diff options
Diffstat (limited to 'drivers/acpi/acpica/tbutils.c')
-rw-r--r-- | drivers/acpi/acpica/tbutils.c | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/drivers/acpi/acpica/tbutils.c b/drivers/acpi/acpica/tbutils.c index 568ac0e4a3c6..db7f2aa9a457 100644 --- a/drivers/acpi/acpica/tbutils.c +++ b/drivers/acpi/acpica/tbutils.c @@ -412,3 +412,36 @@ next_table: return_ACPI_STATUS(AE_OK); } + +/******************************************************************************* + * + * FUNCTION: acpi_is_valid_signature + * + * PARAMETERS: signature - Sig string to be validated + * + * RETURN: TRUE if signature is correct length and has valid characters + * + * DESCRIPTION: Validate an ACPI table signature. + * + ******************************************************************************/ + +u8 acpi_is_valid_signature(char *signature) +{ + u32 i; + + /* Validate the signature length */ + + if (strlen(signature) != ACPI_NAME_SIZE) { + return (FALSE); + } + + /* Validate each character in the signature */ + + for (i = 0; i < ACPI_NAME_SIZE; i++) { + if (!acpi_ut_valid_acpi_char(signature[i], i)) { + return (FALSE); + } + } + + return (TRUE); +} |