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68 lines
2.0 KiB
Diff
68 lines
2.0 KiB
Diff
From 0d1077627288e51b5604f270eae6cf9f5ccd3871 Mon Sep 17 00:00:00 2001
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From: =?utf-8?q?Arve=20Hj=C3=B8nnev=C3=A5g?= <arve@android.com>
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Date: Fri, 17 Oct 2008 15:20:55 -0700
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Subject: [PATCH 087/134] Input: Hold wake lock while event queue is not empty.
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MIME-Version: 1.0
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Content-Type: text/plain; charset=utf-8
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Content-Transfer-Encoding: 8bit
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Allows userspace code to process input events while
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the device appears to be asleep.
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Signed-off-by: Arve Hjønnevåg <arve@android.com>
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---
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drivers/input/evdev.c | 7 +++++++
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1 files changed, 7 insertions(+), 0 deletions(-)
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--- a/drivers/input/evdev.c
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+++ b/drivers/input/evdev.c
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@@ -19,6 +19,7 @@
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#include <linux/input.h>
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#include <linux/major.h>
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#include <linux/device.h>
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+#include <linux/wakelock.h>
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#include "input-compat.h"
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struct evdev {
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@@ -43,6 +44,7 @@ struct evdev_client {
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struct fasync_struct *fasync;
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struct evdev *evdev;
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struct list_head node;
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+ struct wake_lock wake_lock;
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};
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static struct evdev *evdev_table[EVDEV_MINORS];
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@@ -55,6 +57,7 @@ static void evdev_pass_event(struct evde
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* Interrupts are disabled, just acquire the lock
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*/
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spin_lock(&client->buffer_lock);
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+ wake_lock_timeout(&client->wake_lock, 5 * HZ);
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client->buffer[client->head++] = *event;
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client->head &= EVDEV_BUFFER_SIZE - 1;
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spin_unlock(&client->buffer_lock);
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@@ -233,6 +236,7 @@ static int evdev_release(struct inode *i
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mutex_unlock(&evdev->mutex);
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evdev_detach_client(evdev, client);
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+ wake_lock_destroy(&client->wake_lock);
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kfree(client);
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evdev_close_device(evdev);
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@@ -269,6 +273,7 @@ static int evdev_open(struct inode *inod
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}
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spin_lock_init(&client->buffer_lock);
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+ wake_lock_init(&client->wake_lock, WAKE_LOCK_SUSPEND, "evdev");
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client->evdev = evdev;
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evdev_attach_client(evdev, client);
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@@ -332,6 +337,8 @@ static int evdev_fetch_next_event(struct
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if (have_event) {
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*event = client->buffer[client->tail++];
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client->tail &= EVDEV_BUFFER_SIZE - 1;
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+ if (client->head == client->tail)
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+ wake_unlock(&client->wake_lock);
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}
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spin_unlock_irq(&client->buffer_lock);
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