firewire: Add rom_index attribute for unit sysfs directories.
Signed-off-by: Kristian Høgsberg <krh@redhat.com>
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
diff --git a/drivers/firewire/fw-device.c b/drivers/firewire/fw-device.c
index b24090a..4ade867 100644
--- a/drivers/firewire/fw-device.c
+++ b/drivers/firewire/fw-device.c
@@ -230,6 +230,22 @@
.show = show_config_rom_attribute,
};
+static ssize_t
+show_rom_index_attribute(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct fw_device *device = fw_device(dev->parent);
+ struct fw_unit *unit = fw_unit(dev);
+
+ return snprintf(buf, PAGE_SIZE, "%d\n",
+ unit->directory - device->config_rom);
+}
+
+static struct device_attribute rom_index_attribute = {
+ .attr = { .name = "rom_index", .mode = S_IRUGO, },
+ .show = show_rom_index_attribute,
+};
+
struct read_quadlet_callback_data {
struct completion done;
int rcode;
@@ -393,6 +409,11 @@
device_unregister(&unit->device);
kfree(unit);
}
+
+ if (device_create_file(&unit->device, &rom_index_attribute) < 0) {
+ device_unregister(&unit->device);
+ kfree(unit);
+ }
}
}