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-rw-r--r--drivers/acpi/acpi_pad.c36
-rw-r--r--drivers/acpi/acpica/acconfig.h4
-rw-r--r--drivers/acpi/acpica/acevents.h4
-rw-r--r--drivers/acpi/acpica/acglobal.h8
-rw-r--r--drivers/acpi/acpica/achware.h6
-rw-r--r--drivers/acpi/acpica/evgpe.c115
-rw-r--r--drivers/acpi/acpica/evgpeblk.c14
-rw-r--r--drivers/acpi/acpica/evxface.c7
-rw-r--r--drivers/acpi/acpica/evxfevnt.c78
-rw-r--r--drivers/acpi/acpica/exsystem.c8
-rw-r--r--drivers/acpi/acpica/hwgpe.c94
-rw-r--r--drivers/acpi/acpica/hwvalid.c12
-rw-r--r--drivers/acpi/acpica/nsinit.c9
-rw-r--r--drivers/acpi/apei/apei-base.c1
-rw-r--r--drivers/acpi/apei/erst.c2
-rw-r--r--drivers/acpi/atomicio.c1
-rw-r--r--drivers/acpi/battery.c8
-rw-r--r--drivers/acpi/blacklist.c10
-rw-r--r--drivers/acpi/button.c4
-rw-r--r--drivers/acpi/fan.c3
-rw-r--r--drivers/acpi/processor_core.c2
-rw-r--r--drivers/acpi/processor_driver.c5
-rw-r--r--drivers/acpi/processor_idle.c10
-rw-r--r--drivers/acpi/sleep.c63
-rw-r--r--drivers/acpi/system.c6
-rw-r--r--drivers/acpi/wakeup.c20
26 files changed, 299 insertions, 231 deletions
diff --git a/drivers/acpi/acpi_pad.c b/drivers/acpi/acpi_pad.c
index d269a8f3329..446aced33af 100644
--- a/drivers/acpi/acpi_pad.c
+++ b/drivers/acpi/acpi_pad.c
@@ -46,6 +46,8 @@ static unsigned long power_saving_mwait_eax;
static unsigned char tsc_detected_unstable;
static unsigned char tsc_marked_unstable;
+static unsigned char lapic_detected_unstable;
+static unsigned char lapic_marked_unstable;
static void power_saving_mwait_init(void)
{
@@ -75,9 +77,6 @@ static void power_saving_mwait_init(void)
power_saving_mwait_eax = (highest_cstate << MWAIT_SUBSTATE_SIZE) |
(highest_subcstate - 1);
- for_each_online_cpu(i)
- clockevents_notify(CLOCK_EVT_NOTIFY_BROADCAST_ON, &i);
-
#if defined(CONFIG_GENERIC_TIME) && defined(CONFIG_X86)
switch (boot_cpu_data.x86_vendor) {
case X86_VENDOR_AMD:
@@ -86,13 +85,15 @@ static void power_saving_mwait_init(void)
* AMD Fam10h TSC will tick in all
* C/P/S0/S1 states when this bit is set.
*/
- if (boot_cpu_has(X86_FEATURE_NONSTOP_TSC))
- return;
-
- /*FALL THROUGH*/
+ if (!boot_cpu_has(X86_FEATURE_NONSTOP_TSC))
+ tsc_detected_unstable = 1;
+ if (!boot_cpu_has(X86_FEATURE_ARAT))
+ lapic_detected_unstable = 1;
+ break;
default:
- /* TSC could halt in idle */
+ /* TSC & LAPIC could halt in idle */
tsc_detected_unstable = 1;
+ lapic_detected_unstable = 1;
}
#endif
}
@@ -180,10 +181,20 @@ static int power_saving_thread(void *data)
mark_tsc_unstable("TSC halts in idle");
tsc_marked_unstable = 1;
}
+ if (lapic_detected_unstable && !lapic_marked_unstable) {
+ int i;
+ /* LAPIC could halt in idle, so notify users */
+ for_each_online_cpu(i)
+ clockevents_notify(
+ CLOCK_EVT_NOTIFY_BROADCAST_ON,
+ &i);
+ lapic_marked_unstable = 1;
+ }
local_irq_disable();
cpu = smp_processor_id();
- clockevents_notify(CLOCK_EVT_NOTIFY_BROADCAST_ENTER,
- &cpu);
+ if (lapic_marked_unstable)
+ clockevents_notify(
+ CLOCK_EVT_NOTIFY_BROADCAST_ENTER, &cpu);
stop_critical_timings();
__monitor((void *)&current_thread_info()->flags, 0, 0);
@@ -192,8 +203,9 @@ static int power_saving_thread(void *data)
__mwait(power_saving_mwait_eax, 1);
start_critical_timings();
- clockevents_notify(CLOCK_EVT_NOTIFY_BROADCAST_EXIT,
- &cpu);
+ if (lapic_marked_unstable)
+ clockevents_notify(
+ CLOCK_EVT_NOTIFY_BROADCAST_EXIT, &cpu);
local_irq_enable();
if (jiffies > expire_time) {
diff --git a/drivers/acpi/acpica/acconfig.h b/drivers/acpi/acpica/acconfig.h
index 33181ad350d..b17d8de9f6f 100644
--- a/drivers/acpi/acpica/acconfig.h
+++ b/drivers/acpi/acpica/acconfig.h
@@ -119,6 +119,10 @@
#define ACPI_MAX_LOOP_ITERATIONS 0xFFFF
+/* Maximum sleep allowed via Sleep() operator */
+
+#define ACPI_MAX_SLEEP 20000 /* Two seconds */
+
/******************************************************************************
*
