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| author | Alexey Starikovskiy <alexey.y.starikovskiy@linux.intel.com> | 2007-02-16 00:12:23 +0300 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2007-02-16 00:13:16 +0300 |
| commit | c0d127b56937c3e72c2b1819161d2f6718eee877 (patch) | |
| tree | 40ac0fd3a628685ce25d11d1b00360344279ec5b /drivers/acpi/utilities/utdelete.c | |
| parent | 724339d76d9407cd1a8ad32a9c1fdf64840cc51b (diff) | |
| download | linux-c0d127b56937c3e72c2b1819161d2f6718eee877.tar.xz | |
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/utilities/utdelete.c')
| -rw-r--r-- | drivers/acpi/utilities/utdelete.c | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/drivers/acpi/utilities/utdelete.c b/drivers/acpi/utilities/utdelete.c index f777cebdc46d..673a0caa4073 100644 --- a/drivers/acpi/utilities/utdelete.c +++ b/drivers/acpi/utilities/utdelete.c @@ -170,7 +170,6 @@ static void acpi_ut_delete_internal_obj(union acpi_operand_object *object) acpi_os_delete_mutex(object->mutex.os_mutex); acpi_gbl_global_lock_mutex = NULL; } else { - acpi_ex_unlink_mutex(object); acpi_os_delete_mutex(object->mutex.os_mutex); } break; |