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ACPICA: Interpreter: Emit warning for creation of a zero-length op region

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ACPICA commit 387c850c5d49d09d7c2e70b2711e584ad83956a1

Nothing can be done with such a region. Just emit a warning so as
not to abort a table load or running method.

Link: https://github.com/acpica/acpica/commit/387c850c
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Erik Schmauss <erik.schmauss@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Bob Moore 2019-02-15 13:36:07 -08:00 committed by Rafael J. Wysocki
parent aa342261bd
commit b3381bd902
1 changed files with 11 additions and 0 deletions
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11
drivers/acpi/acpica/dsopcode.c
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@ -356,6 +356,7 @@ acpi_ds_eval_region_operands(struct acpi_walk_state *walk_state,
union acpi_operand_object *operand_desc;
struct acpi_namespace_node *node;
union acpi_parse_object *next_op;
acpi_adr_space_type space_id;
ACPI_FUNCTION_TRACE_PTR(ds_eval_region_operands, op);
@ -368,6 +369,7 @@ acpi_ds_eval_region_operands(struct acpi_walk_state *walk_state,
/* next_op points to the op that holds the space_ID */
next_op = op->common.value.arg;
space_id = (acpi_adr_space_type)next_op->common.value.integer;
/* next_op points to address op */
@ -403,6 +405,15 @@ acpi_ds_eval_region_operands(struct acpi_walk_state *walk_state,
obj_desc->region.length = (u32) operand_desc->integer.value;
acpi_ut_remove_reference(operand_desc);
/* A zero-length operation region is unusable. Just warn */
if (!obj_desc->region.length
&& (space_id < ACPI_NUM_PREDEFINED_REGIONS)) {
ACPI_WARNING((AE_INFO,
"Operation Region [%4.4s] has zero length (SpaceId %X)",
node->name.ascii, space_id));
}
/*
* Get the address and save it
* (at top of stack - 1)