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ACPICA: Add auto-serialization support for ill-behaved control methods.

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This change adds support to automatically mark a control method as
"serialized" if the method creates any named objects. This will
positively prevent the method from being entered by more than one
thread and thus preventing a possible abort when an attempt is
made to create an object twice.

Implemented by parsing all non-serialize control methods at table
load time.

This feature is disabled by default and this patch also adds a new
Linux kernel parameter "acpi_auto_serialize" to allow this feature
to be turned on for a specific boot.

References: https://bugzilla.kernel.org/show_bug.cgi?id=52191
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Bob Moore
2014-03-24 14:49:00 +08:00
committed by Rafael J. Wysocki
parent e2b8ddcc6b
commit 22b5afce6a
13 changed files with 252 additions and 25 deletions
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5
drivers/acpi/acpica/nsinit.c
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@@ -111,9 +111,8 @@ acpi_status acpi_ns_initialize_objects(void)
info.object_count));
ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
"%u Control Methods found\n", info.method_count));
ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
"%u Op Regions found\n", info.op_region_count));
"%u Control Methods found\n%u Op Regions found\n",
info.method_count, info.op_region_count));
return_ACPI_STATUS(AE_OK);
}