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path: root/packages/linux/linux-openmoko/fix-EVIOCGRAB-semantics-2.6.22.5.patch
blob: cc74c0e2899f733abc33b046cbb875d56ea76ebe (plain)
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Index: linux-2.6.22.5/drivers/input/evdev.c
===================================================================
--- linux-2.6.22.5.orig/drivers/input/evdev.c
+++ linux-2.6.22.5/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;
 };
 
@@ -36,6 +36,7 @@ struct evdev_client {
 	struct input_event buffer[EVDEV_BUFFER_SIZE];
 	int head;
 	int tail;
+  int grab;
 	struct fasync_struct *fasync;
 	struct evdev *evdev;
 	struct list_head node;
@@ -48,8 +49,7 @@ static void evdev_event(struct input_han
 	struct evdev *evdev = handle->private;
 	struct evdev_client *client;
 
-	if (evdev->grab) {
-		client = evdev->grab;
+  list_for_each_entry(client, &evdev->client_list, node) {
 
 		do_gettimeofday(&client->buffer[client->head].time);
 		client->buffer[client->head].type = type;
@@ -58,17 +58,7 @@ static void evdev_event(struct input_han
 		client->head = (client->head + 1) & (EVDEV_BUFFER_SIZE - 1);
 
 		kill_fasync(&client->fasync, SIGIO, POLL_IN);
-	} else
-		list_for_each_entry(client, &evdev->client_list, node) {
-
-			do_gettimeofday(&client->buffer[client->head].time);
-			client->buffer[client->head].type = type;
-			client->buffer[client->head].code = code;
-			client->buffer[client->head].value = value;
-			client->head = (client->head + 1) & (EVDEV_BUFFER_SIZE - 1);
-
-			kill_fasync(&client->fasync, SIGIO, POLL_IN);
-		}
+	}
 
 	wake_up_interruptible(&evdev->wait);
 }
@@ -105,9 +95,10 @@ static int evdev_release(struct inode *i
 	struct evdev_client *client = file->private_data;
 	struct evdev *evdev = client->evdev;
 
-	if (evdev->grab == client) {
-		input_release_device(&evdev->handle);
-		evdev->grab = NULL;
+	if (client->grab) {
+		if(!--evdev->grab && evdev->exist)
+			input_release_device(&evdev->handle);
+		client->grab = 0;
 	}
 
 	evdev_fasync(-1, file, 0);
@@ -488,17 +479,19 @@ static long evdev_ioctl_handler(struct f
 
 		case EVIOCGRAB:
 			if (p) {
-				if (evdev->grab)
-					return -EBUSY;
-				if (input_grab_device(&evdev->handle))
+				if (client->grab)
 					return -EBUSY;
-				evdev->grab = client;
+				if (!evdev->grab++)
+					if (input_grab_device(&evdev->handle))
+						return -EBUSY;
+				client->grab = 0;
 				return 0;
 			} else {
-				if (evdev->grab != client)
+				if (!client->grab)
 					return -EINVAL;
-				input_release_device(&evdev->handle);
-				evdev->grab = NULL;
+				if (!--evdev->grab)
+					input_release_device(&evdev->handle);
+				client->grab = 0;
 				return 0;
 			}