[PATCH] devfs: input

Make sure input always uses devfs_remove.  While at it I've also
remove lots of code duplication - every upper input driver contained
the code surrounding devfs_unregister in two identical copies.

drivers/input/evdev.c

@@ -27,7 +27,6 @@ struct evdev{
 	char name[16];
 	struct input_handle handle;
 	wait_queue_head_t wait;
-	devfs_handle_t devfs;
 	struct list_head list;
 };
 
@@ -76,6 +75,13 @@ static int evdev_flush(struct file * file)
 	return input_flush_device(&list->evdev->handle, file);
 }
 
+static void evdev_free(struct evdev *evdev)
+{
+	devfs_remove("input/event%d", evdev->minor);
+	evdev_table[evdev->minor] = NULL;
+	kfree(evdev);
+}
+
 static int evdev_release(struct inode * inode, struct file * file)
 {
 	struct evdev_list *list = file->private_data;
@@ -84,17 +90,13 @@ static int evdev_release(struct inode * inode, struct file * file)
 	list_del(&list->node);
 
 	if (!--list->evdev->open) {
-		if (list->evdev->exist) {
+		if (list->evdev->exist)
 			input_close_device(&list->evdev->handle);
-		} else {
-			input_unregister_minor(list->evdev->devfs);
-			evdev_table[list->evdev->minor] = NULL;
-			kfree(list->evdev);
-		}
+		else
+			evdev_free(list->evdev);
 	}
 
 	kfree(list);
-
 	return 0;
 }
 
@@ -397,7 +399,7 @@ static struct input_handle *evdev_connect(struct input_handler *handler, struct
 	sprintf(evdev->name, "event%d", minor);
 
 	evdev_table[minor] = evdev;
-	evdev->devfs = input_register_minor("input/event%d", minor, EVDEV_MINOR_BASE);
+	input_register_minor("input/event%d", minor, EVDEV_MINOR_BASE);
 
 	return &evdev->handle;
 }
@@ -411,11 +413,8 @@ static void evdev_disconnect(struct input_handle *handle)
 	if (evdev->open) {
 		input_close_device(handle);
 		wake_up_interruptible(&evdev->wait);
-	} else {
-		input_unregister_minor(evdev->devfs);
-		evdev_table[evdev->minor] = NULL;
-		kfree(evdev);
-	}
+	} else
+		evdev_free(evdev);
 }
 
 static struct input_device_id evdev_ids[] = {

drivers/input/input.c

@@ -32,7 +32,6 @@ EXPORT_SYMBOL(input_unregister_device);
 EXPORT_SYMBOL(input_register_handler);
 EXPORT_SYMBOL(input_unregister_handler);
 EXPORT_SYMBOL(input_register_minor);
-EXPORT_SYMBOL(input_unregister_minor);
 EXPORT_SYMBOL(input_open_device);
 EXPORT_SYMBOL(input_close_device);
 EXPORT_SYMBOL(input_accept_process);
@@ -47,7 +46,6 @@ static LIST_HEAD(input_dev_list);
 static LIST_HEAD(input_handler_list);
 
 static struct input_handler *input_table[8];
-static devfs_handle_t input_devfs_handle;
 
 #ifdef CONFIG_PROC_FS
 static struct proc_dir_entry *proc_bus_input_dir;
@@ -542,20 +540,13 @@ static struct file_operations input_fops = {
 	.open = input_open_file,
 };
 
-devfs_handle_t input_register_minor(char *name, int minor, int minor_base)
+void input_register_minor(char *name, int minor, int minor_base)
 {
 	char devfs_name[16];
-	sprintf(devfs_name, name, minor);
-
-	return devfs_register(NULL, devfs_name, 0,
-			INPUT_MAJOR, minor + minor_base,
-			S_IFCHR|S_IRUGO|S_IWUSR,
-			&input_fops, NULL);
-}
 
