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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.c25
1 files changed, 22 insertions, 3 deletions
diff --git a/drivers/w1/w1_int.c b/drivers/w1/w1_int.c
index 590bd8a7cd1b..9b084db739c7 100644
--- a/drivers/w1/w1_int.c
+++ b/drivers/w1/w1_int.c
@@ -75,8 +75,10 @@ static struct w1_master * w1_alloc_dev(u32 id, int slave_count, int slave_ttl,
atomic_set(&dev->refcnt, 2);
INIT_LIST_HEAD(&dev->slist);
+ INIT_LIST_HEAD(&dev->async_list);
mutex_init(&dev->mutex);
mutex_init(&dev->bus_mutex);
+ mutex_init(&dev->list_mutex);
memcpy(&dev->dev, device, sizeof(struct device));
dev_set_name(&dev->dev, "w1_bus_master%u", dev->id);
@@ -103,6 +105,10 @@ static void w1_free_dev(struct w1_master *dev)
device_unregister(&dev->dev);
}
+/**
+ * w1_add_master_device() - registers a new master device
+ * @master: master bus device to register
+ */
int w1_add_master_device(struct w1_bus_master *master)
{
struct w1_master *dev, *entry;
@@ -172,6 +178,7 @@ int w1_add_master_device(struct w1_bus_master *master)
#if 0 /* Thread cleanup code, not required currently. */
err_out_kill_thread:
+ set_bit(W1_ABORT_SEARCH, &dev->flags);
kthread_stop(dev->thread);
#endif
err_out_rm_attr:
@@ -187,16 +194,22 @@ void __w1_remove_master_device(struct w1_master *dev)
struct w1_netlink_msg msg;
struct w1_slave *sl, *sln;
- kthread_stop(dev->thread);
-
mutex_lock(&w1_mlock);
list_del(&dev->w1_master_entry);
mutex_unlock(&w1_mlock);
+ set_bit(W1_ABORT_SEARCH, &dev->flags);
+ kthread_stop(dev->thread);
+
mutex_lock(&dev->mutex);
- list_for_each_entry_safe(sl, sln, &dev->slist, w1_slave_entry)
+ mutex_lock(&dev->list_mutex);
+ list_for_each_entry_safe(sl, sln, &dev->slist, w1_slave_entry) {
+ mutex_unlock(&dev->list_mutex);
w1_slave_detach(sl);
+ mutex_lock(&dev->list_mutex);
+ }
w1_destroy_master_attributes(dev);
+ mutex_unlock(&dev->list_mutex);
mutex_unlock(&dev->mutex);
atomic_dec(&dev->refcnt);
@@ -206,7 +219,9 @@ void __w1_remove_master_device(struct w1_master *dev)
if (msleep_interruptible(1000))
flush_signals(current);
+ w1_process_callbacks(dev);
}
+ w1_process_callbacks(dev);
memset(&msg, 0, sizeof(msg));
msg.id.mst.id = dev->id;
@@ -216,6 +231,10 @@ void __w1_remove_master_device(struct w1_master *dev)
w1_free_dev(dev);
}
+/**
+ * w1_remove_master_device() - unregister a master device
+ * @bm: master bus device to remove
+ */
void w1_remove_master_device(struct w1_bus_master *bm)
{
struct w1_master *dev, *found = NULL;