> The intended use of the read-only sysfs file is to enable first-line
> support staff to determine quickly what actual firmware file is being
> used.

You have that in the driver (and similar ones):

+	dev_info(&vub300->udev->dev, "requesting offload firmware %s\n",
+		 vub300->vub_name);

Won't checking the logs do?

Regards,

   Wolfram

-- 
Pengutronix e.K.                           | Wolfram Sang                |
Industrial Linux Solutions                 | http://www.pengutronix.de/  |