ACPI: Use GPE reference counting to support shared GPEs
To fix a bug and address the reviewers' comments regarding the ACPI
GPE refcounting patch, do the following additional changes:
o Remove the second argument of acpi_ev_enable_gpe(),
'write_to_hardware', because it is not necessary any more.
o Add the "bad parameter" test against 'type' in
acpi_enable_gpe() and acpi_disable_gpe().
o Make acpi_enable_gpe() only check 'status' for runtime GPEs if
acpi_ev_enable_gpe() was actually called.
o Make acpi_disable_gpe() return 'status' returned by
acpi_ev_disable_gpe() and fix a bug where ACPI_GPE_TYPE_WAKE
and ACPI_GPE_TYPE_RUNTIME were exchanged by mistake.
o Add comments explaining why acpi_set_gpe() is used by the ACPI EC
driver.
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
diff --git a/drivers/acpi/acpica/acevents.h b/drivers/acpi/acpica/acevents.h
index 197aa4f..4ced54f 100644
--- a/drivers/acpi/acpica/acevents.h
+++ b/drivers/acpi/acpica/acevents.h
@@ -78,9 +78,7 @@
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,
- u8 write_to_hardware);
+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);
diff --git a/drivers/acpi/acpica/evgpe.c b/drivers/acpi/acpica/evgpe.c
index 30ca3a3..0b45346 100644
--- a/drivers/acpi/acpica/evgpe.c
+++ b/drivers/acpi/acpica/evgpe.c
@@ -98,8 +98,6 @@
* FUNCTION: acpi_ev_enable_gpe
*
* PARAMETERS: gpe_event_info - GPE to enable
- * write_to_hardware - Enable now, or just mark data structs
- * (WAKE GPEs should be deferred)
*
* RETURN: Status
*
@@ -107,9 +105,7 @@
*
******************************************************************************/
-acpi_status
-acpi_ev_enable_gpe(struct acpi_gpe_event_info *gpe_event_info,
- u8 write_to_hardware)
+acpi_status acpi_ev_enable_gpe(struct acpi_gpe_event_info *gpe_event_info)
{
acpi_status status;
@@ -123,7 +119,7 @@
/* Mark wake-enabled or HW enable, or both */
- if (gpe_event_info->runtime_count && write_to_hardware) {
+ if (gpe_event_info->runtime_count) {
/* Clear the GPE (of stale events), then enable it */
status = acpi_hw_clear_gpe(gpe_event_info);
if (ACPI_FAILURE(status))
@@ -400,7 +396,7 @@
/* Set the GPE flags for return to enabled state */
- (void)acpi_ev_enable_gpe(gpe_event_info, FALSE);
+ (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
diff --git a/drivers/acpi/acpica/evxfevnt.c b/drivers/acpi/acpica/evxfevnt.c
index 1aea1a7..124c157 100644
--- a/drivers/acpi/acpica/evxfevnt.c
+++ b/drivers/acpi/acpica/evxfevnt.c
@@ -235,7 +235,7 @@
switch (action) {
case ACPI_GPE_ENABLE:
- status = acpi_ev_enable_gpe(gpe_event_info, TRUE);
+ status = acpi_ev_enable_gpe(gpe_event_info);
break;
case ACPI_GPE_DISABLE:
@@ -276,6 +276,9 @@
ACPI_FUNCTION_TRACE(acpi_enable_gpe);
+ if (type & ~ACPI_GPE_TYPE_WAKE_RUN)
+ return_ACPI_STATUS(AE_BAD_PARAMETER);
+
flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
/* Ensure that we have a valid GPE number */
@@ -287,11 +290,11 @@
}
if (type & ACPI_GPE_TYPE_RUNTIME) {
- if (++gpe_event_info->runtime_count == 1)
- status = acpi_ev_enable_gpe(gpe_event_info, TRUE);
-
- if (ACPI_FAILURE(status))
- gpe_event_info->runtime_count--;
+ if (++gpe_event_info->runtime_count == 1) {
+ status = acpi_ev_enable_gpe(gpe_event_info);
+ if (ACPI_FAILURE(status))
+ gpe_event_info->runtime_count--;
+ }
}
if (type & ACPI_GPE_TYPE_WAKE) {
@@ -335,6 +338,9 @@
ACPI_FUNCTION_TRACE(acpi_disable_gpe);
+ if (type & ~ACPI_GPE_TYPE_WAKE_RUN)
+ return_ACPI_STATUS(AE_BAD_PARAMETER);
+
flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
/* Ensure that we have a valid GPE number */
@@ -344,12 +350,12 @@
goto unlock_and_exit;
}
- if ((type & ACPI_GPE_TYPE_WAKE) && gpe_event_info->runtime_count) {
+ if ((type & ACPI_GPE_TYPE_RUNTIME) && gpe_event_info->runtime_count) {
if (--gpe_event_info->runtime_count == 0)
- acpi_ev_disable_gpe(gpe_event_info);
+ status = acpi_ev_disable_gpe(gpe_event_info);
}
- if ((type & ACPI_GPE_TYPE_RUNTIME) && gpe_event_info->wakeup_count) {
+ if ((type & ACPI_GPE_TYPE_WAKE) && gpe_event_info->wakeup_count) {
/*
* Wake-up GPEs are not enabled after leaving system sleep
* states, so we don't need to disable them here.