* ACPI Specification constants (Do not change unless the specification changes)
diff --git a/drivers/acpi/acpica/acevents.h b/drivers/acpi/acpica/acevents.h
index 64d1e5c2d4a..c3f43daa8be 100644
--- a/drivers/acpi/acpica/acevents.h
+++ b/drivers/acpi/acpica/acevents.h
@@ -80,10 +80,6 @@ u32 acpi_ev_gpe_detect(struct acpi_gpe_xrupt_info *gpe_xrupt_list);
acpi_status
acpi_ev_update_gpe_enable_masks(struct acpi_gpe_event_info *gpe_event_info);
-acpi_status acpi_ev_enable_gpe(struct acpi_gpe_event_info *gpe_event_info);
-
-acpi_status acpi_ev_disable_gpe(struct acpi_gpe_event_info *gpe_event_info);
-
struct acpi_gpe_event_info *acpi_ev_get_gpe_event_info(acpi_handle gpe_device,
u32 gpe_number);
diff --git a/drivers/acpi/acpica/acglobal.h b/drivers/acpi/acpica/acglobal.h
index 9070f1fe8f1..899d68afc3c 100644
--- a/drivers/acpi/acpica/acglobal.h
+++ b/drivers/acpi/acpica/acglobal.h
@@ -125,6 +125,14 @@ u8 ACPI_INIT_GLOBAL(acpi_gbl_enable_aml_debug_object, FALSE);
*/
u8 ACPI_INIT_GLOBAL(acpi_gbl_copy_dsdt_locally, FALSE);
+/*
+ * Optionally truncate I/O addresses to 16 bits. Provides compatibility
+ * with other ACPI implementations. NOTE: During ACPICA initialization,
+ * this value is set to TRUE if any Windows OSI strings have been
+ * requested by the BIOS.
+ */
+u8 ACPI_INIT_GLOBAL(acpi_gbl_truncate_io_addresses, FALSE);
+
/* acpi_gbl_FADT is a local copy of the FADT, converted to a common format. */
struct acpi_table_fadt acpi_gbl_FADT;
diff --git a/drivers/acpi/acpica/achware.h b/drivers/acpi/acpica/achware.h
index 5900f135dc6..32391588e16 100644
--- a/drivers/acpi/acpica/achware.h
+++ b/drivers/acpi/acpica/achware.h
@@ -90,7 +90,11 @@ acpi_status acpi_hw_write_port(acpi_io_address address, u32 value, u32 width);
/*
* hwgpe - GPE support
*/
-acpi_status acpi_hw_low_disable_gpe(struct acpi_gpe_event_info *gpe_event_info);
+u32 acpi_hw_gpe_register_bit(struct acpi_gpe_event_info *gpe_event_info,
+ struct acpi_gpe_register_info *gpe_register_info);
+
+acpi_status
+acpi_hw_low_set_gpe(struct acpi_gpe_event_info *gpe_event_info, u8 action);
acpi_status
acpi_hw_write_gpe_enable_reg(struct acpi_gpe_event_info *gpe_event_info);
diff --git a/drivers/acpi/acpica/evgpe.c b/drivers/acpi/acpica/evgpe.c
index a221ad40416..7c2c336006a 100644
--- a/drivers/acpi/acpica/evgpe.c
+++ b/drivers/acpi/acpica/evgpe.c
@@ -69,7 +69,7 @@ acpi_status
acpi_ev_update_gpe_enable_masks(struct acpi_gpe_event_info *gpe_event_info)
{
struct acpi_gpe_register_info *gpe_register_info;
- u8 register_bit;
+ u32 register_bit;
ACPI_FUNCTION_TRACE(ev_update_gpe_enable_masks);
@@ -78,9 +78,8 @@ acpi_ev_update_gpe_enable_masks(struct acpi_gpe_event_info *gpe_event_info)
return_ACPI_STATUS(AE_NOT_EXIST);
}
- register_bit = (u8)
- (1 <<
- (gpe_event_info->gpe_number - gpe_register_info->base_gpe_number));
+ register_bit = acpi_hw_gpe_register_bit(gpe_event_info,
+ gpe_register_info);
/* Clear the wake/run bits up front */
@@ -100,106 +99,6 @@ acpi_ev_update_gpe_enable_masks(struct acpi_gpe_event_info *gpe_event_info)
return_ACPI_STATUS(AE_OK);
}
-/*******************************************************************************
- *
- * FUNCTION: acpi_ev_enable_gpe
- *
- * PARAMETERS: gpe_event_info - GPE to enable
- *
- * RETURN: Status
- *
- * DESCRIPTION: Hardware-enable a GPE. Always enables the GPE, regardless
- * of type or number of references.
- *
- * Note: The GPE lock should be already acquired when this function is called.
- *
- ******************************************************************************/
-
-acpi_status acpi_ev_enable_gpe(struct acpi_gpe_event_info *gpe_event_info)
-{
- acpi_status status;
-
-
- ACPI_FUNCTION_TRACE(ev_enable_gpe);
-
-
- /*
- * We will only allow a GPE to be enabled if it has either an
- * associated method (_Lxx/_Exx) or a handler. Otherwise, the
- * GPE will be immediately disabled by acpi_ev_gpe_dispatch the
- * first time it fires.
