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ACPICA: Fix for access to deleted object <regression>

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Fixes problem introduced in 20080123, with fix for Unload operator.
Parse tree object can be already deleted; must use the opcode
within the WalkState.

ACPI: kmemcheck: Caught 16-bit read from freed memory
http://bugzilla.kernel.org/show_bug.cgi?id=10669

Signed-off-by: Lin Ming <ming.m.lin@intel.com>
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Bob Moore 2008-06-10 14:29:26 +08:00 committed by Len Brown
parent d52c79ace6
commit 8410565f54
1 changed files with 2 additions and 2 deletions
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4
drivers/acpi/parser/psargs.c
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@ -268,7 +268,7 @@ acpi_ps_get_next_namepath(struct acpi_walk_state *walk_state,
*/
if (ACPI_SUCCESS(status) &&
possible_method_call && (node->type == ACPI_TYPE_METHOD)) {
if (walk_state->op->common.aml_opcode == AML_UNLOAD_OP) {
if (walk_state->opcode == AML_UNLOAD_OP) {
/*
* acpi_ps_get_next_namestring has increased the AML pointer,
* so we need to restore the saved AML pointer for method call.
@ -691,7 +691,7 @@ acpi_ps_get_next_arg(struct acpi_walk_state *walk_state,
/* To support super_name arg of Unload */
if (walk_state->op->common.aml_opcode == AML_UNLOAD_OP) {
if (walk_state->opcode == AML_UNLOAD_OP) {
status =
acpi_ps_get_next_namepath(walk_state,
parser_state, arg,