diff options
Diffstat (limited to 'drivers/acpi/parser/psopcode.c')
| -rw-r--r-- | drivers/acpi/parser/psopcode.c | 28 |
1 files changed, 9 insertions, 19 deletions
diff --git a/drivers/acpi/parser/psopcode.c b/drivers/acpi/parser/psopcode.c index 95ef5e8947a..6f7594a516d 100644 --- a/drivers/acpi/parser/psopcode.c +++ b/drivers/acpi/parser/psopcode.c @@ -428,33 +428,23 @@ acpi_ps_get_opcode_info ( /* * Detect normal 8-bit opcode or extended 16-bit opcode */ - switch ((u8) (opcode >> 8)) { - case 0: - + if (!(opcode & 0xFF00)) { /* Simple (8-bit) opcode: 0-255, can't index beyond table */ return (&acpi_gbl_aml_op_info [acpi_gbl_short_op_index [(u8) opcode]]); + } - case AML_EXTOP: - - /* Extended (16-bit, prefix+opcode) opcode */ - - if (((u8) opcode) <= MAX_EXTENDED_OPCODE) { - return (&acpi_gbl_aml_op_info [acpi_gbl_long_op_index [(u8) opcode]]); - } - - /* Else fall through to error case below */ - /*lint -fallthrough */ - - default: + if (((opcode & 0xFF00) == AML_EXTENDED_OPCODE) && + (((u8) opcode) <= MAX_EXTENDED_OPCODE)) { + /* Valid extended (16-bit) opcode */ - ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, - "Unknown AML opcode [%4.4X]\n", opcode)); - break; + return (&acpi_gbl_aml_op_info [acpi_gbl_long_op_index [(u8) opcode]]); } + /* Unknown AML opcode */ - /* Default is "unknown opcode" */ + ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, + "Unknown AML opcode [%4.4X]\n", opcode)); return (&acpi_gbl_aml_op_info [_UNK]); } |