- */
- if (!(gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK)) {
- return_ACPI_STATUS(AE_NO_HANDLER);
- }
-
- /* Ensure the HW enable masks are current */
-
- status = acpi_ev_update_gpe_enable_masks(gpe_event_info);
- if (ACPI_FAILURE(status)) {
- return_ACPI_STATUS(status);
- }
-
- /* Clear the GPE (of stale events) */
-
- status = acpi_hw_clear_gpe(gpe_event_info);
- if (ACPI_FAILURE(status)) {
- return_ACPI_STATUS(status);
- }
-
- /* Enable the requested GPE */
-
- status = acpi_hw_write_gpe_enable_reg(gpe_event_info);
- return_ACPI_STATUS(status);
-}
-
-/*******************************************************************************
- *
- * FUNCTION: acpi_ev_disable_gpe
- *
- * PARAMETERS: gpe_event_info - GPE to disable
- *
- * RETURN: Status
- *
- * DESCRIPTION: Hardware-disable a GPE. Always disables the requested GPE,
- * regardless of the type or number of references.
- *
- * Note: The GPE lock should be already acquired when this function is called.
- *
- ******************************************************************************/
-
-acpi_status acpi_ev_disable_gpe(struct acpi_gpe_event_info *gpe_event_info)
-{
- acpi_status status;
-
- ACPI_FUNCTION_TRACE(ev_disable_gpe);
-
-
- /*
- * Note: Always disable the GPE, even if we think that that it is already
- * disabled. It is possible that the AML or some other code has enabled
- * the GPE behind our back.
- */
-
- /* Ensure the HW enable masks are current */
-
- status = acpi_ev_update_gpe_enable_masks(gpe_event_info);
- if (ACPI_FAILURE(status)) {
- return_ACPI_STATUS(status);
- }
-
- /*
- * Always H/W disable this GPE, even if we don't know the GPE type.
- * Simply clear the enable bit for this particular GPE, but do not
- * write out the current GPE enable mask since this may inadvertently
- * enable GPEs too early. An example is a rogue GPE that has arrived
- * during ACPICA initialization - possibly because AML or other code
- * has enabled the GPE.
- */
- status = acpi_hw_low_disable_gpe(gpe_event_info);
- return_ACPI_STATUS(status);
-}
-
/*******************************************************************************
*
@@ -451,10 +350,6 @@ static void ACPI_SYSTEM_XFACE acpi_ev_asynch_execute_gpe_method(void *context)
return_VOID;
}
- /* Update the GPE register masks for return to enabled state */
-
- (void)acpi_ev_update_gpe_enable_masks(gpe_event_info);
-
/*
* Take a snapshot of the GPE info for this level - we copy the info to
* prevent a race condition with remove_handler/remove_block.
@@ -607,7 +502,7 @@ acpi_ev_gpe_dispatch(struct acpi_gpe_event_info *gpe_event_info, u32 gpe_number)
* Disable the GPE, so it doesn't keep firing before the method has a
* chance to run (it runs asynchronously with interrupts enabled).
*/
- status = acpi_ev_disable_gpe(gpe_event_info);
+ status = acpi_hw_low_set_gpe(gpe_event_info, ACPI_GPE_DISABLE);
if (ACPI_FAILURE(status)) {
ACPI_EXCEPTION((AE_INFO, status,
"Unable to disable GPE[0x%2X]",
@@ -644,7 +539,7 @@ acpi_ev_gpe_dispatch(struct acpi_gpe_event_info *gpe_event_info, u32 gpe_number)
* Disable the GPE. The GPE will remain disabled a handler
* is installed or ACPICA is restarted.
*/
- status = acpi_ev_disable_gpe(gpe_event_info);
+ status = acpi_hw_low_set_gpe(gpe_event_info, ACPI_GPE_DISABLE);
if (ACPI_FAILURE(status)) {
ACPI_EXCEPTION((AE_INFO, status,
"Unable to disable GPE[0x%2X]",
diff --git a/drivers/acpi/acpica/evgpeblk.c b/drivers/acpi/acpica/evgpeblk.c
index 7c28f2d9fd3..341a38ce8aa 100644
--- a/drivers/acpi/acpica/evgpeblk.c
+++ b/drivers/acpi/acpica/evgpeblk.c
@@ -500,6 +500,19 @@ acpi_ev_initialize_gpe_block(struct acpi_namespace_node *gpe_device,
gpe_index = (i * ACPI_GPE_REGISTER_WIDTH) + j;
gpe_event_info = &gpe_block->event_info[gpe_index];
+ gpe_number = gpe_index + gpe_block->block_base_number;
+
+ /*
+ * If the GPE has already been enabled for runtime
+ * signaling, make sure it remains enabled, but do not
+ * increment its reference counter.
+ */
+ if (gpe_event_info->runtime_count) {
+ acpi_set_gpe(gpe_device, gpe_number,
+ ACPI_GPE_ENABLE);
+ gpe_enabled_count++;
+ continue;
+ }
if (gpe_event_info->flags & ACPI_GPE_CAN_WAKE) {
wake_gpe_count++;
@@ -516,7 +529,6 @@ acpi_ev_initialize_gpe_block(struct acpi_namespace_node *gpe_device,
/* Enable this GPE */
- gpe_number = gpe_index + gpe_block->block_base_number;
status = acpi_enable_gpe(gpe_device, gpe_number,
ACPI_GPE_TYPE_RUNTIME);
if (ACPI_FAILURE(status)) {
diff --git a/drivers/acpi/acpica/evxface.c b/drivers/acpi/acpica/evxface.c
index cc825023012..4a531cdf794 100644
--- a/drivers/acpi/acpica/evxface.c
+++ b/drivers/acpi/acpica/evxface.c
@@ -719,13 +719,6 @@ acpi_install_gpe_handler(acpi_handle gpe_device,
handler->context = context;
handler->method_node = gpe_event_info->dispatch.method_node;
- /* Disable the GPE before installing the handler */
-
- status = acpi_ev_disable_gpe(gpe_event_info);
- if (ACPI_FAILURE (status)) {
- goto unlock_and_exit;
- }
-
/* Install the handler */
flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
diff --git a/drivers/acpi/acpica/evxfevnt.c b/drivers/acpi/acpica/evxfevnt.c
index d5a5efc043b..18b3f1468b7 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)
@@ -210,6 +213,44 @@ ACPI_EXPORT_SYMBOL(acpi_enable_event)
/*******************************************************************************
*
+ * FUNCTION: acpi_clear_and_enable_gpe
+ *
+ * PARAMETERS: gpe_event_info - GPE to enable
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Clear the given GPE from stale events and enable it.
