diff options
| author | Bob Moore <robert.moore@intel.com> | 2012-12-31 00:07:18 +0000 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2013-01-10 12:36:22 +0100 |
| commit | ef42e53f271b99fe9eb853df5661edeac8a277f6 (patch) | |
| tree | accdeb45436b2278086375374b5d88b529834253 /drivers/acpi/acpica/dsobject.c | |
| parent | 3e5621a750e2cfb26748c34acbb67c691845494a (diff) | |
| download | linux-ef42e53f271b99fe9eb853df5661edeac8a277f6.tar.bz2 | |
ACPICA: Interpreter: Add warning if 64-bit constant appears in 32-bit table.
Some ASL compilers allow 64-bit constants within a 32-bit table
(DSDT version == 1). When encountered, emit a warning that the
constant will be truncated to 32 bits. This is potentially a
serious problem in the ACPI table(s).
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/acpi/acpica/dsobject.c')
| -rw-r--r-- | drivers/acpi/acpica/dsobject.c | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/drivers/acpi/acpica/dsobject.c b/drivers/acpi/acpica/dsobject.c index 13844a115d97..82050bcd90e7 100644 --- a/drivers/acpi/acpica/dsobject.c +++ b/drivers/acpi/acpica/dsobject.c @@ -703,7 +703,7 @@ acpi_ds_init_object_from_op(struct acpi_walk_state *walk_state, /* Truncate value if we are executing from a 32-bit ACPI table */ #ifndef ACPI_NO_METHOD_EXECUTION - acpi_ex_truncate_for32bit_table(obj_desc); + (void)acpi_ex_truncate_for32bit_table(obj_desc); #endif break; @@ -725,8 +725,18 @@ acpi_ds_init_object_from_op(struct acpi_walk_state *walk_state, case AML_TYPE_LITERAL: obj_desc->integer.value = op->common.value.integer; + #ifndef ACPI_NO_METHOD_EXECUTION - acpi_ex_truncate_for32bit_table(obj_desc); + if (acpi_ex_truncate_for32bit_table(obj_desc)) { + + /* Warn if we found a 64-bit constant in a 32-bit table */ + + ACPI_WARNING((AE_INFO, + "Truncated 64-bit constant found in 32-bit table: %8.8X%8.8X => %8.8X", + ACPI_FORMAT_UINT64(op->common. + value.integer), + (u32)obj_desc->integer.value)); + } #endif break; |