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ACPICA: Use low-level GPE enable during GPE block initialization 

The GPE block initialization code in acpi_ev_initialize_gpe_block()
uses acpi_set_gpe() to make sure that the GPEs with nonzero
runtime counter will remain enabled, but since it already has
a struct acpi_gpe_event_info object for each GPE, it might use
the low-level GPE enabling function, acpi_clear_and_enable_gpe(),
for this purpose.

To make that happen, move acpi_clear_and_enable_gpe() to
drivers/acpi/acpica/evgpe.c and rename it to acpi_ev_enable_gpe(),
modify the two existing users of it accordingly and modify
acpi_ev_initialize_gpe_block() to use it instead of acpi_set_gpe()
and to check its return value.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: Len Brown <len.brown@intel.com>
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Lin Ming <ming.m.lin@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Rafael J. Wysocki 2010-07-01 11:01:12 +08:00 committed by Len Brown
parent 3784730b02
commit 3bd741bd0d
4 changed files with 47 additions and 44 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/acpi/acpica/acevents.h
View File

@ -80,6 +80,8 @@ u32 acpi_ev_gpe_detect(struct acpi_gpe_xrupt_info *gpe_xrupt_list);
acpi_status
acpi_ev_update_gpe_enable_mask(struct acpi_gpe_event_info *gpe_event_info);
acpi_status acpi_ev_enable_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);

40
drivers/acpi/acpica/evgpe.c
View File

@ -94,6 +94,46 @@ acpi_ev_update_gpe_enable_mask(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: Clear the given GPE from stale events and enable it.
*
******************************************************************************/
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);
}
/* 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);
}
/*******************************************************************************
*

7
drivers/acpi/acpica/evgpeblk.c
View File

@ -508,10 +508,8 @@ acpi_ev_initialize_gpe_block(struct acpi_namespace_node *gpe_device,
* increment its reference counter.
*/
if (gpe_event_info->runtime_count) {
acpi_set_gpe(gpe_device, gpe_number,
ACPI_GPE_ENABLE);
gpe_enabled_count++;
continue;
status = acpi_ev_enable_gpe(gpe_event_info);
goto enabled;
}
if (gpe_event_info->flags & ACPI_GPE_CAN_WAKE) {
@ -530,6 +528,7 @@ acpi_ev_initialize_gpe_block(struct acpi_namespace_node *gpe_device,
/* Enable this GPE */
status = acpi_enable_gpe(gpe_device, gpe_number);
enabled:
if (ACPI_FAILURE(status)) {
ACPI_EXCEPTION((AE_INFO, status,
"Could not enable GPE 0x%02X",

42
drivers/acpi/acpica/evxfevnt.c
View File

@ -208,44 +208,6 @@ acpi_status acpi_enable_event(u32 event, u32 flags)
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
@ -287,7 +249,7 @@ acpi_status acpi_set_gpe(acpi_handle gpe_device, u32 gpe_number, u8 action)
switch (action) {
case ACPI_GPE_ENABLE:
status = acpi_clear_and_enable_gpe(gpe_event_info);
status = acpi_ev_enable_gpe(gpe_event_info);
break;
case ACPI_GPE_DISABLE:
@ -414,7 +376,7 @@ acpi_status acpi_enable_gpe(acpi_handle gpe_device, u32 gpe_number)
if (gpe_event_info->runtime_count == 1) {
status = acpi_ev_update_gpe_enable_mask(gpe_event_info);
if (ACPI_SUCCESS(status)) {
status = acpi_clear_and_enable_gpe(gpe_event_info);
status = acpi_ev_enable_gpe(gpe_event_info);
}
if (ACPI_FAILURE(status)) {
gpe_event_info->runtime_count--;