diff options
| author | Alexey Starikovskiy <alexey.y.starikovskiy@linux.intel.com> | 2007-02-15 16:12:23 -0500 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2007-02-15 16:13:16 -0500 |
| commit | c0d127b56937c3e72c2b1819161d2f6718eee877 (patch) | |
| tree | 40ac0fd3a628685ce25d11d1b00360344279ec5b /drivers/acpi/executer/exdump.c | |
| parent | 724339d76d9407cd1a8ad32a9c1fdf64840cc51b (diff) | |
ACPICA: fix AML mutex re-entrancy
ACPI AML supports "serialized" methods which are protected
by an implicit mutex. The mutex is re-entrant for that AML thread
to allow recursion.
However, Linux implements notify() by creating a new AML thread.
So for systems where notify() re-enters a serialized method,
deadlock results.
The fix is to use the Linux thread_id as the key to allowing
re-entrancy, not the AML thread pointer.
http://bugzilla.kernel.org/show_bug.cgi?id=5534
Signed-off-by: Alexey Starikovskiy <alexey.y.starikovskiy@linux.intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers/acpi/executer/exdump.c')
| -rw-r--r-- | drivers/acpi/executer/exdump.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/acpi/executer/exdump.c b/drivers/acpi/executer/exdump.c index 68d283fd60e..1a73c14df2c 100644 --- a/drivers/acpi/executer/exdump.c +++ b/drivers/acpi/executer/exdump.c @@ -134,7 +134,7 @@ static struct acpi_exdump_info acpi_ex_dump_method[8] = { static struct acpi_exdump_info acpi_ex_dump_mutex[5] = { {ACPI_EXD_INIT, ACPI_EXD_TABLE_SIZE(acpi_ex_dump_mutex), NULL}, {ACPI_EXD_UINT8, ACPI_EXD_OFFSET(mutex.sync_level), "Sync Level"}, - {ACPI_EXD_POINTER, ACPI_EXD_OFFSET(mutex.owner_thread), "Owner Thread"}, + {ACPI_EXD_POINTER, ACPI_EXD_OFFSET(mutex.owner_thread_id), "Owner Thread"}, {ACPI_EXD_UINT16, ACPI_EXD_OFFSET(mutex.acquisition_depth), "Acquire Depth"}, {ACPI_EXD_POINTER, ACPI_EXD_OFFSET(mutex.os_mutex), "OsMutex"} |