_broadcast(void *arg)
+static void __lapic_timer_propagate_broadcast(void *arg)
 {
         struct acpi_processor *pr = (struct acpi_processor *) arg;
         unsigned long reason;
@@ -175,6 +184,12 @@ static void lapic_timer_propagate_broadcast(void *arg)
         clockevents_notify(reason, &pr->id);
 }
 
+static void lapic_timer_propagate_broadcast(struct acpi_processor *pr)
+{
+        smp_call_function_single(pr->id, __lapic_timer_propagate_broadcast,
+                                 (void *)pr, 1);
+}
+
 /* Power(C) State timer broadcast control */
 static void lapic_timer_state_broadcast(struct acpi_processor *pr,
                                        struct acpi_processor_cx *cx,
@@ -299,6 +314,28 @@ static int acpi_processor_get_power_info_fadt(struct acpi_processor *pr)
         pr->power.states[ACPI_STATE_C2].latency = acpi_gbl_FADT.C2latency;
         pr->power.states[ACPI_STATE_C3].latency = acpi_gbl_FADT.C3latency;
 
+        /*
+         * FADT specified C2 latency must be less than or equal to
+         * 100 microseconds.
+         */
+        if (acpi_gbl_FADT.C2latency > ACPI_PROCESSOR_MAX_C2_LATENCY) {
+                ACPI_DEBUG_PRINT((ACPI_DB_INFO,
+                        "C2 latency too large [%d]\n", acpi_gbl_FADT.C2latency));
+                /* invalidate C2 */
+                pr->power.states[ACPI_STATE_C2].address = 0;
+        }
+
+        /*
+         * FADT supplied C3 latency must be less than or equal to
+         * 1000 microseconds.
+         */
+        if (acpi_gbl_FADT.C3latency > ACPI_PROCESSOR_MAX_C3_LATENCY) {
+                ACPI_DEBUG_PRINT((ACPI_DB_INFO,
+                        "C3 latency too large [%d]\n", acpi_gbl_FADT.C3latency));
+                /* invalidate C3 */
+                pr->power.states[ACPI_STATE_C3].address = 0;
+        }
+
         ACPI_DEBUG_PRINT((ACPI_DB_INFO,
                           "lvl2[0x%08x] lvl3[0x%08x]\n",
                           pr->power.states[ACPI_STATE_C2].address,
@@ -324,7 +361,7 @@ static int acpi_processor_get_power_info_default(struct acpi_processor *pr)
 static int acpi_processor_get_power_info_cst(struct acpi_processor *pr)
 {
         acpi_status status = 0;
-        acpi_integer count;
+        u64 count;
         int current_count;
         int i;
         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
@@ -488,33 +525,6 @@ static int acpi_processor_get_power_info_cst(struct acpi_processor *pr)
         return status;
 }
 
-static void acpi_processor_power_verify_c2(struct acpi_processor_cx *cx)
-{
-
-        if (!cx->address)
-                return;
-
-        /*
-         * C2 latency must be less than or equal to 100
-         * microseconds.
-         */
-        else if (cx->latency > ACPI_PROCESSOR_MAX_C2_LATENCY) {
-                ACPI_DEBUG_PRINT((ACPI_DB_INFO,
-                                  "latency too large [%d]\n", cx->latency));
-                return;
-        }
-
-        /*
-         * Otherwise we've met all of our C2 requirements.
-         * Normalize the C2 latency to expidite policy
-         */
-        cx->valid = 1;
-
-        cx->latency_ticks = cx->latency;
-
-        return;
-}
-
 static void acpi_processor_power_verify_c3(struct acpi_processor *pr,
                                            struct acpi_processor_cx *cx)
 {
@@ -526,16 +536,6 @@ static void acpi_processor_power_verify_c3(struct acpi_processor *pr,
                 return;
 
         /*
-         * C3 latency must be less than or equal to 1000
-         * microseconds.
-         */
-        else if (cx->latency > ACPI_PROCESSOR_MAX_C3_LATENCY) {
-                ACPI_DEBUG_PRINT((ACPI_DB_INFO,
-                                  "latency too large [%d]\n", cx->latency));
-                return;
-        }
-
-        /*
          * PIIX4 Erratum #18: We don't support C3 when Type-F (fast)
          * DMA transfers are used by any ISA device to avoid livelock.
          * Note that we could disable Type-F DMA (as recommended by
@@ -623,7 +623,10 @@ static int acpi_processor_power_verify(struct acpi_processor *pr)
                         break;
 
                 case ACPI_STATE_C2:
-                        acpi_processor_power_verify_c2(cx);
+                        if (!cx->address)
+                                break;
+                        cx->valid = 1; 
+                        cx->latency_ticks = cx->latency; /* Normalize latency */
                         break;
 
                 case ACPI_STATE_C3:
@@ -638,8 +641,7 @@ static int acpi_processor_power_verify(struct acpi_processor *pr)
                 working++;
         }
 
-        smp_call_function_single(pr->id, lapic_timer_propagate_broadcast,
-                                 pr, 1);
+        lapic_timer_propagate_broadcast(pr);
 
         return (working);
 }
@@ -879,12 +881,14 @@ static int acpi_idle_enter_simple(struct cpuidle_device *dev,
                 return(acpi_idle_enter_c1(dev, state));
 
         local_irq_disable();
-        current_thread_info()->status &= ~TS_POLLING;
-        /*
-         * TS_POLLING-cleared state must be visible before we test
-         * NEED_RESCHED:
-         */
-        smp_mb();
+        if (cx->entry_method != ACPI_CSTATE_FFH) {
+                current_thread_info()->status &= ~TS_POLLING;
+                /*
+                 * TS_POLLING-cleared state must be visible before we test
+                 * NEED_RESCHED:
+                 */
+                smp_mb();
+        }
 
         if (unlikely(need_resched())) {
                 current_thread_info()->status |= TS_POLLING;
@@ -964,12 +968,14 @@ static int acpi_idle_enter_bm(struct cpuidle_device *dev,
         }
 
         local_irq_disable();
-        current_thread_info()->status &= ~TS_POLLING;
-        /*
-         * TS_POLLING-cleared state must be visible before we test
-         * NEED_RESCHED:
-         */
-        smp_mb();
+        if (cx->entry_method != ACPI_CSTATE_FFH) {
+                current_thread_info()->status &= ~TS_POLLING;
+                /*
+                 * TS_POLLING-cleared state must be visible before we test
+                 * NEED_RESCHED:
+                 */
+                smp_mb();
+        }
 
         if (unlikely(need_resched())) {
                 current_thread_info()->status |= TS_POLLING;