/*
- * 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
#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_driver;
-extern struct bus_type w1_bus_type;
-extern struct device w1_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 *);
-
-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;
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->initialized = 0;
+ dev->id = id;
dev->slave_ttl = slave_ttl;
+ dev->search_count = -1; /* continual scan */
atomic_set(&dev->refcnt, 2);
INIT_LIST_HEAD(&dev->slist);
init_MUTEX(&dev->mutex);
- init_completion(&dev->dev_released);
- 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);
dev->driver = driver;
- dev->groups = 23;
+ dev->groups = 1;
dev->seq = 1;
- dev->nls = netlink_kernel_create(NETLINK_NFLOG, NULL);
- if (!dev->nls) {
- printk(KERN_ERR "Failed to create new netlink socket(%u) for w1 master %s.\n",
- NETLINK_NFLOG, dev->dev.bus_id);
- }
+ dev_init_netlink(dev);
err = device_register(&dev->dev);
if (err) {
printk(KERN_ERR "Failed to register master device. err=%d\n", err);
- if (dev->nls && dev->nls->sk_socket)
- sock_release(dev->nls->sk_socket);
+
+ dev_fini_netlink(dev);
+
memset(dev, 0, sizeof(struct w1_master));
kfree(dev);
dev = NULL;
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)
- sock_release(dev->nls->sk_socket);
- memset(dev, 0, sizeof(struct w1_master) + sizeof(struct w1_bus_master));
- kfree(dev);
}
int w1_add_master_device(struct w1_bus_master *master)
int retval = 0;
struct w1_netlink_msg msg;
- dev = w1_alloc_dev(w1_ids++, w1_max_slave_count, w1_max_slave_ttl, &w1_driver, &w1_device);
+ /* 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_master_driver, &w1_master_device);
if (!dev)
return -ENOMEM;
- dev->kpid = kernel_thread(&w1_process, dev, 0);
- if (dev->kpid < 0) {
+ 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",
- dev->kpid);
- retval = dev->kpid;
+ retval);
goto err_out_free_dev;
}
spin_unlock(&w1_mlock);
msg.id.mst.id = dev->id;
- msg.id.mst.pid = dev->kpid;
+ msg.id.mst.pid = dev->thread->pid;
msg.type = W1_MASTER_ADD;
w1_netlink_send(dev, &msg);
return 0;
err_out_kill_thread:
- dev->need_exit = 1;
- 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);
-
+ kthread_stop(dev->thread);
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;
- dev->need_exit = 1;
- 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);
+ set_bit(W1_MASTER_NEED_EXIT, &dev->flags);
+ kthread_stop(dev->thread);
while (atomic_read(&dev->refcnt)) {
- printk(KERN_INFO "Waiting for %s to become free: refcnt=%d.\n",
+ dev_info(&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 = dev->kpid;
+ msg.id.mst.pid = pid;
msg.type = W1_MASTER_REMOVE;
w1_netlink_send(dev, &msg);
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;
git://git.onelab.eu / linux-2.6.git / blobdiff