ieee1394: dv1394: move deprecation message from module init to file open

On many Linux installations, the dv1394 driver will be auto-loaded
whenever an AV/C device (e.g. camcorder or audio device) is plugged in.
An irritating message would then appear in the kernel log.

Defer this message to until a dv1394 character device file is actually
used by a program. Also include the program name in the message and
update the message slightly.

Signed-off-by: Stefan Richter <[e-mail]>

drivers/ieee1394/dv1394.c

···
 
 #endif
 
+	printk(KERN_INFO "%s: NOTE, the dv1394 interface is unsupported "
+	       "and will not be available in the new firewire driver stack. "
+	       "Try libraw1394 based programs instead.\n", current->comm);
+
 	return 0;
 }
 
···
 static int __init dv1394_init_module(void)
 {
 	int ret;
-
-	printk(KERN_WARNING
-	       "NOTE: The dv1394 driver is unsupported and may be removed in a "
-	       "future Linux release. Use raw1394 instead.\n");
 
 	cdev_init(&dv1394_cdev, &dv1394_fops);
 	dv1394_cdev.owner = THIS_MODULE;