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| author | Alexey Starikovskiy <alexey.y.starikovskiy@linux.intel.com> | 2007-02-15 21:12:23 (GMT) |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2007-02-15 21:13:16 (GMT) |
| commit | c0d127b56937c3e72c2b1819161d2f6718eee877 (patch) | |
| tree | 40ac0fd3a628685ce25d11d1b00360344279ec5b /include/acpi/acinterp.h | |
| parent | 724339d76d9407cd1a8ad32a9c1fdf64840cc51b (diff) | |
| download | linux-fsl-qoriq-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 'include/acpi/acinterp.h')
| -rw-r--r-- | include/acpi/acinterp.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/include/acpi/acinterp.h b/include/acpi/acinterp.h index ce7c9d6..73967c8 100644 --- a/include/acpi/acinterp.h +++ b/include/acpi/acinterp.h @@ -253,7 +253,8 @@ acpi_ex_release_mutex(union acpi_operand_object *obj_desc, void acpi_ex_release_all_mutexes(struct acpi_thread_state *thread); -void acpi_ex_unlink_mutex(union acpi_operand_object *obj_desc); +void acpi_ex_unlink_mutex(union acpi_operand_object *obj_desc, + struct acpi_thread_state *thread); /* * exprep - ACPI AML execution - prep utilities |