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Diffstat (limited to 'drivers/w1/w1.c')
-rw-r--r--drivers/w1/w1.c77
1 files changed, 29 insertions, 48 deletions
diff --git a/drivers/w1/w1.c b/drivers/w1/w1.c
index 024206c4a0e4..a698b517e863 100644
--- a/drivers/w1/w1.c
+++ b/drivers/w1/w1.c
@@ -30,6 +30,7 @@
#include <linux/device.h>
#include <linux/slab.h>
#include <linux/sched.h>
+#include <linux/kthread.h>
#include <asm/atomic.h>
@@ -57,9 +58,7 @@ module_param_named(slave_ttl, w1_max_slave_ttl, int, 0);
DEFINE_SPINLOCK(w1_mlock);
LIST_HEAD(w1_masters);
-static pid_t control_thread;
-static int control_needs_exit;
-static DECLARE_COMPLETION(w1_control_complete);
+static struct task_struct *w1_control_thread;
static int w1_master_match(struct device *dev, struct device_driver *drv)
{
@@ -164,11 +163,12 @@ struct device w1_master_device = {
.release = &w1_master_release
};
-struct device_driver w1_slave_driver = {
+static struct device_driver w1_slave_driver = {
.name = "w1_slave_driver",
.bus = &w1_bus_type,
};
+#if 0
struct device w1_slave_device = {
.parent = NULL,
.bus = &w1_bus_type,
@@ -176,6 +176,7 @@ struct device w1_slave_device = {
.driver = &w1_slave_driver,
.release = &w1_slave_release
};
+#endif /* 0 */
static ssize_t w1_master_attribute_show_name(struct device *dev, struct device_attribute *attr, char *buf)
{
@@ -355,7 +356,7 @@ int w1_create_master_attributes(struct w1_master *master)
return sysfs_create_group(&master->dev.kobj, &w1_master_defattr_group);
}
-void w1_destroy_master_attributes(struct w1_master *master)
+static void w1_destroy_master_attributes(struct w1_master *master)
{
sysfs_remove_group(&master->dev.kobj, &w1_master_defattr_group);
}
@@ -386,11 +387,14 @@ static int w1_uevent(struct device *dev, char **envp, int num_envp, char *buffer
if (dev->driver != &w1_slave_driver || !sl)
return 0;
- err = add_uevent_var(envp, num_envp, &cur_index, buffer, buffer_size, &cur_len, "W1_FID=%02X", sl->reg_num.family);
+ err = add_uevent_var(envp, num_envp, &cur_index, buffer, buffer_size,
+ &cur_len, "W1_FID=%02X", sl->reg_num.family);
if (err)
return err;
- err = add_uevent_var(envp, num_envp, &cur_index, buffer, buffer_size, &cur_len, "W1_SLAVE_ID=%024LX", (u64)sl->reg_num.id);
+ err = add_uevent_var(envp, num_envp, &cur_index, buffer, buffer_size,
+ &cur_len, "W1_SLAVE_ID=%024LX",
+ (unsigned long long)sl->reg_num.id);
if (err)
return err;
@@ -552,7 +556,7 @@ static void w1_slave_detach(struct w1_slave *sl)
kfree(sl);
}
-static struct w1_master *w1_search_master(unsigned long data)
+static struct w1_master *w1_search_master(void *data)
{
struct w1_master *dev;
int found = 0;
@@ -583,7 +587,7 @@ void w1_reconnect_slaves(struct w1_family *f)
spin_unlock_bh(&w1_mlock);
}
-static void w1_slave_found(unsigned long data, u64 rn)
+static void w1_slave_found(void *data, u64 rn)
{
int slave_count;
struct w1_slave *sl;
@@ -595,8 +599,8 @@ static void w1_slave_found(unsigned long data, u64 rn)
dev = w1_search_master(data);
if (!dev) {
- printk(KERN_ERR "Failed to find w1 master device for data %08lx, it is impossible.\n",
- data);
+ printk(KERN_ERR "Failed to find w1 master device for data %p, "
+ "it is impossible.\n", data);
return;
}
@@ -712,22 +716,16 @@ static int w1_control(void *data)
{
struct w1_slave *sl, *sln;
struct w1_master *dev, *n;
- int err, have_to_wait = 0;
+ int have_to_wait = 0;
- daemonize("w1_control");
- allow_signal(SIGTERM);
-
- while (!control_needs_exit || have_to_wait) {
+ while (!kthread_should_stop() || have_to_wait) {
have_to_wait = 0;
try_to_freeze();
msleep_interruptible(w1_control_timeout * 1000);
- if (signal_pending(current))
- flush_signals(current);
-
list_for_each_entry_safe(dev, n, &w1_masters, w1_master_entry) {
- if (!control_needs_exit && !dev->flags)
+ if (!kthread_should_stop() && !dev->flags)
continue;
/*
* Little race: we can create thread but not set the flag.
