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Diffstat (limited to 'drivers/w1/w1_int.c')
-rw-r--r--drivers/w1/w1_int.c41
1 files changed, 24 insertions, 17 deletions
diff --git a/drivers/w1/w1_int.c b/drivers/w1/w1_int.c
index 5f0bafbbd57..35e85d96170 100644
--- a/drivers/w1/w1_int.c
+++ b/drivers/w1/w1_int.c
@@ -1,8 +1,8 @@
/*
- * w1_int.c
+ * w1_int.c
*
* Copyright (c) 2004 Evgeniy Polyakov <johnpol@2ka.mipt.ru>
- *
+ *
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
@@ -39,8 +39,9 @@ extern spinlock_t w1_mlock;
extern int w1_process(void *);
-struct w1_master * w1_alloc_dev(u32 id, int slave_count, int slave_ttl,
- struct device_driver *driver, struct device *device)
+static struct w1_master * w1_alloc_dev(u32 id, int slave_count, int slave_ttl,
+ struct device_driver *driver,
+ struct device *device)
{
struct w1_master *dev;
int err;
@@ -60,14 +61,15 @@ struct w1_master * w1_alloc_dev(u32 id, int slave_count, int slave_ttl,
dev->bus_master = (struct w1_bus_master *)(dev + 1);
- dev->owner = THIS_MODULE;
- dev->max_slave_count = slave_count;
- dev->slave_count = 0;
- dev->attempts = 0;
- dev->kpid = -1;
- dev->initialized = 0;
- dev->id = id;
+ dev->owner = THIS_MODULE;
+ dev->max_slave_count = slave_count;
+ dev->slave_count = 0;
+ dev->attempts = 0;
+ dev->kpid = -1;
+ dev->initialized = 0;
+ dev->id = id;
dev->slave_ttl = slave_ttl;
+ dev->search_count = -1; /* continual scan */
atomic_set(&dev->refcnt, 2);
@@ -105,7 +107,7 @@ struct w1_master * w1_alloc_dev(u32 id, int slave_count, int slave_ttl,
return dev;
}
-void w1_free_dev(struct w1_master *dev)
+static void w1_free_dev(struct w1_master *dev)
{
device_unregister(&dev->dev);
if (dev->nls && dev->nls->sk_socket)
@@ -120,6 +122,13 @@ 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;
@@ -153,7 +162,7 @@ int w1_add_master_device(struct w1_bus_master *master)
return 0;
err_out_kill_thread:
- dev->need_exit = 1;
+ set_bit(W1_MASTER_NEED_EXIT, &dev->flags);
if (kill_proc(dev->kpid, SIGTERM, 1))
dev_err(&dev->dev,
"Failed to send signal to w1 kernel thread %d.\n",
@@ -171,7 +180,7 @@ void __w1_remove_master_device(struct w1_master *dev)
int err;
struct w1_netlink_msg msg;
- dev->need_exit = 1;
+ set_bit(W1_MASTER_NEED_EXIT, &dev->flags);
err = kill_proc(dev->kpid, SIGTERM, 1);
if (err)
dev_err(&dev->dev,
@@ -197,10 +206,8 @@ void __w1_remove_master_device(struct w1_master *dev)
void w1_remove_master_device(struct w1_bus_master *bm)
{
struct w1_master *dev = NULL;
- struct list_head *ent, *n;
- list_for_each_safe(ent, n, &w1_masters) {
- dev = list_entry(ent, struct w1_master, w1_master_entry);
+ list_for_each_entry(dev, &w1_masters, w1_master_entry) {
if (!dev->initialized)
continue;