+ *
+ ******************************************************************************/
+static acpi_status
+acpi_clear_and_enable_gpe(struct acpi_gpe_event_info *gpe_event_info)
+{
+ acpi_status status;
+
+ /*
+ * We will only allow a GPE to be enabled if it has either an
+ * associated method (_Lxx/_Exx) or a handler. Otherwise, the
+ * GPE will be immediately disabled by acpi_ev_gpe_dispatch the
+ * first time it fires.
+ */
+ if (!(gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK)) {
+ return_ACPI_STATUS(AE_NO_HANDLER);
+ }
+
+ /* Clear the GPE (of stale events) */
+ status = acpi_hw_clear_gpe(gpe_event_info);
+ if (ACPI_FAILURE(status)) {
+ return_ACPI_STATUS(status);
+ }
+
+ /* Enable the requested GPE */
+ status = acpi_hw_low_set_gpe(gpe_event_info, ACPI_GPE_ENABLE);
+
+ return_ACPI_STATUS(status);
+}
+
+/*******************************************************************************
+ *
* FUNCTION: acpi_set_gpe
*
* PARAMETERS: gpe_device - Parent GPE Device. NULL for GPE0/GPE1
@@ -249,11 +290,11 @@ acpi_status acpi_set_gpe(acpi_handle gpe_device, u32 gpe_number, u8 action)
switch (action) {
case ACPI_GPE_ENABLE:
- status = acpi_ev_enable_gpe(gpe_event_info);
+ status = acpi_clear_and_enable_gpe(gpe_event_info);
break;
case ACPI_GPE_DISABLE:
- status = acpi_ev_disable_gpe(gpe_event_info);
+ status = acpi_hw_low_set_gpe(gpe_event_info, ACPI_GPE_DISABLE);
break;
default:
@@ -316,7 +357,11 @@ acpi_status acpi_enable_gpe(acpi_handle gpe_device, u32 gpe_number, u8 gpe_type)
gpe_event_info->runtime_count++;
if (gpe_event_info->runtime_count == 1) {
- status = acpi_ev_enable_gpe(gpe_event_info);
+ status = acpi_ev_update_gpe_enable_masks(gpe_event_info);
+ if (ACPI_SUCCESS(status)) {
+ status = acpi_clear_and_enable_gpe(gpe_event_info);
+ }
+
if (ACPI_FAILURE(status)) {
gpe_event_info->runtime_count--;
goto unlock_and_exit;
@@ -343,7 +388,7 @@ acpi_status acpi_enable_gpe(acpi_handle gpe_device, u32 gpe_number, u8 gpe_type)
*/
gpe_event_info->wakeup_count++;
if (gpe_event_info->wakeup_count == 1) {
- (void)acpi_ev_update_gpe_enable_masks(gpe_event_info);
+ status = acpi_ev_update_gpe_enable_masks(gpe_event_info);
}
}
@@ -403,7 +448,12 @@ acpi_status acpi_disable_gpe(acpi_handle gpe_device, u32 gpe_number, u8 gpe_type
gpe_event_info->runtime_count--;
if (!gpe_event_info->runtime_count) {
- status = acpi_ev_disable_gpe(gpe_event_info);
+ status = acpi_ev_update_gpe_enable_masks(gpe_event_info);
+ if (ACPI_SUCCESS(status)) {
+ status = acpi_hw_low_set_gpe(gpe_event_info,
+ ACPI_GPE_DISABLE);
+ }
+
if (ACPI_FAILURE(status)) {
gpe_event_info->runtime_count++;
goto unlock_and_exit;
@@ -424,7 +474,7 @@ acpi_status acpi_disable_gpe(acpi_handle gpe_device, u32 gpe_number, u8 gpe_type
gpe_event_info->wakeup_count--;
if (!gpe_event_info->wakeup_count) {
- (void)acpi_ev_update_gpe_enable_masks(gpe_event_info);
+ status = acpi_ev_update_gpe_enable_masks(gpe_event_info);
}
}
diff --git a/drivers/acpi/acpica/exsystem.c b/drivers/acpi/acpica/exsystem.c
index 6d32e09327f..675aaa91a77 100644
--- a/drivers/acpi/acpica/exsystem.c
+++ b/drivers/acpi/acpica/exsystem.c
@@ -201,6 +201,14 @@ acpi_status acpi_ex_system_do_sleep(u64 how_long)
acpi_ex_relinquish_interpreter();
+ /*
+ * For compatibility with other ACPI implementations and to prevent
+ * accidental deep sleeps, limit the sleep time to something reasonable.
+ */
+ if (how_long > ACPI_MAX_SLEEP) {
+ how_long = ACPI_MAX_SLEEP;
+ }
+
acpi_os_sleep(how_long);
/* And now we must get the interpreter again */
diff --git a/drivers/acpi/acpica/hwgpe.c b/drivers/acpi/acpica/hwgpe.c
index bd72319a38f..3450309c278 100644
--- a/drivers/acpi/acpica/hwgpe.c
+++ b/drivers/acpi/acpica/hwgpe.c
@@ -57,21 +57,47 @@ acpi_hw_enable_wakeup_gpe_block(struct acpi_gpe_xrupt_info *gpe_xrupt_info,
/******************************************************************************
*
- * FUNCTION: acpi_hw_low_disable_gpe
+ * FUNCTION: acpi_hw_gpe_register_bit
+ *
+ * PARAMETERS: gpe_event_info - Info block for the GPE
+ * gpe_register_info - Info block for the GPE register
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Compute GPE enable mask with one bit corresponding to the given
+ * GPE set.
