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authorDmitry Torokhov <dmitry.torokhov@gmail.com>2011-04-27 23:20:16 -0700
committerDmitry Torokhov <dmitry.torokhov@gmail.com>2011-04-27 23:22:01 -0700
commite490ebdc3ce1a58e66aeacc485294a45710067f5 (patch)
tree56ac678bc0dfcbde51dd49bbd5e5668067771248 /drivers/input/input-polldev.c
parentInput: tegra-kbc - add ghost key filter (diff)
downloadlinux-dev-e490ebdc3ce1a58e66aeacc485294a45710067f5.tar.xz
linux-dev-e490ebdc3ce1a58e66aeacc485294a45710067f5.zip
Input: input-polldev - use system-wide freezable workqueue
With introduction of concurrency-managed work queues there is rarely a point in creating private workqueues. Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Diffstat (limited to 'drivers/input/input-polldev.c')
-rw-r--r--drivers/input/input-polldev.c56
1 files changed, 3 insertions, 53 deletions
diff --git a/drivers/input/input-polldev.c b/drivers/input/input-polldev.c
index 3037842a60d8..b1aabde87523 100644
--- a/drivers/input/input-polldev.c
+++ b/drivers/input/input-polldev.c
@@ -13,6 +13,7 @@
#include <linux/jiffies.h>
#include <linux/slab.h>
#include <linux/mutex.h>
+#include <linux/workqueue.h>
#include <linux/input-polldev.h>
MODULE_AUTHOR("Dmitry Torokhov <dtor@mail.ru>");
@@ -20,44 +21,6 @@ MODULE_DESCRIPTION("Generic implementation of a polled input device");
MODULE_LICENSE("GPL v2");
MODULE_VERSION("0.1");
-static DEFINE_MUTEX(polldev_mutex);
-static int polldev_users;
-static struct workqueue_struct *polldev_wq;
-
-static int input_polldev_start_workqueue(void)
-{
- int retval;
-
- retval = mutex_lock_interruptible(&polldev_mutex);
- if (retval)
- return retval;
-
- if (!polldev_users) {
- polldev_wq = create_singlethread_workqueue("ipolldevd");
- if (!polldev_wq) {
- pr_err("failed to create ipolldevd workqueue\n");
- retval = -ENOMEM;
- goto out;
- }
- }
-
- polldev_users++;
-
- out:
- mutex_unlock(&polldev_mutex);
- return retval;
-}
-
-static void input_polldev_stop_workqueue(void)
-{
- mutex_lock(&polldev_mutex);
-
- if (!--polldev_users)
- destroy_workqueue(polldev_wq);
-
- mutex_unlock(&polldev_mutex);
-}
-
static void input_polldev_queue_work(struct input_polled_dev *dev)
{
unsigned long delay;
@@ -66,7 +29,7 @@ static void input_polldev_queue_work(struct input_polled_dev *dev)
if (delay >= HZ)
delay = round_jiffies_relative(delay);
- queue_delayed_work(polldev_wq, &dev->work, delay);
+ queue_delayed_work(system_freezable_wq, &dev->work, delay);
}
static void input_polled_device_work(struct work_struct *work)
@@ -81,18 +44,13 @@ static void input_polled_device_work(struct work_struct *work)
static int input_open_polled_device(struct input_dev *input)
{
struct input_polled_dev *dev = input_get_drvdata(input);
- int error;
-
- error = input_polldev_start_workqueue();
- if (error)
- return error;
if (dev->open)
dev->open(dev);
/* Only start polling if polling is enabled */
if (dev->poll_interval > 0)
- queue_delayed_work(polldev_wq, &dev->work, 0);
+ queue_delayed_work(system_freezable_wq, &dev->work, 0);
return 0;
}
@@ -102,13 +60,6 @@ static void input_close_polled_device(struct input_dev *input)
struct input_polled_dev *dev = input_get_drvdata(input);
cancel_delayed_work_sync(&dev->work);
- /*
- * Clean up work struct to remove references to the workqueue.
- * It may be destroyed by the next call. This causes problems
- * at next device open-close in case of poll_interval == 0.
- */
- INIT_DELAYED_WORK(&dev->work, dev->work.work.func);
- input_polldev_stop_workqueue();
if (dev->close)
dev->close(dev);
@@ -295,4 +246,3 @@ void input_unregister_polled_device(struct input_polled_dev *dev)
input_unregister_device(dev->input);
}
EXPORT_SYMBOL(input_unregister_polled_device);
-