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ACPI: bugfix reporting of event handler status

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Introduce a new flag showing whether the event has an event handler/method.

For all the GPEs and Fixed Events,
 1. ACPI_EVENT_FLAG_HANDLE is cleared, it's an "invalid" ACPI event.
 2. Both ACPI_EVENT_FLAG_HANDLE and ACPI_EVENT_FLAG_DISABLE are set,
    it's "disabled".
 3. Both ACPI_EVENT_FLAG_HANDLE and ACPI_EVENT_FLAG_ENABLE are set,
    it's "enabled".
 4. Both ACPI_EVENT_FLAG_HANDLE and ACPI_EVENT_FLAG_WAKE_ENABLE are set,
    it's "wake_enabled".

Among other things, this prevents incorrect reporting of ACPI events
as being "invalid" when it's really just (temporarily) "disabled".

Signed-off-by: Zhang Rui <[email protected]>
Signed-off-by: David Brownell <[email protected]>
Signed-off-by: Len Brown <[email protected]>
This commit is contained in:
Zhang Rui 2008-10-27 14:01:02 -07:00 • committed by Len Brown
commit ed206fac87
4 changed files with 22 additions and 20 deletions
Download patch file Download diff file Expand all files Collapse all files

6
drivers/acpi/events/evxfevnt.c
View file

@ -521,6 +521,9 @@ acpi_status acpi_get_event_status(u32 event, acpi_event_status * event_status)
if (value)
*event_status |= ACPI_EVENT_FLAG_SET;
if (acpi_gbl_fixed_event_handlers[event].handler)
*event_status |= ACPI_EVENT_FLAG_HANDLE;
return_ACPI_STATUS(status);
}
@ -571,6 +574,9 @@ acpi_get_gpe_status(acpi_handle gpe_device,
status = acpi_hw_get_gpe_status(gpe_event_info, event_status);
if (gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK)
*event_status |= ACPI_EVENT_FLAG_HANDLE;
unlock_and_exit:
if (flags & ACPI_NOT_ISR) {
(void)acpi_ut_release_mutex(ACPI_MTX_EVENTS);

19
drivers/acpi/system.c
View file

@ -167,7 +167,6 @@ static int acpi_system_sysfs_init(void)
#define COUNT_ERROR 2 /* other */
#define NUM_COUNTERS_EXTRA 3
#define ACPI_EVENT_VALID 0x01
struct event_counter {
u32 count;
u32 flags;
@ -312,12 +311,6 @@ static int get_status(u32 index, acpi_event_status *status, acpi_handle *handle)
} else if (index < (num_gpes + ACPI_NUM_FIXED_EVENTS))
result = acpi_get_event_status(index - num_gpes, status);
/*
* sleep/power button GPE/Fixed Event is enabled after acpi_system_init,
* check the status at runtime and mark it as valid once it's enabled
*/
if (!result && (*status & ACPI_EVENT_FLAG_ENABLED))
all_counters[index].flags |= ACPI_EVENT_VALID;
end:
return result;
}
@ -346,12 +339,14 @@ static ssize_t counter_show(struct kobject *kobj,
if (result)
goto end;
if (!(all_counters[index].flags & ACPI_EVENT_VALID))
size += sprintf(buf + size, " invalid");
if (!(status & ACPI_EVENT_FLAG_HANDLE))
size += sprintf(buf + size, " invalid");
else if (status & ACPI_EVENT_FLAG_ENABLED)
size += sprintf(buf + size, " enable");
size += sprintf(buf + size, " enabled");
else if (status & ACPI_EVENT_FLAG_WAKE_ENABLED)
size += sprintf(buf + size, " wake_enabled");
else
size += sprintf(buf + size, " disable");
size += sprintf(buf + size, " disabled");
end:
size += sprintf(buf + size, "\n");
@ -385,7 +380,7 @@ static ssize_t counter_set(struct kobject *kobj,
if (result)
goto end;
if (!(all_counters[index].flags & ACPI_EVENT_VALID)) {
if (!(status & ACPI_EVENT_FLAG_HANDLE)) {
printk(KERN_WARNING PREFIX
"Can not change Invalid GPE/Fixed Event status\n");
return -EINVAL;