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authorDmitry Torokhov <dmitry.torokhov@gmail.com>2011-10-10 18:30:03 -0700
committerDmitry Torokhov <dmitry.torokhov@gmail.com>2011-10-10 18:34:47 -0700
commitba538cd2a83f3556448759283d2330a603005afe (patch)
treeb65d2ac13e5764d91b6ad1d44e0b88c5c699c8e6 /drivers/input
parentb5d21704361eefe337a36ebbb57a1d9927132511 (diff)
Input: serio_raw - use kref instead of rolling out its own refcounting
Reviewed-by: Wanlong Gao <gaowanlong@cn.fujitsu.com> Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Diffstat (limited to 'drivers/input')
-rw-r--r--drivers/input/serio/serio_raw.c28
1 files changed, 13 insertions, 15 deletions
diff --git a/drivers/input/serio/serio_raw.c b/drivers/input/serio/serio_raw.c
index b7ba4597f7f..ef3a69c304d 100644
--- a/drivers/input/serio/serio_raw.c
+++ b/drivers/input/serio/serio_raw.c
@@ -9,6 +9,7 @@
* the Free Software Foundation.
*/
+#include <linux/kref.h>
#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/poll.h>
@@ -33,7 +34,7 @@ struct serio_raw {
unsigned int tail, head;
char name[16];
- unsigned int refcnt;
+ struct kref kref;
struct serio *serio;
struct miscdevice dev;
wait_queue_head_t wait;
@@ -104,7 +105,7 @@ static int serio_raw_open(struct inode *inode, struct file *file)
list->serio_raw = serio_raw;
file->private_data = list;
- serio_raw->refcnt++;
+ kref_get(&serio_raw->kref);
list_add_tail(&list->node, &serio_raw->list);
out:
@@ -112,17 +113,14 @@ out:
return retval;
}
-static int serio_raw_cleanup(struct serio_raw *serio_raw)
+static void serio_raw_cleanup(struct kref *kref)
{
- if (--serio_raw->refcnt == 0) {
- misc_deregister(&serio_raw->dev);
- list_del_init(&serio_raw->node);
- kfree(serio_raw);
+ struct serio_raw *serio_raw =
+ container_of(kref, struct serio_raw, kref);
- return 1;
- }
-
- return 0;
+ misc_deregister(&serio_raw->dev);
+ list_del_init(&serio_raw->node);
+ kfree(serio_raw);
}
static int serio_raw_release(struct inode *inode, struct file *file)
@@ -132,7 +130,7 @@ static int serio_raw_release(struct inode *inode, struct file *file)
mutex_lock(&serio_raw_mutex);
- serio_raw_cleanup(serio_raw);
+ kref_put(&serio_raw->kref, serio_raw_cleanup);
mutex_unlock(&serio_raw_mutex);
return 0;
@@ -283,7 +281,7 @@ static int serio_raw_connect(struct serio *serio, struct serio_driver *drv)
mutex_lock(&serio_raw_mutex);
snprintf(serio_raw->name, sizeof(serio_raw->name), "serio_raw%d", serio_raw_no++);
- serio_raw->refcnt = 1;
+ kref_init(&serio_raw->kref);
serio_raw->serio = serio;
INIT_LIST_HEAD(&serio_raw->list);
init_waitqueue_head(&serio_raw->wait);
@@ -357,8 +355,8 @@ static void serio_raw_disconnect(struct serio *serio)
serio_set_drvdata(serio, NULL);
serio_raw->serio = NULL;
- if (!serio_raw_cleanup(serio_raw))
- wake_up_interruptible(&serio_raw->wait);
+ wake_up_interruptible(&serio_raw->wait);
+ kref_put(&serio_raw->kref, serio_raw_cleanup);
mutex_unlock(&serio_raw_mutex);
}