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Commit aaa93a61 authored by Lv Zheng's avatar Lv Zheng Committed by Rafael J. Wysocki
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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: default avatarLv Zheng <lv.zheng@intel.com>
Signed-off-by: default avatarBob Moore <robert.moore@intel.com>
Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
parent 4d946f79

drivers/acpi/acpica/dbexec.c

+10 −0
Original line number Original line Diff line number Diff line
@@ -370,7 +370,17 @@ acpi_db_execute(char *name, char **args, acpi_object_type * types, u32 flags) 
#ifdef ACPI_DEBUG_OUTPUT

#ifdef ACPI_DEBUG_OUTPUT

	u32 previous_allocations;

	u32 previous_allocations;

	u32 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 */

	/* Memory allocation tracking */





	previous_allocations = acpi_db_get_outstanding_allocations();

	previous_allocations = acpi_db_get_outstanding_allocations();