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ACPICA: Debugger: Fix dead lock issue ocurred in single stepping mode 

ACPICA commit 35273add90da19cd8790fdb5735f52e3c9861684

When single step execution is not ended, executing another control methods
leads to dead locks around interpreter lock/namespace lock/method
serialization lock. So we should only allow one execution from the debugger
at same time. Lv Zheng.

Link: https://github.com/acpica/acpica/commit/35273add
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Lv Zheng 2015-10-19 10:26:02 +08:00 committed by Rafael J. Wysocki
parent 4d946f7970
commit aaa93a618b
1 changed files with 10 additions and 0 deletions
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10
drivers/acpi/acpica/dbexec.c
View File

@ -370,7 +370,17 @@ acpi_db_execute(char *name, char **args, acpi_object_type * types, u32 flags)
#ifdef ACPI_DEBUG_OUTPUT
u32 previous_allocations;
u32 allocations;
#endif
/*
* Allow one execution to be performed by debugger or single step
* execution will be dead locked by the interpreter mutexes.
*/
if (acpi_gbl_method_executing) {
acpi_os_printf("Only one debugger execution is allowed.\n");
return;
}
#ifdef ACPI_DEBUG_OUTPUT
/* Memory allocation tracking */
previous_allocations = acpi_db_get_outstanding_allocations();