+ *
+ ******************************************************************************/
+
+u32 acpi_hw_gpe_register_bit(struct acpi_gpe_event_info *gpe_event_info,
+ struct acpi_gpe_register_info *gpe_register_info)
+{
+ return (u32)1 << (gpe_event_info->gpe_number -
+ gpe_register_info->base_gpe_number);
+}
+
+/******************************************************************************
+ *
+ * FUNCTION: acpi_hw_low_set_gpe
*
* PARAMETERS: gpe_event_info - Info block for the GPE to be disabled
+ * action - Enable or disable
*
* RETURN: Status
*
- * DESCRIPTION: Disable a single GPE in the enable register.
+ * DESCRIPTION: Enable or disable a single GPE in its enable register.
*
******************************************************************************/
-acpi_status acpi_hw_low_disable_gpe(struct acpi_gpe_event_info *gpe_event_info)
+acpi_status
+acpi_hw_low_set_gpe(struct acpi_gpe_event_info *gpe_event_info, u8 action)
{
struct acpi_gpe_register_info *gpe_register_info;
acpi_status status;
u32 enable_mask;
+ u32 register_bit;
+
+ ACPI_FUNCTION_ENTRY();
/* Get the info block for the entire GPE register */
@@ -87,11 +113,27 @@ acpi_status acpi_hw_low_disable_gpe(struct acpi_gpe_event_info *gpe_event_info)
return (status);
}
- /* Clear just the bit that corresponds to this GPE */
+ /* Set ot clear just the bit that corresponds to this GPE */
- ACPI_CLEAR_BIT(enable_mask, ((u32)1 <<
- (gpe_event_info->gpe_number -
- gpe_register_info->base_gpe_number)));
+ register_bit = acpi_hw_gpe_register_bit(gpe_event_info,
+ gpe_register_info);
+ switch (action) {
+ case ACPI_GPE_COND_ENABLE:
+ if (!(register_bit & gpe_register_info->enable_for_run))
+ return (AE_BAD_PARAMETER);
+
+ case ACPI_GPE_ENABLE:
+ ACPI_SET_BIT(enable_mask, register_bit);
+ break;
+
+ case ACPI_GPE_DISABLE:
+ ACPI_CLEAR_BIT(enable_mask, register_bit);
+ break;
+
+ default:
+ ACPI_ERROR((AE_INFO, "Invalid action\n"));
+ return (AE_BAD_PARAMETER);
+ }
/* Write the updated enable mask */
@@ -116,23 +158,11 @@ acpi_status acpi_hw_low_disable_gpe(struct acpi_gpe_event_info *gpe_event_info)
acpi_status
acpi_hw_write_gpe_enable_reg(struct acpi_gpe_event_info * gpe_event_info)
{
- struct acpi_gpe_register_info *gpe_register_info;
acpi_status status;
ACPI_FUNCTION_ENTRY();
- /* Get the info block for the entire GPE register */
-
- gpe_register_info = gpe_event_info->register_info;
- if (!gpe_register_info) {
- return (AE_NOT_EXIST);
- }
-
- /* Write the entire GPE (runtime) enable register */
-
- status = acpi_hw_write(gpe_register_info->enable_for_run,
- &gpe_register_info->enable_address);
-
+ status = acpi_hw_low_set_gpe(gpe_event_info, ACPI_GPE_COND_ENABLE);
return (status);
}
@@ -150,21 +180,28 @@ acpi_hw_write_gpe_enable_reg(struct acpi_gpe_event_info * gpe_event_info)
acpi_status acpi_hw_clear_gpe(struct acpi_gpe_event_info * gpe_event_info)
{
+ struct acpi_gpe_register_info *gpe_register_info;
acpi_status status;
- u8 register_bit;
+ u32 register_bit;
ACPI_FUNCTION_ENTRY();
- register_bit = (u8)(1 <<
- (gpe_event_info->gpe_number -
- gpe_event_info->register_info->base_gpe_number));
+ /* Get the info block for the entire GPE register */
+
+ gpe_register_info = gpe_event_info->register_info;
+ if (!gpe_register_info) {
+ return (AE_NOT_EXIST);
+ }
+
+ register_bit = acpi_hw_gpe_register_bit(gpe_event_info,
+ gpe_register_info);
/*
* Write a one to the appropriate bit in the status register to
* clear this GPE.
