On Saturday 12 April 2008, Len Brown wrote:
> From: Bob Moore <robert.moore@xxxxxxxxx>
>
> Implemented another change to eliminate/suppress spurious or
> stray GPEs. The AcpiEvDisableGpe function will now disable GPEs
> that are neither enabled nor disabled -- meaning that the GPE is
> unknown to the system. This will prevent future interrupts from
> that GPE. (Zhang Rui) BZ 6217
>
> Signed-off-by: Bob Moore <robert.moore@xxxxxxxxx>
> Signed-off-by: Alexey Starikovskiy <astarikovskiy@xxxxxxx>
> Signed-off-by: Len Brown <len.brown@xxxxxxxxx>
> ---
> drivers/acpi/events/evgpe.c | 9 ++++++++-
> 1 files changed, 8 insertions(+), 1 deletions(-)
>
> diff --git a/drivers/acpi/events/evgpe.c b/drivers/acpi/events/evgpe.c
> index 897baed..6940f5d 100644
> --- a/drivers/acpi/events/evgpe.c
> +++ b/drivers/acpi/events/evgpe.c
> @@ -250,7 +250,14 @@ acpi_status acpi_ev_disable_gpe(struct acpi_gpe_event_info *gpe_event_info)
>
> ACPI_FUNCTION_TRACE(ev_disable_gpe);
>
> - if (!(gpe_event_info->flags & ACPI_GPE_ENABLE_MASK)) {
> + /*
> + * Ignore this if the GPE is valid and not enabled.
> + *
> + * Flags is only zero if GPE is neither enabled or disabled -- it may
> + * be a spurious or stray GPE -- disable it in the default case below.
> + */
> + if (gpe_event_info->flags &&
> + (!(gpe_event_info->flags & ACPI_GPE_ENABLE_MASK))) {
> return_ACPI_STATUS(AE_OK);
> }
>
When applied to 2.6.25, the patch above causes ACPI Error messages below on my T61.
Certainly this is a case of the EC getting an interrupt (GPE x02) before it has initialized.
Perhaps it breaks the call of acpi_install_gpe_handler() to acpi_ev_disable_gpe()?
-Len
PCI: Using MMCONFIG at f0000000 - f3ffffff
PCI: Using configuration type 1
evgpeblk-0956 [00] ev_create_gpe_block : GPE 00 to 1F [_GPE] 4 regs on int 0x9
+ACPI Error (evregion-0316): No handler for Region [ECOR] (ffff81007d35dda0) [EmbeddedControl] [20070126]
+ACPI Error (exfldio-0289): Region EmbeddedControl(3) has no handler [20070126]
+ACPI Error (psparse-0537): Method parse/execution failed [\_SB_.PCI0.LPC_.EC__.AC__._PSR] (Node ffff81007d364ab0), AE_NOT_EXIST
+ACPI Error (psparse-0537): Method parse/execution failed [\_SB_.PCI0.LPC_.EC__.HKEY.CKC4] (Node ffff81007d364f48), AE_NOT_EXIST
+ACPI Error (psparse-0537): Method parse/execution failed [\_GPE._L02] (Node ffff81007d376420), AE_NOT_EXIST
+ACPI Exception (evgpe-0584): AE_NOT_EXIST, while evaluating GPE method [_L02] [20070126]
evgpeblk-1052 [00] ev_initialize_gpe_bloc: Found 9 Wake, Enabled 3 Runtime GPEs in this block
ACPI: EC: EC description table is found, configuring boot EC
-ACPI: EC: non-query interrupt received, switching to interrupt mode
-Completing Region/Field/Buffer/Package initialization:........................................................................................................................
......................................................................................................................................................................
-Initialized 29/33 Regions 138/138 Fields 64/64 Buffers 55/72 Packages (1888 nodes)
+Completing Region/Field/Buffer/Package initialization:........................................................................................................................
.......................................................................................................................................................................
+Initialized 30/33 Regions 138/138 Fields 64/64 Buffers 55/72 Packages (1888 nodes)
Initializing Device/Processor/Thermal objects by executing _INI methods:.<5>ACPI: BIOS _OSI(Linux) query honored via DMI
+ACPI: EC: non-query interrupt received, switching to interrupt mode
.......
Executed 8 _INI methods requiring 2 _STA executions (examined 88 objects)
ACPI: Interpreter enabled
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