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| author | Bob Moore <robert.moore@intel.com> | 2008-11-12 15:15:29 +0800 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2008-12-29 22:38:36 -0500 |
| commit | fc37445733aeae4fd1a20385850620354263b1d5 (patch) | |
| tree | a989d6bf8dcc2011f25e365532c3855a48f11c62 /include/acpi/acconfig.h | |
| parent | 96411a630412f057d365aa1e9de7d23c069d627a (diff) | |
| download | linux-3.10-fc37445733aeae4fd1a20385850620354263b1d5.tar.gz linux-3.10-fc37445733aeae4fd1a20385850620354263b1d5.tar.bz2 linux-3.10-fc37445733aeae4fd1a20385850620354263b1d5.zip | |
ACPICA: Add a mechanism to escape infinite AML While() loops
Add a loop counter to force exit from AML While loops if the
count becomes too large. This can occur in poorly written AML
when the hardware does not respond within a while loop and the
loop does not implement a timeout. The maximum loop count is
configurable. A new exception code is returned when a loop is
broken, AE_AML_INFINITE_LOOP. Bob Moore, Alexey Starikovskiy.
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Lin Ming <ming.m.lin@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'include/acpi/acconfig.h')
| -rw-r--r-- | include/acpi/acconfig.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/include/acpi/acconfig.h b/include/acpi/acconfig.h index 29feee27f0e..e50fe715746 100644 --- a/include/acpi/acconfig.h +++ b/include/acpi/acconfig.h @@ -119,6 +119,10 @@ #define ACPI_ROOT_TABLE_SIZE_INCREMENT 4 +/* Maximum number of While() loop iterations before forced abort */ + +#define ACPI_MAX_LOOP_ITERATIONS 0xFFFF + /****************************************************************************** * * ACPI Specification constants (Do not change unless the specification changes) |