linux-hardened/drivers/ieee1394/config_roms.c
Stefan Richter 70093cfde8 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>
2007-04-30 00:00:30 +02:00

194 lines
4.5 KiB
C

/*
* IEEE 1394 for Linux
*
* ConfigROM entries
*
* Copyright (C) 2004 Ben Collins
*
* This code is licensed under the GPL. See the file COPYING in the root
* directory of the kernel sources for details.
*/
#include <linux/types.h>
#include "csr1212.h"
#include "ieee1394.h"
#include "ieee1394_types.h"
#include "hosts.h"
#include "ieee1394_core.h"
#include "highlevel.h"
#include "csr.h"
#include "config_roms.h"
struct hpsb_config_rom_entry {
const char *name;
/* Base initialization, called at module load */
int (*init)(void);
/* Cleanup called at module exit */
void (*cleanup)(void);
/* The flag added to host->config_roms */
unsigned int flag;
};
/* The default host entry. This must succeed. */
int hpsb_default_host_entry(struct hpsb_host *host)
{
struct csr1212_keyval *root;
struct csr1212_keyval *vend_id = NULL;
struct csr1212_keyval *text = NULL;
char csr_name[128];
int ret;
sprintf(csr_name, "Linux - %s", host->driver->name);
root = host->csr.rom->root_kv;
vend_id = csr1212_new_immediate(CSR1212_KV_ID_VENDOR, host->csr.guid_hi >> 8);
text = csr1212_new_string_descriptor_leaf(csr_name);
if (!vend_id || !text) {
if (vend_id)
csr1212_release_keyval(vend_id);
if (text)
csr1212_release_keyval(text);
csr1212_destroy_csr(host->csr.rom);
return -ENOMEM;
}
csr1212_associate_keyval(vend_id, text);
csr1212_release_keyval(text);
ret = csr1212_attach_keyval_to_directory(root, vend_id);
csr1212_release_keyval(vend_id);
if (ret != CSR1212_SUCCESS) {
csr1212_destroy_csr(host->csr.rom);
return -ENOMEM;
}
host->update_config_rom = 1;
return 0;
}
#ifdef CONFIG_IEEE1394_ETH1394_ROM_ENTRY
#include "eth1394.h"
static struct csr1212_keyval *ip1394_ud;
static int config_rom_ip1394_init(void)
{
struct csr1212_keyval *spec_id = NULL;
struct csr1212_keyval *spec_desc = NULL;
struct csr1212_keyval *ver = NULL;
struct csr1212_keyval *ver_desc = NULL;
int ret = -ENOMEM;
ip1394_ud = csr1212_new_directory(CSR1212_KV_ID_UNIT);
spec_id = csr1212_new_immediate(CSR1212_KV_ID_SPECIFIER_ID,
ETHER1394_GASP_SPECIFIER_ID);
spec_desc = csr1212_new_string_descriptor_leaf("IANA");
ver = csr1212_new_immediate(CSR1212_KV_ID_VERSION,
ETHER1394_GASP_VERSION);
ver_desc = csr1212_new_string_descriptor_leaf("IPv4");
if (!ip1394_ud || !spec_id || !spec_desc || !ver || !ver_desc)
goto ip1394_fail;
csr1212_associate_keyval(spec_id, spec_desc);
csr1212_associate_keyval(ver, ver_desc);
if (csr1212_attach_keyval_to_directory(ip1394_ud, spec_id)
== CSR1212_SUCCESS &&
csr1212_attach_keyval_to_directory(ip1394_ud, ver)
== CSR1212_SUCCESS)
ret = 0;
ip1394_fail:
if (ret && ip1394_ud) {
csr1212_release_keyval(ip1394_ud);
ip1394_ud = NULL;
}
if (spec_id)
csr1212_release_keyval(spec_id);
if (spec_desc)
csr1212_release_keyval(spec_desc);
if (ver)
csr1212_release_keyval(ver);
if (ver_desc)
csr1212_release_keyval(ver_desc);
return ret;
}
static void config_rom_ip1394_cleanup(void)
{
if (ip1394_ud) {
csr1212_release_keyval(ip1394_ud);
ip1394_ud = NULL;
}
}
int hpsb_config_rom_ip1394_add(struct hpsb_host *host)
{
if (!ip1394_ud)
return -ENODEV;
if (csr1212_attach_keyval_to_directory(host->csr.rom->root_kv,
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);
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,
.cleanup = config_rom_ip1394_cleanup,
.flag = HPSB_CONFIG_ROM_ENTRY_IP1394,
};
#endif /* CONFIG_IEEE1394_ETH1394_ROM_ENTRY */
static struct hpsb_config_rom_entry *const config_rom_entries[] = {
#ifdef CONFIG_IEEE1394_ETH1394_ROM_ENTRY
&ip1394_entry,
#endif
};
/* Initialize all config roms */
int hpsb_init_config_roms(void)
{
int i, error = 0;
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;
}
return error;
}
/* Cleanup all config roms */
void hpsb_cleanup_config_roms(void)
{
int i;
for (i = 0; i < ARRAY_SIZE(config_rom_entries); i++)
config_rom_entries[i]->cleanup();
}