1 files changed, 95 insertions, 0 deletions
diff --git a/target/linux/s3c24xx/patches/0050-fix-EVIOCGRAB-semantics.patch.patch b/target/linux/s3c24xx/patches/0050-fix-EVIOCGRAB-semantics.patch.patch
new file mode 100755
index 0000000000..5ef328b2f0
--- /dev/null
+++ b/target/linux/s3c24xx/patches/0050-fix-EVIOCGRAB-semantics.patch.patch
@@ -0,0 +1,95 @@
+From 6294c84872b0d26111bdd1b9e5fec41c8a087443 Mon Sep 17 00:00:00 2001
+From: mokopatches <mokopatches@openmoko.org>
+Date: Fri, 25 Jul 2008 22:21:23 +0100
+Subject: [PATCH] fix-EVIOCGRAB-semantics.patch
+
+---
+ drivers/input/evdev.c |   32 +++++++++++++++-----------------
+ 1 files changed, 15 insertions(+), 17 deletions(-)
+
+diff --git a/drivers/input/evdev.c b/drivers/input/evdev.c
+index b32984b..499ffe1 100644
+--- a/drivers/input/evdev.c
++++ b/drivers/input/evdev.c
+@@ -28,7 +28,7 @@ struct evdev {
+ 	char name[16];
+ 	struct input_handle handle;
+ 	wait_queue_head_t wait;
+-	struct evdev_client *grab;
++	int *grab;
+ 	struct list_head client_list;
+ 	spinlock_t client_lock; /* protects client_list */
+ 	struct mutex mutex;
+@@ -39,6 +39,7 @@ struct evdev_client {
+ 	struct input_event buffer[EVDEV_BUFFER_SIZE];
+ 	int head;
+ 	int tail;
++	int grab;
+ 	spinlock_t buffer_lock; /* protects access to buffer, head and tail */
+ 	struct fasync_struct *fasync;
+ 	struct evdev *evdev;
+@@ -79,12 +80,8 @@ static void evdev_event(struct input_handle *handle,
+ 
+ 	rcu_read_lock();
+ 
+-	client = rcu_dereference(evdev->grab);
+-	if (client)
++	list_for_each_entry_rcu(client, &evdev->client_list, node)
+ 		evdev_pass_event(client, &event);
+-	else
+-		list_for_each_entry_rcu(client, &evdev->client_list, node)
+-			evdev_pass_event(client, &event);
+ 
+ 	rcu_read_unlock();
+ 
+@@ -136,14 +133,15 @@ static int evdev_grab(struct evdev *evdev, struct evdev_client *client)
+ {
+ 	int error;
+ 
+-	if (evdev->grab)
++	if (client->grab)
+ 		return -EBUSY;
+ 
+-	error = input_grab_device(&evdev->handle);
+-	if (error)
+-		return error;
+-
+-	rcu_assign_pointer(evdev->grab, client);
++	if (!evdev->grab++) {
++	    error = input_grab_device(&evdev->handle);
++	    if (error)
++		    return error;
++	}
++	client->grab = 1;
+ 	synchronize_rcu();
+ 
+ 	return 0;
+@@ -151,12 +149,12 @@ static int evdev_grab(struct evdev *evdev, struct evdev_client *client)
+ 
+ static int evdev_ungrab(struct evdev *evdev, struct evdev_client *client)
+ {
+-	if (evdev->grab != client)
++	if (!client->grab)
+ 		return  -EINVAL;
+ 
+-	rcu_assign_pointer(evdev->grab, NULL);
+-	synchronize_rcu();
+-	input_release_device(&evdev->handle);
++	if (!--evdev->grab && evdev->exist)
++		input_release_device(&evdev->handle);
++	client->grab = 0;
+ 
+ 	return 0;
+ }
+@@ -231,7 +229,7 @@ static int evdev_release(struct inode *inode, struct file *file)
+ 	struct evdev *evdev = client->evdev;
+ 
+ 	mutex_lock(&evdev->mutex);
+-	if (evdev->grab == client)
++	if (client->grab)
+ 		evdev_ungrab(evdev, client);
+ 	mutex_unlock(&evdev->mutex);
+ 
+-- 
+1.5.6.3
+