*/
status = acpi_hw_write(register_bit,
- &gpe_event_info->register_info->status_address);
+ &gpe_register_info->status_address);
return (status);
}
@@ -187,7 +224,7 @@ acpi_hw_get_gpe_status(struct acpi_gpe_event_info * gpe_event_info,
acpi_event_status * event_status)
{
u32 in_byte;
- u8 register_bit;
+ u32 register_bit;
struct acpi_gpe_register_info *gpe_register_info;
acpi_status status;
acpi_event_status local_event_status = 0;
@@ -204,9 +241,8 @@ acpi_hw_get_gpe_status(struct acpi_gpe_event_info * gpe_event_info,
/* Get the register bitmask for this GPE */
- register_bit = (u8)(1 <<
- (gpe_event_info->gpe_number -
- gpe_event_info->register_info->base_gpe_number));
+ register_bit = acpi_hw_gpe_register_bit(gpe_event_info,
+ gpe_register_info);
/* GPE currently enabled? (enabled for runtime?) */
diff --git a/drivers/acpi/acpica/hwvalid.c b/drivers/acpi/acpica/hwvalid.c
index c10d587c164..e1d9c777b21 100644
--- a/drivers/acpi/acpica/hwvalid.c
+++ b/drivers/acpi/acpica/hwvalid.c
@@ -222,6 +222,12 @@ acpi_status acpi_hw_read_port(acpi_io_address address, u32 *value, u32 width)
u32 one_byte;
u32 i;
+ /* Truncate address to 16 bits if requested */
+
+ if (acpi_gbl_truncate_io_addresses) {
+ address &= ACPI_UINT16_MAX;
+ }
+
/* Validate the entire request and perform the I/O */
status = acpi_hw_validate_io_request(address, width);
@@ -279,6 +285,12 @@ acpi_status acpi_hw_write_port(acpi_io_address address, u32 value, u32 width)
acpi_status status;
u32 i;
+ /* Truncate address to 16 bits if requested */
+
+ if (acpi_gbl_truncate_io_addresses) {
+ address &= ACPI_UINT16_MAX;
+ }
+
/* Validate the entire request and perform the I/O */
status = acpi_hw_validate_io_request(address, width);
diff --git a/drivers/acpi/acpica/nsinit.c b/drivers/acpi/acpica/nsinit.c
index 9bd6f050f29..4e5272c313e 100644
--- a/drivers/acpi/acpica/nsinit.c
+++ b/drivers/acpi/acpica/nsinit.c
@@ -193,6 +193,15 @@ acpi_status acpi_ns_initialize_devices(void)
acpi_ns_init_one_device, NULL, &info,
NULL);
+ /*
+ * Any _OSI requests should be completed by now. If the BIOS has
+ * requested any Windows OSI strings, we will always truncate
+ * I/O addresses to 16 bits -- for Windows compatibility.
+ */
+ if (acpi_gbl_osi_data >= ACPI_OSI_WIN_2000) {
+ acpi_gbl_truncate_io_addresses = TRUE;
+ }
+
ACPI_FREE(info.evaluate_info);
if (ACPI_FAILURE(status)) {
goto error_exit;
diff --git a/drivers/acpi/apei/apei-base.c b/drivers/acpi/apei/apei-base.c
index db3946e9c66..216e1e948ff 100644
--- a/drivers/acpi/apei/apei-base.c
+++ b/drivers/acpi/apei/apei-base.c
@@ -34,6 +34,7 @@
#include <linux/module.h>
#include <linux/init.h>
#include <linux/acpi.h>
+#include <linux/slab.h>
#include <linux/io.h>
#include <linux/kref.h>
#include <linux/rculist.h>
diff --git a/drivers/acpi/apei/erst.c b/drivers/acpi/apei/erst.c
index 2ebc3911550..864dd46c346 100644
--- a/drivers/acpi/apei/erst.c
+++ b/drivers/acpi/apei/erst.c
@@ -781,7 +781,7 @@ static int __init erst_init(void)
status = acpi_get_table(ACPI_SIG_ERST, 0,
(struct acpi_table_header **)&erst_tab);
if (status == AE_NOT_FOUND) {
- pr_err(ERST_PFX "Table is not found!\n");
+ pr_info(ERST_PFX "Table is not found!\n");
goto err;
} else if (ACPI_FAILURE(status)) {
const char *msg = acpi_format_exception(status);
diff --git a/drivers/acpi/atomicio.c b/drivers/acpi/atomicio.c
index 814b1924961..8f8bd736d4f 100644
--- a/drivers/acpi/atomicio.c
+++ b/drivers/acpi/atomicio.c
@@ -31,6 +31,7 @@
#include <linux/kref.h>
#include <linux/rculist.h>
#include <linux/interrupt.h>
+#include <linux/slab.h>
#include <acpi/atomicio.h>
#define ACPI_PFX "ACPI: "
diff --git a/drivers/acpi/battery.c b/drivers/acpi/battery.c
index 3026e3fa83e..dc58402b0a1 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 2815df66f6f..2bb28b9d91c 100644
--- a/drivers/acpi/blacklist.c
+++ b/drivers/acpi/blacklist.c
@@ -214,7 +214,15 @@ 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"),
+ },
+ },
+ {
+ .callback = dmi_disable_osi_vista,
+ .ident = "VGN-NS50B_L",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "VGN-NS50B_L"),
},
},
{
diff --git a/drivers/acpi/button.c b/drivers/acpi/button.c
index fd51c4ab482..7d857dabdde 100644
--- a/drivers/acpi/button.c
+++ b/drivers/acpi/button.c
@@ -425,7 +425,7 @@ static int acpi_button_add(struct acpi_device *device)
