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path: root/drivers/w1/w1_int.c
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Diffstat (limited to 'drivers/w1/w1_int.c')
-rw-r--r--drivers/w1/w1_int.c26
1 files changed, 17 insertions, 9 deletions
diff --git a/drivers/w1/w1_int.c b/drivers/w1/w1_int.c
index ed3228017da..36ff40250b6 100644
--- a/drivers/w1/w1_int.c
+++ b/drivers/w1/w1_int.c
@@ -61,6 +61,9 @@ static struct w1_master * w1_alloc_dev(u32 id, int slave_count, int slave_ttl,
dev->slave_ttl = slave_ttl;
dev->search_count = -1; /* continual scan */
+ /* 1 for w1_process to decrement
+ * 1 for __w1_remove_master_device to decrement
+ */
atomic_set(&dev->refcnt, 2);
INIT_LIST_HEAD(&dev->slist);
@@ -109,23 +112,23 @@ int w1_add_master_device(struct w1_bus_master *master)
if (!dev)
return -ENOMEM;
+ retval = w1_create_master_attributes(dev);
+ if (retval)
+ goto err_out_free_dev;
+
+ memcpy(dev->bus_master, master, sizeof(struct w1_bus_master));
+
+ dev->initialized = 1;
+
dev->thread = kthread_run(&w1_process, dev, "%s", dev->name);
if (IS_ERR(dev->thread)) {
retval = PTR_ERR(dev->thread);
dev_err(&dev->dev,
"Failed to create new kernel thread. err=%d\n",
retval);
- goto err_out_free_dev;
+ goto err_out_rm_attr;
}
- retval = w1_create_master_attributes(dev);
- if (retval)
- goto err_out_kill_thread;
-
- memcpy(dev->bus_master, master, sizeof(struct w1_bus_master));
-
- dev->initialized = 1;
-
mutex_lock(&w1_mlock);
list_add(&dev->w1_master_entry, &w1_masters);
mutex_unlock(&w1_mlock);
@@ -137,8 +140,13 @@ int w1_add_master_device(struct w1_bus_master *master)
return 0;
+#if 0 /* Thread cleanup code, not required currently. */
err_out_kill_thread:
+ set_bit(W1_MASTER_NEED_EXIT, &dev->flags);
kthread_stop(dev->thread);
+#endif
+err_out_rm_attr:
+ w1_destroy_master_attributes(dev);
err_out_free_dev:
w1_free_dev(dev);