5 files changed, 29 insertions, 12 deletions

diff --git a/drivers/acpi/acpica/evxfevnt.c b/drivers/acpi/acpica/evxfevnt.c
index d97b8dce1668..18b3f1468b7d 100644
--- a/drivers/acpi/acpica/evxfevnt.c
+++ b/drivers/acpi/acpica/evxfevnt.c
@@ -70,6 +70,7 @@ acpi_ev_get_gpe_device(struct acpi_gpe_xrupt_info *gpe_xrupt_info,
 acpi_status acpi_enable(void)
 {
         acpi_status status;
+        int retry;
 
         ACPI_FUNCTION_TRACE(acpi_enable);
 
@@ -98,16 +99,18 @@ acpi_status acpi_enable(void)
 
         /* Sanity check that transition succeeded */
 
-        if (acpi_hw_get_mode() != ACPI_SYS_MODE_ACPI) {
-                ACPI_ERROR((AE_INFO,
-                            "Hardware did not enter ACPI mode"));
-                return_ACPI_STATUS(AE_NO_HARDWARE_RESPONSE);
+        for (retry = 0; retry < 30000; ++retry) {
+                if (acpi_hw_get_mode() == ACPI_SYS_MODE_ACPI) {
+                        if (retry != 0)
+                                ACPI_WARNING((AE_INFO,
+                                "Platform took > %d00 usec to enter ACPI mode", retry));
+                        return_ACPI_STATUS(AE_OK);
+                }
+                acpi_os_stall(100);     /* 100 usec */
         }
 
-        ACPI_DEBUG_PRINT((ACPI_DB_INIT,
-                          "Transition to ACPI mode successful\n"));
-
-        return_ACPI_STATUS(AE_OK);
+        ACPI_ERROR((AE_INFO, "Hardware did not enter ACPI mode"));
+        return_ACPI_STATUS(AE_NO_HARDWARE_RESPONSE);
 }
 
 ACPI_EXPORT_SYMBOL(acpi_enable)
diff --git a/drivers/acpi/battery.c b/drivers/acpi/battery.c
index 3026e3fa83ef..dc58402b0a17 100644
--- a/drivers/acpi/battery.c
+++ b/drivers/acpi/battery.c
@@ -868,9 +868,15 @@ static void acpi_battery_remove_fs(struct acpi_device *device)
 static void acpi_battery_notify(struct acpi_device *device, u32 event)
 {
         struct acpi_battery *battery = acpi_driver_data(device);
+#ifdef CONFIG_ACPI_SYSFS_POWER
+        struct device *old;
+#endif
 
         if (!battery)
                 return;
+#ifdef CONFIG_ACPI_SYSFS_POWER
+        old = battery->bat.dev;
+#endif
         acpi_battery_update(battery);
         acpi_bus_generate_proc_event(device, event,
                                      acpi_battery_present(battery));
@@ -879,7 +885,7 @@ static void acpi_battery_notify(struct acpi_device *device, u32 event)
                                         acpi_battery_present(battery));
 #ifdef CONFIG_ACPI_SYSFS_POWER
         /* acpi_battery_update could remove power_supply object */
-        if (battery->bat.dev)
+        if (old && battery->bat.dev)
                 power_supply_changed(&battery->bat);
 #endif
 }
diff --git a/drivers/acpi/blacklist.c b/drivers/acpi/blacklist.c
index 01381be05e96..2bb28b9d91c4 100644
--- a/drivers/acpi/blacklist.c
+++ b/drivers/acpi/blacklist.c
@@ -214,7 +214,7 @@ static struct dmi_system_id acpi_osi_dmi_table[] __initdata = {
         .ident = "Sony VGN-SR290J",
         .matches = {
                      DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"),
-                     DMI_MATCH(DMI_PRODUCT_NAME, "Sony VGN-SR290J"),
+                     DMI_MATCH(DMI_PRODUCT_NAME, "VGN-SR290J"),
                 },
         },
         {
diff --git a/drivers/acpi/processor_core.c b/drivers/acpi/processor_core.c
index 51284351418f..e9699aaed109 100644
--- a/drivers/acpi/processor_core.c
+++ b/drivers/acpi/processor_core.c
@@ -223,7 +223,7 @@ static bool processor_physically_present(acpi_handle handle)
         type = (acpi_type == ACPI_TYPE_DEVICE) ? 1 : 0;
         cpuid = acpi_get_cpuid(handle, type, acpi_id);
 
-        if (cpuid == -1)
+        if ((cpuid == -1) && (num_possible_cpus() > 1))
                 return false;
 
         return true;
diff --git a/drivers/acpi/processor_idle.c b/drivers/acpi/processor_idle.c
index b1b385692f46..e9a8026d39f0 100644
--- a/drivers/acpi/processor_idle.c
+++ b/drivers/acpi/processor_idle.c
@@ -76,14 +76,19 @@ static unsigned int max_cstate __read_mostly = ACPI_PROCESSOR_MAX_POWER;
 module_param(max_cstate, uint, 0000);
 static unsigned int nocst __read_mostly;
 module_param(nocst, uint, 0000);
+static int bm_check_disable __read_mostly;
+module_param(bm_check_disable, uint, 0000);
 
 static unsigned int latency_factor __read_mostly = 2;
 module_param(latency_factor, uint, 0644);
 
+#ifdef CONFIG_ACPI_PROCFS
 static u64 us_to_pm_timer_ticks(s64 t)
 {
         return div64_u64(t * PM_TIMER_FREQUENCY, 1000000);
 }
+#endif
+
 /*
  * IBM ThinkPad R40e crashes mysteriously when going into C2 or C3.
  * For now disable this. Probably a bug somewhere else.
@@ -763,6 +768,9 @@ static int acpi_idle_bm_check(void)
 {
         u32 bm_status = 0;
 
+        if (bm_check_disable)
+                return 0;
+
         acpi_read_bit_register(ACPI_BITREG_BUS_MASTER_STATUS, &bm_status);
         if (bm_status)
                 acpi_write_bit_register(ACPI_BITREG_BUS_MASTER_STATUS, 1);
@@ -947,7 +955,7 @@ static int acpi_idle_enter_bm(struct cpuidle_device *dev,
         if (acpi_idle_suspend)
                 return(acpi_idle_enter_c1(dev, state));
 
-        if (acpi_idle_bm_check()) {
+        if (!cx->bm_sts_skip && acpi_idle_bm_check()) {
                 if (dev->safe_state) {
                         dev->last_state = dev->safe_state;
                         return dev->safe_state->enter(dev, dev->safe_state);