diff options
Diffstat (limited to 'drivers/firewire/core-device.c')
| -rw-r--r-- | drivers/firewire/core-device.c | 21 |
1 files changed, 19 insertions, 2 deletions
diff --git a/drivers/firewire/core-device.c b/drivers/firewire/core-device.c index fd4c025a3f70..0547253d16fe 100644 --- a/drivers/firewire/core-device.c +++ b/drivers/firewire/core-device.c @@ -153,8 +153,25 @@ static void get_ids(const u32 *directory, int *id) static void get_modalias_ids(const struct fw_unit *unit, int *id) { - get_ids(&fw_parent_device(unit)->config_rom[ROOT_DIR_OFFSET], id); - get_ids(unit->directory, id); + const u32 *root_directory = &fw_parent_device(unit)->config_rom[ROOT_DIR_OFFSET]; + const u32 *directories[] = {NULL, NULL, NULL}; + const u32 *vendor_directory; + int i; + + directories[0] = root_directory; + + // Legacy layout of configuration ROM described in Annex 1 of 'Configuration ROM for AV/C + // Devices 1.0 (December 12, 2000, 1394 Trading Association, TA Document 1999027)'. + vendor_directory = search_directory(root_directory, CSR_VENDOR); + if (!vendor_directory) { + directories[1] = unit->directory; + } else { + directories[1] = vendor_directory; + directories[2] = unit->directory; + } + + for (i = 0; i < ARRAY_SIZE(directories) && !!directories[i]; ++i) + get_ids(directories[i], id); } static bool match_ids(const struct ieee1394_device_id *id_table, int *id) |