/* Button's GPE is run-wake GPE */
acpi_enable_gpe(device->wakeup.gpe_device,
device->wakeup.gpe_number,
- ACPI_GPE_TYPE_WAKE_RUN);
+ ACPI_GPE_TYPE_RUNTIME);
device->wakeup.run_wake_count++;
device->wakeup.state.enabled = 1;
}
@@ -449,7 +449,7 @@ static int acpi_button_remove(struct acpi_device *device, int type)
if (device->wakeup.flags.valid) {
acpi_disable_gpe(device->wakeup.gpe_device,
device->wakeup.gpe_number,
- ACPI_GPE_TYPE_WAKE_RUN);
+ ACPI_GPE_TYPE_RUNTIME);
device->wakeup.run_wake_count--;
device->wakeup.state.enabled = 0;
}
diff --git a/drivers/acpi/fan.c b/drivers/acpi/fan.c
index acf2ab24984..8a3b840c0bb 100644
--- a/drivers/acpi/fan.c
+++ b/drivers/acpi/fan.c
@@ -347,7 +347,6 @@ static int __init acpi_fan_init(void)
{
int result = 0;
-
#ifdef CONFIG_ACPI_PROCFS
acpi_fan_dir = proc_mkdir(ACPI_FAN_CLASS, acpi_root_dir);
if (!acpi_fan_dir)
@@ -356,7 +355,9 @@ static int __init acpi_fan_init(void)
result = acpi_bus_register_driver(&acpi_fan_driver);
if (result < 0) {
+#ifdef CONFIG_ACPI_PROCFS
remove_proc_entry(ACPI_FAN_CLASS, acpi_root_dir);
+#endif
return -ENODEV;
}
diff --git a/drivers/acpi/processor_core.c b/drivers/acpi/processor_core.c
index 51284351418..e9699aaed10 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_driver.c b/drivers/acpi/processor_driver.c
index b1034a9ada4..38ea0cc6dc4 100644
--- a/drivers/acpi/processor_driver.c
+++ b/drivers/acpi/processor_driver.c
@@ -581,6 +581,11 @@ static int __cpuinit acpi_processor_add(struct acpi_device *device)
return 0;
}
+#ifdef CONFIG_SMP
+ if (pr->id >= setup_max_cpus && pr->id != 0)
+ return 0;
+#endif
+
BUG_ON((pr->id >= nr_cpu_ids) || (pr->id < 0));
/*
diff --git a/drivers/acpi/processor_idle.c b/drivers/acpi/processor_idle.c
index b1b385692f4..e9a8026d39f 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);
diff --git a/drivers/acpi/sleep.c b/drivers/acpi/sleep.c
index 3fb4bdea7e0..2862c781b37 100644
--- a/drivers/acpi/sleep.c
+++ b/drivers/acpi/sleep.c
@@ -82,6 +82,20 @@ static int acpi_sleep_prepare(u32 acpi_state)
static u32 acpi_target_sleep_state = ACPI_STATE_S0;
/*
+ * The ACPI specification wants us to save NVS memory regions during hibernation
+ * and to restore them during the subsequent resume. Windows does that also for
+ * suspend to RAM. However, it is known that this mechanism does not work on
+ * all machines, so we allow the user to disable it with the help of the
+ * 'acpi_sleep=nonvs' kernel command line option.
+ */
+static bool nvs_nosave;
+
+void __init acpi_nvs_nosave(void)
+{
+ nvs_nosave = true;
+}
+
+/*
* ACPI 1.0 wants us to execute _PTS before suspending devices, so we allow the
* user to request that behavior by using the 'acpi_old_suspend_ordering'
* kernel command line option that causes the following variable to be set.
@@ -114,6 +128,8 @@ static int __acpi_pm_prepare(void)
{
int error = acpi_sleep_prepare(acpi_target_sleep_state);
+ suspend_nvs_save();
+
if (error)
acpi_target_sleep_state = ACPI_STATE_S0;
return error;
@@ -143,6 +159,9 @@ static void acpi_pm_finish(void)
{
u32 acpi_state = acpi_target_sleep_state;
+ suspend_nvs_free();
+ acpi_ec_unblock_transactions();
+
if (acpi_state == ACPI_STATE_S0)
return;
@@ -192,6 +211,10 @@ static int acpi_suspend_begin(suspend_state_t pm_state)
u32 acpi_state = acpi_suspend_states[pm_state];
int error = 0;
+ error = nvs_nosave ? 0 : suspend_nvs_alloc();
+ if (error)
+ return error;
+
if (sleep_states[acpi_state]) {
acpi_target_sleep_state = acpi_state;
acpi_sleep_tts_switch(acpi_target_sleep_state);
@@ -269,12 +292,13 @@ static int acpi_suspend_enter(suspend_state_t pm_state)
if (acpi_state == ACPI_STATE_S3)
acpi_restore_state_mem();
+ suspend_nvs_restore();
+
return ACPI_SUCCESS(status) ? 0 : -EFAULT;
}
static void acpi_suspend_finish(void)
{
- acpi_ec_unblock_transactions();
acpi_pm_finish();
}
@@ -377,20 +401,6 @@ static struct dmi_system_id __initdata acpisleep_dmi_table[] = {
#endif /* CONFIG_SUSPEND */
#ifdef CONFIG_HIBERNATION
-/*
- * The ACPI specification wants us to save NVS memory regions during hibernation
- * and to restore them during the subsequent resume. However, it is not certain
- * if this mechanism is going to work on all machines, so we allow the user to
- * disable this mechanism using the 'acpi_sleep=s4_nonvs' kernel command line
- * option.
