diff options
| author | Lv Zheng <lv.zheng@intel.com> | 2015-10-19 04:26:02 +0200 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2015-10-22 02:05:06 +0200 |
| commit | aaa93a618b3f1a94f70b09f9e22481d4a51976d0 (patch) | |
| tree | 5f4dd43bf8cb1c5b22650dcf341116a67d1c8c19 /drivers/acpi | |
| parent | ACPI: Enable build of AML interpreter debugger (diff) | |
| download | linux-aaa93a618b3f1a94f70b09f9e22481d4a51976d0.tar.xz linux-aaa93a618b3f1a94f70b09f9e22481d4a51976d0.zip | |
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>
Diffstat (limited to 'drivers/acpi')
| -rw-r--r-- | drivers/acpi/acpica/dbexec.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/acpi/acpica/dbexec.c b/drivers/acpi/acpica/dbexec.c index 258e6157c658..d713e2df65b9 100644 --- a/drivers/acpi/acpica/dbexec.c +++ b/drivers/acpi/acpica/dbexec.c @@ -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(); |