diff options
Diffstat (limited to 'drivers/acpi/tables.c')
| -rw-r--r-- | drivers/acpi/tables.c | 41 |
1 files changed, 25 insertions, 16 deletions
diff --git a/drivers/acpi/tables.c b/drivers/acpi/tables.c index 45bd17313c4..849e2c36180 100644 --- a/drivers/acpi/tables.c +++ b/drivers/acpi/tables.c @@ -169,40 +169,40 @@ void acpi_table_print_madt_entry(struct acpi_subtable_header * header) int __init -acpi_table_parse_madt_family(char *id, - unsigned long madt_size, +acpi_table_parse_entries(char *id, + unsigned long table_size, int entry_id, - acpi_madt_entry_handler handler, + acpi_table_entry_handler handler, unsigned int max_entries) { - struct acpi_table_header *madt = NULL; + struct acpi_table_header *table_header = NULL; struct acpi_subtable_header *entry; unsigned int count = 0; - unsigned long madt_end; + unsigned long table_end; if (!handler) return -EINVAL; - /* Locate the MADT (if exists). There should only be one. */ - acpi_get_table(id, 0, &madt); + /* Locate the table (if exists). There should only be one. */ + acpi_get_table(id, 0, &table_header); - if (!madt) { + if (!table_header) { printk(KERN_WARNING PREFIX "%4.4s not present\n", id); return -ENODEV; } - madt_end = (unsigned long)madt + madt->length; + table_end = (unsigned long)table_header + table_header->length; /* Parse all entries looking for a match. */ entry = (struct acpi_subtable_header *) - ((unsigned long)madt + madt_size); + ((unsigned long)table_header + table_size); while (((unsigned long)entry) + sizeof(struct acpi_subtable_header) < - madt_end) { + table_end) { if (entry->type == entry_id && (!max_entries || count++ < max_entries)) - if (handler(entry, madt_end)) + if (handler(entry, table_end)) return -EINVAL; entry = (struct acpi_subtable_header *) @@ -218,13 +218,22 @@ acpi_table_parse_madt_family(char *id, int __init acpi_table_parse_madt(enum acpi_madt_type id, - acpi_madt_entry_handler handler, unsigned int max_entries) + acpi_table_entry_handler handler, unsigned int max_entries) { - return acpi_table_parse_madt_family(ACPI_SIG_MADT, + return acpi_table_parse_entries(ACPI_SIG_MADT, sizeof(struct acpi_table_madt), id, handler, max_entries); } +/** + * acpi_table_parse - find table with @id, run @handler on it + * + * @id: table id to find + * @handler: handler to run + * + * Scan the ACPI System Descriptor Table (STD) for a table matching @id, + * run @handler on it. Return 0 if table found, return on if not. + */ int __init acpi_table_parse(char *id, acpi_table_handler handler) { struct acpi_table_header *table = NULL; @@ -234,9 +243,9 @@ int __init acpi_table_parse(char *id, acpi_table_handler handler) acpi_get_table(id, 0, &table); if (table) { handler(table); - return 1; - } else return 0; + } else + return 1; } /* |