r2152 - trunk/oe/packages/linux/linux-gta01

[mickey at sita.openmoko.org]

Author: mickey
Date: 2007-06-04 21:05:54 +0200 (Mon, 04 Jun 2007)
New Revision: 2152

Added:
   trunk/oe/packages/linux/linux-gta01/fix-EVIOCGRAB-semantics.patch
Log:
oe/linux: add patch that fixes the EVIOCGRAB semantics
see http://lkml.org/lkml/2006/8/15/331


Added: trunk/oe/packages/linux/linux-gta01/fix-EVIOCGRAB-semantics.patch
===================================================================
--- trunk/oe/packages/linux/linux-gta01/fix-EVIOCGRAB-semantics.patch	2007-06-04 19:05:07 UTC (rev 2151)
+++ trunk/oe/packages/linux/linux-gta01/fix-EVIOCGRAB-semantics.patch	2007-06-04 19:05:54 UTC (rev 2152)
@@ -0,0 +1,97 @@
+diff --git a/drivers/input/evdev.c b/drivers/input/evdev.c
+index 12c7ab8..c7e741b 100644
+--- a/drivers/input/evdev.c
++++ b/drivers/input/evdev.c
+@@ -29,7 +29,7 @@ struct evdev {
+ 	char name[16];
+ 	struct input_handle handle;
+ 	wait_queue_head_t wait;
+-	struct evdev_list *grab;
++	int grab;
+ 	struct list_head list;
+ };
+ 
+@@ -37,6 +37,7 @@ struct evdev_list {
+ 	struct input_event buffer[EVDEV_BUFFER_SIZE];
+ 	int head;
+ 	int tail;
++	int grab;
+ 	struct fasync_struct *fasync;
+ 	struct evdev *evdev;
+ 	struct list_head node;
+@@ -49,8 +50,7 @@ static void evdev_event(struct input_han
+ 	struct evdev *evdev = handle->private;
+ 	struct evdev_list *list;
+ 
+-	if (evdev->grab) {
+-		list = evdev->grab;
++	list_for_each_entry(list, &evdev->list, node) {
+ 
+ 		do_gettimeofday(&list->buffer[list->head].time);
+ 		list->buffer[list->head].type = type;
+@@ -59,17 +59,7 @@ static void evdev_event(struct input_han
+ 		list->head = (list->head + 1) & (EVDEV_BUFFER_SIZE - 1);
+ 
+ 		kill_fasync(&list->fasync, SIGIO, POLL_IN);
+-	} else
+-		list_for_each_entry(list, &evdev->list, node) {
+-
+-			do_gettimeofday(&list->buffer[list->head].time);
+-			list->buffer[list->head].type = type;
+-			list->buffer[list->head].code = code;
+-			list->buffer[list->head].value = value;
+-			list->head = (list->head + 1) & (EVDEV_BUFFER_SIZE - 1);
+-
+-			kill_fasync(&list->fasync, SIGIO, POLL_IN);
+-		}
++	}
+ 
+ 	wake_up_interruptible(&evdev->wait);
+ }
+@@ -104,9 +94,10 @@ static int evdev_release(struct inode * 
+ {
+ 	struct evdev_list *list = file->private_data;
+ 
+-	if (list->evdev->grab == list) {
+-		input_release_device(&list->evdev->handle);
+-		list->evdev->grab = NULL;
++	if (list->grab) {
++		if(!--list->evdev->grab && list->evdev->exist)
++			input_release_device(&list->evdev->handle);
++		list->grab = 0;
+ 	}
+ 
+ 	evdev_fasync(-1, file, 0);
+@@ -483,17 +474,19 @@ static long evdev_ioctl_handler(struct f
+ 
+ 		case EVIOCGRAB:
+ 			if (p) {
+-				if (evdev->grab)
+-					return -EBUSY;
+-				if (input_grab_device(&evdev->handle))
++				if (list->grab)
+ 					return -EBUSY;
+-				evdev->grab = list;
++				if (!evdev->grab++)
++					if (input_grab_device(&evdev->handle))
++						return -EBUSY;
++				list->grab = 0;
+ 				return 0;
+ 			} else {
+-				if (evdev->grab != list)
++				if (!list->grab)
+ 					return -EINVAL;
+-				input_release_device(&evdev->handle);
+-				evdev->grab = NULL;
++				if (!--evdev->grab)
++					input_release_device(&evdev->handle);
++				list->grab = 0;
+ 				return 0;
+ 			}
+ 
+-
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