-void input_unregister_minor(devfs_handle_t handle)
-{
-	devfs_unregister(handle);
+	sprintf(devfs_name, name, minor);
+	devfs_register(NULL, devfs_name, 0, INPUT_MAJOR, minor_base + minor,
+			S_IFCHR|S_IRUGO|S_IWUSR, &input_fops, NULL);
 }
 
 #ifdef CONFIG_PROC_FS
@@ -699,8 +690,7 @@ static int __init input_init(void)
 		return -EBUSY;
 	}
 
-	input_devfs_handle = devfs_mk_dir("input");
-
+	devfs_mk_dir("input");
 	return 0;
 }
 
@@ -711,7 +701,7 @@ static void __exit input_exit(void)
 	remove_proc_entry("handlers", proc_bus_input_dir);
 	remove_proc_entry("input", proc_bus);
 #endif
-	devfs_unregister(input_devfs_handle);
+	devfs_remove("input");
         if (unregister_chrdev(INPUT_MAJOR, "input"))
                 printk(KERN_ERR "input: can't unregister char major %d", INPUT_MAJOR);
 	devclass_unregister(&input_devclass);

drivers/input/joydev.c

@@ -45,7 +45,6 @@ struct joydev {
 	char name[16];
 	struct input_handle handle;
 	wait_queue_head_t wait;
-	devfs_handle_t devfs;
 	struct list_head list;
 	struct js_corr corr[ABS_MAX];
 	struct JS_DATA_SAVE_TYPE glue;
@@ -141,6 +140,13 @@ static int joydev_fasync(int fd, struct file *file, int on)
 	return retval < 0 ? retval : 0;
 }
 
+static void joydev_free(struct joydev *joydev)
+{
+	devfs_remove("js%d", joydev->minor);
+	joydev_table[joydev->minor] = NULL;
+	kfree(joydev);
+}
+
 static int joydev_release(struct inode * inode, struct file * file)
 {
 	struct joydev_list *list = file->private_data;
@@ -150,17 +156,13 @@ static int joydev_release(struct inode * inode, struct file * file)
 	list_del(&list->node);
 
 	if (!--list->joydev->open) {
-		if (list->joydev->exist) {
+		if (list->joydev->exist)
 			input_close_device(&list->joydev->handle);
-		} else {
-			input_unregister_minor(list->joydev->devfs);
-			joydev_table[list->joydev->minor] = NULL;
-			kfree(list->joydev);
-		}
+		else
+			joydev_free(list->joydev);
 	}
 
 	kfree(list);
-
 	return 0;
 }
 
@@ -442,7 +444,7 @@ static struct input_handle *joydev_connect(struct input_handler *handler, struct
 	}
 
 	joydev_table[minor] = joydev;
-	joydev->devfs = input_register_minor("js%d", minor, JOYDEV_MINOR_BASE);
+	input_register_minor("js%d", minor, JOYDEV_MINOR_BASE);
 
 	return &joydev->handle;
 }
@@ -453,13 +455,10 @@ static void joydev_disconnect(struct input_handle *handle)
 
 	joydev->exist = 0;
 
-	if (joydev->open) {
+	if (joydev->open)
 		input_close_device(handle);	
-	} else {
-		input_unregister_minor(joydev->devfs);
-		joydev_table[joydev->minor] = NULL;
-		kfree(joydev);
-	}
+	else
+		joydev_free(joydev);
 }
 
 static struct input_device_id joydev_ids[] = {

drivers/input/mousedev.c

@@ -46,7 +46,6 @@ struct mousedev {
 	wait_queue_head_t wait;
 	struct list_head list;
 	struct input_handle handle;
-	devfs_handle_t devfs;
 };
 
 struct mousedev_list {
@@ -171,45 +170,52 @@ static int mousedev_fasync(int fd, struct file *file, int on)
 	return retval < 0 ? retval : 0;
 }
 
