[PATCH] w1: Userspace communication protocol over connector.

There are three types of messages between w1 core and userspace:
1. Events. They are generated each time new master or slave device found
	either due to automatic or requested search.
2. Userspace commands. Includes read/write and search/alarm search comamnds.
3. Replies to userspace commands.

From: Evgeniy Polyakov <johnpol@2ka.mipt.ru>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 15 insertions, 12 deletions

diff --git a/drivers/w1/w1_int.c b/drivers/w1/w1_int.c
index 68565aacec7..ae78473d11f 100644
--- a/drivers/w1/w1_int.c
+++ b/drivers/w1/w1_int.c
@@ -27,10 +27,19 @@
 #include "w1.h"
 #include "w1_log.h"
 #include "w1_netlink.h"
-#include "w1_int.h"
 
 static u32 w1_ids = 1;
 
+extern struct device_driver w1_master_driver;
+extern struct bus_type w1_bus_type;
+extern struct device w1_master_device;
+extern int w1_max_slave_count;
+extern int w1_max_slave_ttl;
+extern struct list_head w1_masters;
+extern struct semaphore w1_mlock;
+
+extern int w1_process(void *);
+
 static struct w1_master * w1_alloc_dev(u32 id, int slave_count, int slave_ttl,
                                        struct device_driver *driver,
                                        struct device *device)
@@ -74,16 +83,11 @@ static struct w1_master * w1_alloc_dev(u32 id, int slave_count, int slave_ttl,
 
         dev->driver = driver;
 
-        dev->groups = 1;
         dev->seq = 1;
-        dev_init_netlink(dev);
 
         err = device_register(&dev->dev);
         if (err) {
                 printk(KERN_ERR "Failed to register master device. err=%d\n", err);
-
-                dev_fini_netlink(dev);
-
                 memset(dev, 0, sizeof(struct w1_master));
                 kfree(dev);
                 dev = NULL;
@@ -92,7 +96,7 @@ static struct w1_master * w1_alloc_dev(u32 id, int slave_count, int slave_ttl,
         return dev;
 }
 
-static void w1_free_dev(struct w1_master *dev)
+void w1_free_dev(struct w1_master *dev)
 {
         device_unregister(&dev->dev);
 }
@@ -131,12 +135,12 @@ int w1_add_master_device(struct w1_bus_master *master)
 
         dev->initialized = 1;
 
-        spin_lock(&w1_mlock);
+        down(&w1_mlock);
         list_add(&dev->w1_master_entry, &w1_masters);
-        spin_unlock(&w1_mlock);
+        up(&w1_mlock);
 
+        memset(&msg, 0, sizeof(msg));
         msg.id.mst.id = dev->id;
-        msg.id.mst.pid = dev->thread->pid;
         msg.type = W1_MASTER_ADD;
         w1_netlink_send(dev, &msg);
 
@@ -153,7 +157,6 @@ err_out_free_dev:
 void __w1_remove_master_device(struct w1_master *dev)
 {
         struct w1_netlink_msg msg;
-        pid_t pid = dev->thread->pid;
 
         set_bit(W1_MASTER_NEED_EXIT, &dev->flags);
         kthread_stop(dev->thread);
@@ -166,8 +169,8 @@ void __w1_remove_master_device(struct w1_master *dev)
                         flush_signals(current);
         }
 
+        memset(&msg, 0, sizeof(msg));
         msg.id.mst.id = dev->id;
-        msg.id.mst.pid = pid;
         msg.type = W1_MASTER_REMOVE;
         w1_netlink_send(dev, &msg);