ieee1394: eth1394: don't autoload by hotplug when ohci1394 starts

Until now, ieee1394 put an IP-over-1394 capability entry into each new
host's config ROM.  As soon as the controller was initialized --- i.e.
right after modprobe ohci1394 --- this entry triggered a hotplug event
which typically caused auto-loading of eth1394.

This irritated or annoyed many users and distributors.  Of course they
could blacklist eth1394, but then ieee1394 wrongly advertized IP-over-
1394 capability to the FireWire bus.

Therefore
  - remove the offending kernel config option
    IEEE1394_CONFIG_ROM_IP1394,
  - let eth1394 add the ROM entry by itself, i.e. only after eth1394 was
    loaded.

This fixes http://bugzilla.kernel.org/show_bug.cgi?id=7793 .

To emulate the behaviour of older kernels, simply add the following to
to /etc/modprobe.conf:

install ohci1394 /sbin/modprobe eth1394; \
                 /sbin/modprobe --ignore-install ohci1394

Note, autoloading of eth1394 when an _external_ IP-over-1394 capable
device is discovered is _not_ affected by this patch.

Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>

drivers/ieee1394/eth1394.c

@@ -561,8 +561,10 @@ static void ether1394_add_host (struct hpsb_host *host)
 	struct eth1394_priv *priv;
 	u64 fifo_addr;
 
-	if (!(host->config_roms & HPSB_CONFIG_ROM_ENTRY_IP1394))
+	if (hpsb_config_rom_ip1394_add(host) != 0) {
+		ETH1394_PRINT_G(KERN_ERR, "Can't add IP-over-1394 ROM entry\n");
 		return;
+	}
 
 	fifo_addr = hpsb_allocate_and_register_addrspace(
 			&eth1394_highlevel, host, &addr_ops,
@@ -570,6 +572,7 @@ static void ether1394_add_host (struct hpsb_host *host)
 			CSR1212_INVALID_ADDR_SPACE, CSR1212_INVALID_ADDR_SPACE);
 	if (fifo_addr == CSR1212_INVALID_ADDR_SPACE) {
 		ETH1394_PRINT_G(KERN_ERR, "Cannot register CSR space\n");
+		hpsb_config_rom_ip1394_remove(host);
 		return;
 	}
 
@@ -649,6 +652,7 @@ out:
 	if (hi)
 		hpsb_destroy_hostinfo(&eth1394_highlevel, host);
 	hpsb_unregister_addrspace(&eth1394_highlevel, host, fifo_addr);
+	hpsb_config_rom_ip1394_remove(host);
 }
 
 /* Remove a card from our list */
@@ -662,6 +666,7 @@ static void ether1394_remove_host (struct hpsb_host *host)
 		return;
 	priv = netdev_priv(hi->dev);
 	hpsb_unregister_addrspace(&eth1394_highlevel, host, priv->local_fifo);
+	hpsb_config_rom_ip1394_remove(host);
 	if (priv->iso)
 		hpsb_iso_shutdown(priv->iso);
 	unregister_netdev(hi->dev);