diff options
Diffstat (limited to 'drivers/w1/w1_int.c')
| -rw-r--r-- | drivers/w1/w1_int.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/w1/w1_int.c b/drivers/w1/w1_int.c index ce24e3b3fc2..280f140ae69 100644 --- a/drivers/w1/w1_int.c +++ b/drivers/w1/w1_int.c @@ -121,6 +121,14 @@ int w1_add_master_device(struct w1_bus_master *master) int retval = 0; struct w1_netlink_msg msg; + /* validate minimum functionality */ + if (!(master->touch_bit && master->reset_bus) && + !(master->write_bit && master->read_bit)) + { + printk(KERN_ERR "w1_add_master_device: invalid function set\n"); + return(-EINVAL); + } + dev = w1_alloc_dev(w1_ids++, w1_max_slave_count, w1_max_slave_ttl, &w1_driver, &w1_device); if (!dev) return -ENOMEM; |