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Commit e41f8d70 authored by Stefan Richter's avatar Stefan Richter
Browse files

firewire: also use vendor ID in root directory for driver matches 



Due to AV/C protocol extensions, FireDTV devices need a vendor-specific
driver.  But their configuration ROM features a vendor ID only in the
root directory, not in the unit directory.

Signed-off-by: default avatarStefan Richter <stefanr@s5r6.in-berlin.de>
parent b3b29888

drivers/firewire/fw-device.c

+16 −6
Original line number Diff line number Diff line
@@ -58,7 +58,7 @@ EXPORT_SYMBOL(fw_csr_iterator_next); 


static int is_fw_unit(struct device *dev);



static int match_unit_directory(u32 *directory,

static int match_unit_directory(u32 *directory, u32 match_flags,

				const struct ieee1394_device_id *id)

{

	struct fw_csr_iterator ci;
@@ -77,21 +77,31 @@ static int match_unit_directory(u32 *directory, 
			match |= IEEE1394_MATCH_VERSION;

	}



	return (match & id->match_flags) == id->match_flags;

	return (match & match_flags) == match_flags;

}



static int fw_unit_match(struct device *dev, struct device_driver *drv)

{

	struct fw_unit *unit = fw_unit(dev);

	struct fw_driver *driver = fw_driver(drv);

	int i;

	struct fw_device *device;

	const struct ieee1394_device_id *id;



	/* We only allow binding to fw_units. */

	if (!is_fw_unit(dev))

		return 0;



	for (i = 0; driver->id_table[i].match_flags != 0; i++) {

		if (match_unit_directory(unit->directory, &driver->id_table[i]))

	device = fw_device(unit->device.parent);



	for (id = fw_driver(drv)->id_table; id->match_flags != 0; id++) {

		if (match_unit_directory(unit->directory, id->match_flags, id))

			return 1;



		/* Also check vendor ID in the root directory. */

		if ((id->match_flags & IEEE1394_MATCH_VENDOR_ID) &&

		    match_unit_directory(&device->config_rom[5],

				IEEE1394_MATCH_VENDOR_ID, id) &&

		    match_unit_directory(unit->directory, id->match_flags

				& ~IEEE1394_MATCH_VENDOR_ID, id))

			return 1;

	}