kernel/acpi-debug-infinite-loop.patch

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2012-04-02 20:44:23 +00:00
--- linux-2.6.34.noarch/include/acpi/acconfig.h~ 2010-07-01 14:49:03.000000000 -0400
+++ linux-2.6.34.noarch/include/acpi/acconfig.h 2010-07-01 14:49:17.000000000 -0400
2010-07-29 23:46:31 +00:00
@@ -117,7 +117,7 @@
/* Maximum number of While() loop iterations before forced abort */
-#define ACPI_MAX_LOOP_ITERATIONS 0xFFFF
+#define ACPI_MAX_LOOP_ITERATIONS 0xFFFFFF
/* Maximum sleep allowed via Sleep() operator */
2011-03-28 19:15:32 +00:00
--- a/drivers/acpi/acpica/dscontrol.c
+++ b/drivers/acpi/acpica/dscontrol.c
@@ -212,6 +212,11 @@ acpi_ds_exec_end_control_op(struct acpi_walk_state * walk_state,
* loop does not implement a timeout.
*/
control_state->control.loop_count++;
+ if ((control_state->control.loop_count > 1) &&
+ (control_state->control.loop_count % 0xffff == 0))
+ printk("ACPI: While loop taking a really long time. loop_count=0x%x\n",
+ control_state->control.loop_count);
+
if (control_state->control.loop_count >
ACPI_MAX_LOOP_ITERATIONS) {
status = AE_AML_INFINITE_LOOP;