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>

5 files changed, 36 insertions, 86 deletions

diff --git a/drivers/ieee1394/Kconfig b/drivers/ieee1394/Kconfig
index f8ff6b866e6e..5c0b522ae077 100644
--- a/drivers/ieee1394/Kconfig
+++ b/drivers/ieee1394/Kconfig
@@ -34,23 +34,6 @@ config IEEE1394_VERBOSEDEBUG
           Say Y if you really want or need the debugging output, everyone
           else says N.
 
-config IEEE1394_EXTRA_CONFIG_ROMS
-        bool "Build in extra config rom entries for certain functionality"
-        depends on IEEE1394
-        help
-          Some IEEE1394 functionality depends on extra config rom entries
-          being available in the host adapters CSR. These options will
-          allow you to choose which ones.
-
-config IEEE1394_CONFIG_ROM_IP1394
-        bool "IP-1394 Entry"
-        depends on IEEE1394_EXTRA_CONFIG_ROMS && IEEE1394
-        help
-          Adds an entry for using IP-over-1394. If you want to use your
-          IEEE1394 bus as a network for IP systems (including interacting
-          with MacOSX and WinXP IP-over-1394), enable this option and the
-          eth1394 option below.
-
 comment "Device Drivers"
         depends on IEEE1394
 
@@ -120,11 +103,15 @@ config IEEE1394_SBP2_PHYS_DMA
           This option is buggy and currently broken on some architectures.
           If unsure, say N.
 
+config IEEE1394_ETH1394_ROM_ENTRY
+        depends on IEEE1394
+        bool
+        default n
+
 config IEEE1394_ETH1394
-        tristate "Ethernet over 1394"
+        tristate "IP over 1394"
         depends on IEEE1394 && EXPERIMENTAL && INET
-        select IEEE1394_CONFIG_ROM_IP1394
-        select IEEE1394_EXTRA_CONFIG_ROMS
+        select IEEE1394_ETH1394_ROM_ENTRY
         help
           This driver implements a functional majority of RFC 2734: IPv4 over
           1394.  It will provide IP connectivity with implementations of RFC
@@ -133,6 +120,8 @@ config IEEE1394_ETH1394
           This driver is still considered experimental.  It does not yet support
           MCAP, therefore multicast support is significantly limited.
 
+          The module is called eth1394 although it does not emulate Ethernet.
+
 config IEEE1394_DV1394
         tristate "OHCI-DV I/O support (deprecated)"
         depends on IEEE1394 && IEEE1394_OHCI1394
diff --git a/drivers/ieee1394/config_roms.c b/drivers/ieee1394/config_roms.c
index 556658a1db29..1b981207fa76 100644
--- a/drivers/ieee1394/config_roms.c
+++ b/drivers/ieee1394/config_roms.c
@@ -26,12 +26,6 @@ struct hpsb_config_rom_entry {
         /* Base initialization, called at module load */
         int (*init)(void);
 
-        /* Add entry to specified host */
-        int (*add)(struct hpsb_host *host);
-
-        /* Remove entry from specified host */
-        void (*remove)(struct hpsb_host *host);
-
         /* Cleanup called at module exit */
         void (*cleanup)(void);
 
@@ -78,7 +72,7 @@ int hpsb_default_host_entry(struct hpsb_host *host)
 }
 
 
-#ifdef CONFIG_IEEE1394_CONFIG_ROM_IP1394
+#ifdef CONFIG_IEEE1394_ETH1394_ROM_ENTRY
 #include "eth1394.h"
 
 static struct csr1212_keyval *ip1394_ud;
@@ -137,7 +131,7 @@ static void config_rom_ip1394_cleanup(void)
         }
 }
 
-static int config_rom_ip1394_add(struct hpsb_host *host)
+int hpsb_config_rom_ip1394_add(struct hpsb_host *host)
 {
         if (!ip1394_ud)
                 return -ENODEV;
@@ -146,30 +140,33 @@ static int config_rom_ip1394_add(struct hpsb_host *host)
                                                ip1394_ud) != CSR1212_SUCCESS)
                 return -ENOMEM;
 
+        host->config_roms |= HPSB_CONFIG_ROM_ENTRY_IP1394;
+        host->update_config_rom = 1;
         return 0;
 }
+EXPORT_SYMBOL_GPL(hpsb_config_rom_ip1394_add);
 
-static void config_rom_ip1394_remove(struct hpsb_host *host)
+void hpsb_config_rom_ip1394_remove(struct hpsb_host *host)
 {
         csr1212_detach_keyval_from_directory(host->csr.rom->root_kv, ip1394_ud);
+        host->config_roms &= ~HPSB_CONFIG_ROM_ENTRY_IP1394;
+        host->update_config_rom = 1;
 }
+EXPORT_SYMBOL_GPL(hpsb_config_rom_ip1394_remove);
 
 static struct hpsb_config_rom_entry ip1394_entry = {
         .name           = "ip1394",
         .init           = config_rom_ip1394_init,
-        .add            = config_rom_ip1394_add,
-        .remove         = config_rom_ip1394_remove,
         .cleanup        = config_rom_ip1394_cleanup,
         .flag           = HPSB_CONFIG_ROM_ENTRY_IP1394,
 };
-#endif /* CONFIG_IEEE1394_CONFIG_ROM_IP1394 */
 
