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ACPICA: Introduce acpi_any_gpe_status_set()

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Introduce a new helper function, acpi_any_gpe_status_set(), for
checking the status bits of all enabled GPEs in one go.

It is needed to distinguish spurious SCIs from genuine ones when
deciding whether or not to wake up the system from suspend-to-idle.

Cc: 5.4+ <stable@vger.kernel.org> # 5.4+
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Rafael J. Wysocki
2020-02-11 17:52:32 +01:00
parent e3728b50cd
commit ea128834dd
4 changed files with 106 additions and 0 deletions
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71
drivers/acpi/acpica/hwgpe.c
View File

@@ -444,6 +444,53 @@ acpi_hw_enable_wakeup_gpe_block(struct acpi_gpe_xrupt_info *gpe_xrupt_info,
return (AE_OK);
}
/******************************************************************************
*
* FUNCTION: acpi_hw_get_gpe_block_status
*
* PARAMETERS: gpe_xrupt_info - GPE Interrupt info
* gpe_block - Gpe Block info
*
* RETURN: Success
*
* DESCRIPTION: Produce a combined GPE status bits mask for the given block.
*
******************************************************************************/
static acpi_status
acpi_hw_get_gpe_block_status(struct acpi_gpe_xrupt_info *gpe_xrupt_info,
struct acpi_gpe_block_info *gpe_block,
void *ret_ptr)
{
struct acpi_gpe_register_info *gpe_register_info;
u64 in_enable, in_status;
acpi_status status;
u8 *ret = ret_ptr;
u32 i;
/* Examine each GPE Register within the block */
for (i = 0; i < gpe_block->register_count; i++) {
gpe_register_info = &gpe_block->register_info[i];
status = acpi_hw_read(&in_enable,
&gpe_register_info->enable_address);
if (ACPI_FAILURE(status)) {
continue;
}
status = acpi_hw_read(&in_status,
&gpe_register_info->status_address);
if (ACPI_FAILURE(status)) {
continue;
}
*ret |= in_enable & in_status;
}
return (AE_OK);
}
/******************************************************************************
*
* FUNCTION: acpi_hw_disable_all_gpes
@@ -510,4 +557,28 @@ acpi_status acpi_hw_enable_all_wakeup_gpes(void)
return_ACPI_STATUS(status);
}
/******************************************************************************
*
* FUNCTION: acpi_hw_check_all_gpes
*
* PARAMETERS: None
*
* RETURN: Combined status of all GPEs
*
* DESCRIPTION: Check all enabled GPEs in all GPE blocks and return TRUE if the
* status bit is set for at least one of them of FALSE otherwise.
*
******************************************************************************/
u8 acpi_hw_check_all_gpes(void)
{
u8 ret = 0;
ACPI_FUNCTION_TRACE(acpi_hw_check_all_gpes);
(void)acpi_ev_walk_gpe_list(acpi_hw_get_gpe_block_status, &ret);
return (ret != 0);
}
#endif /* !ACPI_REDUCED_HARDWARE */