#include <linux/kernel.h>
#include <linux/list.h>
#include <linux/delay.h>
-#include <linux/kthread.h>
#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 spinlock_t 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)
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;
INIT_LIST_HEAD(&dev->slist);
init_MUTEX(&dev->mutex);
+ init_completion(&dev->dev_exited);
+
memcpy(&dev->dev, device, sizeof(struct device));
snprintf(dev->dev.bus_id, sizeof(dev->dev.bus_id),
"w1_bus_master%u", dev->id);
return dev;
}
-static void w1_free_dev(struct w1_master *dev)
+void w1_free_dev(struct w1_master *dev)
{
device_unregister(&dev->dev);
}
if (!dev)
return -ENOMEM;
- dev->thread = kthread_run(&w1_process, dev, "%s", dev->name);
- if (IS_ERR(dev->thread)) {
- retval = PTR_ERR(dev->thread);
+ dev->kpid = kernel_thread(&w1_process, dev, 0);
+ if (dev->kpid < 0) {
dev_err(&dev->dev,
"Failed to create new kernel thread. err=%d\n",
- retval);
+ dev->kpid);
+ retval = dev->kpid;
goto err_out_free_dev;
}
spin_unlock(&w1_mlock);
msg.id.mst.id = dev->id;
- msg.id.mst.pid = dev->thread->pid;
+ msg.id.mst.pid = dev->kpid;
msg.type = W1_MASTER_ADD;
w1_netlink_send(dev, &msg);
return 0;
err_out_kill_thread:
- kthread_stop(dev->thread);
+ 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",
+ dev->kpid);
+ wait_for_completion(&dev->dev_exited);
+
err_out_free_dev:
w1_free_dev(dev);
void __w1_remove_master_device(struct w1_master *dev)
{
+ int err;
struct w1_netlink_msg msg;
- pid_t pid = dev->thread->pid;
set_bit(W1_MASTER_NEED_EXIT, &dev->flags);
- kthread_stop(dev->thread);
+ err = kill_proc(dev->kpid, SIGTERM, 1);
+ if (err)
+ dev_err(&dev->dev,
+ "%s: Failed to send signal to w1 kernel thread %d.\n",
+ __func__, dev->kpid);
while (atomic_read(&dev->refcnt)) {
- dev_info(&dev->dev, "Waiting for %s to become free: refcnt=%d.\n",
+ dev_dbg(&dev->dev, "Waiting for %s to become free: refcnt=%d.\n",
dev->name, atomic_read(&dev->refcnt));
if (msleep_interruptible(1000))
}
msg.id.mst.id = dev->id;
- msg.id.mst.pid = pid;
+ msg.id.mst.pid = dev->kpid;
msg.type = W1_MASTER_REMOVE;
w1_netlink_send(dev, &msg);
EXPORT_SYMBOL(w1_add_master_device);
EXPORT_SYMBOL(w1_remove_master_device);
+
+MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_W1);