+#endif /* CONFIG_IEEE1394_ETH1394_ROM_ENTRY */
 
 static struct hpsb_config_rom_entry *const config_rom_entries[] = {
-#ifdef CONFIG_IEEE1394_CONFIG_ROM_IP1394
+#ifdef CONFIG_IEEE1394_ETH1394_ROM_ENTRY
         &ip1394_entry,
 #endif
-        NULL,
 };
 
 /* Initialize all config roms */
@@ -177,18 +174,12 @@ int hpsb_init_config_roms(void)
 {
         int i, error = 0;
 
-        for (i = 0; config_rom_entries[i]; i++) {
-                if (!config_rom_entries[i]->init)
-                        continue;
-
+        for (i = 0; i < ARRAY_SIZE(config_rom_entries); i++)
                 if (config_rom_entries[i]->init()) {
                         HPSB_ERR("Failed to initialize config rom entry `%s'",
                                  config_rom_entries[i]->name);
                         error = -1;
-                } else
-                        HPSB_DEBUG("Initialized config rom entry `%s'",
-                                   config_rom_entries[i]->name);
-        }
+                }
 
         return error;
 }
@@ -198,43 +189,6 @@ void hpsb_cleanup_config_roms(void)
 {
         int i;
 
-        for (i = 0; config_rom_entries[i]; i++) {
-                if (config_rom_entries[i]->cleanup)
-                        config_rom_entries[i]->cleanup();
-        }
-}
-
-/* Add extra config roms to specified host */
-int hpsb_add_extra_config_roms(struct hpsb_host *host)
-{
-        int i, error = 0;
-
-        for (i = 0; config_rom_entries[i]; i++) {
-                if (config_rom_entries[i]->add(host)) {
-                        HPSB_ERR("fw-host%d: Failed to attach config rom entry `%s'",
-                                 host->id, config_rom_entries[i]->name);
-                        error = -1;
-                } else {
-                        host->config_roms |= config_rom_entries[i]->flag;
-                        host->update_config_rom = 1;
-                }
-        }
-
-        return error;
-}
-
-/* Remove extra config roms from specified host */
-void hpsb_remove_extra_config_roms(struct hpsb_host *host)
-{
-        int i;
-
-        for (i = 0; config_rom_entries[i]; i++) {
-                if (!(host->config_roms & config_rom_entries[i]->flag))
-                        continue;
-
-                config_rom_entries[i]->remove(host);
-
-                host->config_roms &= ~config_rom_entries[i]->flag;
-                host->update_config_rom = 1;
-        }
+        for (i = 0; i < ARRAY_SIZE(config_rom_entries); i++)
+                config_rom_entries[i]->cleanup();
 }
diff --git a/drivers/ieee1394/config_roms.h b/drivers/ieee1394/config_roms.h
index 02a21871bdaf..1f5cd1f16c44 100644
--- a/drivers/ieee1394/config_roms.h
+++ b/drivers/ieee1394/config_roms.h
@@ -6,11 +6,14 @@ struct hpsb_host;
 int hpsb_default_host_entry(struct hpsb_host *host);
 int hpsb_init_config_roms(void);
 void hpsb_cleanup_config_roms(void);
-int hpsb_add_extra_config_roms(struct hpsb_host *host);
-void hpsb_remove_extra_config_roms(struct hpsb_host *host);
 
 /* List of flags to check if a host contains a certain extra config rom
  * entry. Available in the host->config_roms member. */
 #define HPSB_CONFIG_ROM_ENTRY_IP1394            0x00000001
 
+#ifdef CONFIG_IEEE1394_ETH1394_ROM_ENTRY
+int hpsb_config_rom_ip1394_add(struct hpsb_host *host);
+void hpsb_config_rom_ip1394_remove(struct hpsb_host *host);
+#endif
+
 #endif /* _IEEE1394_CONFIG_ROMS_H */
diff --git a/drivers/ieee1394/eth1394.c b/drivers/ieee1394/eth1394.c
index d056c5953be3..b4fa754bfd1a 100644
--- a/drivers/ieee1394/eth1394.c
+++ b/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);
diff --git a/drivers/ieee1394/hosts.c b/drivers/ieee1394/hosts.c
index 1bf4aa3e8d15..6164a9a83396 100644
--- a/drivers/ieee1394/hosts.c
+++ b/drivers/ieee1394/hosts.c
@@ -180,7 +180,7 @@ int hpsb_add_host(struct hpsb_host *host)
 {
         if (hpsb_default_host_entry(host))
                 return -ENOMEM;
-        hpsb_add_extra_config_roms(host);
+
         highlevel_add_host(host);
         return 0;
 }
@@ -202,7 +202,6 @@ void hpsb_remove_host(struct hpsb_host *host)
 
         host->driver = &dummy_driver;
         highlevel_remove_host(host);
-        hpsb_remove_extra_config_roms(host);
 
         class_device_unregister(&host->class_dev);
         device_unregister(&host->device);