- */
-static bool s4_no_nvs;
-
-void __init acpi_s4_no_nvs(void)
-{
- s4_no_nvs = true;
-}
-
static unsigned long s4_hardware_signature;
static struct acpi_table_facs *facs;
static bool nosigcheck;
@@ -404,7 +414,7 @@ static int acpi_hibernation_begin(void)
{
int error;
- error = s4_no_nvs ? 0 : hibernate_nvs_alloc();
+ error = nvs_nosave ? 0 : suspend_nvs_alloc();
if (!error) {
acpi_target_sleep_state = ACPI_STATE_S4;
acpi_sleep_tts_switch(acpi_target_sleep_state);
@@ -418,7 +428,7 @@ static int acpi_hibernation_pre_snapshot(void)
int error = acpi_pm_prepare();
if (!error)
- hibernate_nvs_save();
+ suspend_nvs_save();
return error;
}
@@ -441,13 +451,6 @@ static int acpi_hibernation_enter(void)
return ACPI_SUCCESS(status) ? 0 : -EFAULT;
}
-static void acpi_hibernation_finish(void)
-{
- hibernate_nvs_free();
- acpi_ec_unblock_transactions();
- acpi_pm_finish();
-}
-
static void acpi_hibernation_leave(void)
{
/*
@@ -464,7 +467,7 @@ static void acpi_hibernation_leave(void)
panic("ACPI S4 hardware signature mismatch");
}
/* Restore the NVS memory area */
- hibernate_nvs_restore();
+ suspend_nvs_restore();
/* Allow EC transactions to happen. */
acpi_ec_unblock_transactions_early();
}
@@ -479,7 +482,7 @@ static struct platform_hibernation_ops acpi_hibernation_ops = {
.begin = acpi_hibernation_begin,
.end = acpi_pm_end,
.pre_snapshot = acpi_hibernation_pre_snapshot,
- .finish = acpi_hibernation_finish,
+ .finish = acpi_pm_finish,
.prepare = acpi_pm_prepare,
.enter = acpi_hibernation_enter,
.leave = acpi_hibernation_leave,
@@ -506,8 +509,8 @@ static int acpi_hibernation_begin_old(void)
error = acpi_sleep_prepare(ACPI_STATE_S4);
if (!error) {
- if (!s4_no_nvs)
- error = hibernate_nvs_alloc();
+ if (!nvs_nosave)
+ error = suspend_nvs_alloc();
if (!error)
acpi_target_sleep_state = ACPI_STATE_S4;
}
@@ -517,7 +520,7 @@ static int acpi_hibernation_begin_old(void)
static int acpi_hibernation_pre_snapshot_old(void)
{
acpi_pm_freeze();
- hibernate_nvs_save();
+ suspend_nvs_save();
return 0;
}
@@ -529,8 +532,8 @@ static struct platform_hibernation_ops acpi_hibernation_ops_old = {
.begin = acpi_hibernation_begin_old,
.end = acpi_pm_end,
.pre_snapshot = acpi_hibernation_pre_snapshot_old,
- .finish = acpi_hibernation_finish,
.prepare = acpi_pm_freeze,
+ .finish = acpi_pm_finish,
.enter = acpi_hibernation_enter,
.leave = acpi_hibernation_leave,
.pre_restore = acpi_pm_freeze,
diff --git a/drivers/acpi/system.c b/drivers/acpi/system.c
index c79e789ed03..f8db50a0941 100644
--- a/drivers/acpi/system.c
+++ b/drivers/acpi/system.c
@@ -388,10 +388,12 @@ static ssize_t counter_set(struct kobject *kobj,
if (index < num_gpes) {
if (!strcmp(buf, "disable\n") &&
(status & ACPI_EVENT_FLAG_ENABLED))
- result = acpi_set_gpe(handle, index, ACPI_GPE_DISABLE);
+ result = acpi_disable_gpe(handle, index,
+ ACPI_GPE_TYPE_RUNTIME);
else if (!strcmp(buf, "enable\n") &&
!(status & ACPI_EVENT_FLAG_ENABLED))
- result = acpi_set_gpe(handle, index, ACPI_GPE_ENABLE);
+ result = acpi_enable_gpe(handle, index,
+ ACPI_GPE_TYPE_RUNTIME);
else if (!strcmp(buf, "clear\n") &&
(status & ACPI_EVENT_FLAG_SET))
result = acpi_clear_gpe(handle, index);
diff --git a/drivers/acpi/wakeup.c b/drivers/acpi/wakeup.c
index 4b9d339a6e2..388747a7ef4 100644
--- a/drivers/acpi/wakeup.c
+++ b/drivers/acpi/wakeup.c
@@ -64,16 +64,13 @@ void acpi_enable_wakeup_device(u8 sleep_state)
struct acpi_device *dev =
container_of(node, struct acpi_device, wakeup_list);
- if (!dev->wakeup.flags.valid)
- continue;
-
- if ((!dev->wakeup.state.enabled && !dev->wakeup.prepare_count)
+ if (!dev->wakeup.flags.valid || !dev->wakeup.state.enabled
|| sleep_state > (u32) dev->wakeup.sleep_state)
continue;
/* The wake-up power should have been enabled already. */
- acpi_set_gpe(dev->wakeup.gpe_device, dev->wakeup.gpe_number,
- ACPI_GPE_ENABLE);
+ acpi_enable_gpe(dev->wakeup.gpe_device, dev->wakeup.gpe_number,
+ ACPI_GPE_TYPE_WAKE);
}
}
@@ -96,6 +93,8 @@ void acpi_disable_wakeup_device(u8 sleep_state)
|| (sleep_state > (u32) dev->wakeup.sleep_state))
continue;
+ acpi_disable_gpe(dev->wakeup.gpe_device, dev->wakeup.gpe_number,
+ ACPI_GPE_TYPE_WAKE);
acpi_disable_wakeup_device_power(dev);
}
}
@@ -109,13 +108,8 @@ int __init acpi_wakeup_device_init(void)
struct acpi_device *dev = container_of(node,
struct acpi_device,
wakeup_list);
- /* In case user doesn't load button driver */
- if (!dev->wakeup.flags.always_enabled ||
- dev->wakeup.state.enabled)
- continue;
- acpi_enable_gpe(dev->wakeup.gpe_device, dev->wakeup.gpe_number,
- ACPI_GPE_TYPE_WAKE);
- dev->wakeup.state.enabled = 1;
+ if (dev->wakeup.flags.always_enabled)
+ dev->wakeup.state.enabled = 1;
}
mutex_unlock(&acpi_device_lock);
return 0;