Allows userspace code to process input events whilethe device appears to be asleep.
Signed-off-by: Arve Hjønnevåg <arve@xxxxxxxxxxx>--- drivers/input/evdev.c | 7 +++++++ 1 files changed, 7 insertions(+), 0 deletions(-)
diff --git a/drivers/input/evdev.c b/drivers/input/evdev.cindex ed8baa0..e24050b 100644--- a/drivers/input/evdev.c+++ b/drivers/input/evdev.c@@ -19,6 +19,7 @@ #include <linux/input.h> #include <linux/major.h> #include <linux/device.h>+#include <linux/wakelock.h> #include "input-compat.h" struct evdev {@@ -43,6 +44,7 @@ struct evdev_client { struct fasync_struct *fasync; struct evdev *evdev; struct list_head node;+ struct wake_lock wake_lock; }; static struct evdev *evdev_table[EVDEV_MINORS];@@ -55,6 +57,7 @@ static void evdev_pass_event(struct evdev_client *client, * Interrupts are disabled, just acquire the lock */ spin_lock(&client->buffer_lock);+ wake_lock_timeout(&client->wake_lock, 5 * HZ); client->buffer[client->head++] = *event; client->head &= EVDEV_BUFFER_SIZE - 1; spin_unlock(&client->buffer_lock);@@ -236,6 +239,7 @@ static int evdev_release(struct inode *inode, struct file *file) mutex_unlock(&evdev->mutex); evdev_detach_client(evdev, client);+ wake_lock_destroy(&client->wake_lock); kfree(client); evdev_close_device(evdev);@@ -272,6 +276,7 @@ static int evdev_open(struct inode *inode, struct file *file) } spin_lock_init(&client->buffer_lock);+ wake_lock_init(&client->wake_lock, WAKE_LOCK_SUSPEND, "evdev"); client->evdev = evdev; evdev_attach_client(evdev, client); @@ -335,6 +340,8 @@ static int evdev_fetch_next_event(struct evdev_client *client, if (have_event) { *event = client->buffer[client->tail++]; client->tail &= EVDEV_BUFFER_SIZE - 1;+ if (client->head == client->tail)+ wake_unlock(&client->wake_lock); } spin_unlock_irq(&client->buffer_lock);-- 1.6.1
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