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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.c34
1 files changed, 11 insertions, 23 deletions
diff --git a/drivers/w1/w1_int.c b/drivers/w1/w1_int.c
index a2f9065e192..68565aacec7 100644
--- a/drivers/w1/w1_int.c
+++ b/drivers/w1/w1_int.c
@@ -22,6 +22,7 @@
#include <linux/kernel.h>
#include <linux/list.h>
#include <linux/delay.h>
+#include <linux/kthread.h>
#include "w1.h"
#include "w1_log.h"
@@ -56,7 +57,6 @@ static struct w1_master * w1_alloc_dev(u32 id, int slave_count, int slave_ttl,
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;
@@ -67,8 +67,6 @@ static struct w1_master * w1_alloc_dev(u32 id, int slave_count, int 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);
@@ -116,12 +114,12 @@ int w1_add_master_device(struct w1_bus_master *master)
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;
}
@@ -138,20 +136,14 @@ int w1_add_master_device(struct w1_bus_master *master)
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:
- 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);
-
+ kthread_stop(dev->thread);
err_out_free_dev:
w1_free_dev(dev);
@@ -160,18 +152,14 @@ err_out_free_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);
- 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);
+ kthread_stop(dev->thread);
while (atomic_read(&dev->refcnt)) {
- dev_dbg(&dev->dev, "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))
@@ -179,7 +167,7 @@ void __w1_remove_master_device(struct w1_master *dev)
}
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);