@@ -738,21 +736,12 @@ static int w1_control(void *data)
continue;
}
- if (control_needs_exit) {
+ if (kthread_should_stop() || test_bit(W1_MASTER_NEED_EXIT, &dev->flags)) {
set_bit(W1_MASTER_NEED_EXIT, &dev->flags);
- err = kill_proc(dev->kpid, SIGTERM, 1);
- if (err)
- dev_err(&dev->dev,
- "Failed to send signal to w1 kernel thread %d.\n",
- dev->kpid);
- }
-
- if (test_bit(W1_MASTER_NEED_EXIT, &dev->flags)) {
- wait_for_completion(&dev->dev_exited);
- spin_lock_bh(&w1_mlock);
+ spin_lock(&w1_mlock);
list_del(&dev->w1_master_entry);
- spin_unlock_bh(&w1_mlock);
+ spin_unlock(&w1_mlock);
down(&dev->mutex);
list_for_each_entry_safe(sl, sln, &dev->slist, w1_slave_entry) {
@@ -784,7 +773,7 @@ static int w1_control(void *data)
}
}
- complete_and_exit(&w1_control_complete, 0);
+ return 0;
}
int w1_process(void *data)
@@ -792,17 +781,11 @@ int w1_process(void *data)
struct w1_master *dev = (struct w1_master *) data;
struct w1_slave *sl, *sln;
- daemonize("%s", dev->name);
- allow_signal(SIGTERM);
-
- while (!test_bit(W1_MASTER_NEED_EXIT, &dev->flags)) {
+ while (!kthread_should_stop() && !test_bit(W1_MASTER_NEED_EXIT, &dev->flags)) {
try_to_freeze();
msleep_interruptible(w1_timeout * 1000);
- if (signal_pending(current))
- flush_signals(current);
-
- if (test_bit(W1_MASTER_NEED_EXIT, &dev->flags))
+ if (kthread_should_stop() || test_bit(W1_MASTER_NEED_EXIT, &dev->flags))
break;
if (!dev->initialized)
@@ -835,7 +818,6 @@ int w1_process(void *data)
}
atomic_dec(&dev->refcnt);
- complete_and_exit(&dev->dev_exited, 0);
return 0;
}
@@ -868,11 +850,11 @@ static int w1_init(void)
goto err_out_master_unregister;
}
- control_thread = kernel_thread(&w1_control, NULL, 0);
- if (control_thread < 0) {
+ w1_control_thread = kthread_run(w1_control, NULL, "w1_control");
+ if (IS_ERR(w1_control_thread)) {
+ retval = PTR_ERR(w1_control_thread);
printk(KERN_ERR "Failed to create control thread. err=%d\n",
- control_thread);
- retval = control_thread;
+ retval);
goto err_out_slave_unregister;
}
@@ -898,8 +880,7 @@ static void w1_fini(void)
list_for_each_entry(dev, &w1_masters, w1_master_entry)
__w1_remove_master_device(dev);
- control_needs_exit = 1;
- wait_for_completion(&w1_control_complete);
+ kthread_stop(w1_control_thread);
driver_unregister(&w1_slave_driver);
driver_unregister(&w1_master_driver);
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