+static void mousedev_free(struct mousedev *mousedev)
+{
+	devfs_remove("input/mouse%d", mousedev->minor);
+	mousedev_table[mousedev->minor] = NULL;
+	kfree(mousedev);
+}
+
+static int mixdev_release(void)
+{
+	struct input_handle *handle;
+
+	list_for_each_entry(handle, &mousedev_handler.h_list, h_node) {
+		struct mousedev *mousedev = handle->private;
+
+		if (!mousedev->open) {
+			if (mousedev->exist)
+				input_close_device(&mousedev->handle);
+			else
+				mousedev_free(mousedev);
+		}
+	}
+
+	return 0;
+}
+
 static int mousedev_release(struct inode * inode, struct file * file)
 {
 	struct mousedev_list *list = file->private_data;
-	struct input_handle *handle;
-	struct mousedev *mousedev;
 
 	mousedev_fasync(-1, file, 0);
 
 	list_del(&list->node);
 
 	if (!--list->mousedev->open) {
-		if (list->mousedev->minor == MOUSEDEV_MIX) {
-			list_for_each_entry(handle, &mousedev_handler.h_list, h_node) {
-				mousedev = handle->private;
-				if (!mousedev->open) {
-					if (mousedev->exist) {
-						input_close_device(&mousedev->handle);
-					} else {
-						input_unregister_minor(mousedev->devfs);
-						mousedev_table[mousedev->minor] = NULL;
-						kfree(mousedev);
-					}
-				}
-			}
-		} else {
+		if (list->mousedev->minor == MOUSEDEV_MIX)
+			return mixdev_release();
+
 		if (!mousedev_mix.open) {
-				if (list->mousedev->exist) {
+			if (list->mousedev->exist)
 				input_close_device(&list->mousedev->handle);
-				} else {
-					input_unregister_minor(list->mousedev->devfs);
-					mousedev_table[list->mousedev->minor] = NULL;
-					kfree(list->mousedev);
-				}
-			}
+			else
+				mousedev_free(list->mousedev);
 		}
 	}
 	
 	kfree(list);
-
 	return 0;
 }
 
@@ -425,7 +431,7 @@ static struct input_handle *mousedev_connect(struct input_handler *handler, stru
 		input_open_device(&mousedev->handle);
 
 	mousedev_table[minor] = mousedev;
-	mousedev->devfs = input_register_minor("input/mouse%d", minor, MOUSEDEV_MINOR_BASE);
+	input_register_minor("input/mouse%d", minor, MOUSEDEV_MINOR_BASE);
 
 	return &mousedev->handle;
 }
@@ -441,9 +447,7 @@ static void mousedev_disconnect(struct input_handle *handle)
 	} else {
 		if (mousedev_mix.open)
 			input_close_device(handle);
-		input_unregister_minor(mousedev->devfs);
-		mousedev_table[mousedev->minor] = NULL;
-		kfree(mousedev);
+		mousedev_free(mousedev);
 	}
 }
 
@@ -507,7 +511,7 @@ static int __init mousedev_init(void)
 	mousedev_table[MOUSEDEV_MIX] = &mousedev_mix;
 	mousedev_mix.exist = 1;
 	mousedev_mix.minor = MOUSEDEV_MIX;
-	mousedev_mix.devfs = input_register_minor("input/mice", MOUSEDEV_MIX, MOUSEDEV_MINOR_BASE);
+	input_register_minor("input/mice", MOUSEDEV_MIX, MOUSEDEV_MINOR_BASE);
 
 #ifdef CONFIG_INPUT_MOUSEDEV_PSAUX
 	if (!(mousedev_mix.misc = !misc_register(&psaux_mouse)))
@@ -525,7 +529,7 @@ static void __exit mousedev_exit(void)
 	if (mousedev_mix.misc)
 		misc_deregister(&psaux_mouse);
 #endif
-	input_unregister_minor(mousedev_mix.devfs);
+	devfs_remove("input/mice");
 	input_unregister_handler(&mousedev_handler);
 	interface_unregister(&mousedev_intf);
 }

drivers/input/tsdev.c

@@ -57,7 +57,6 @@ struct tsdev {
 	wait_queue_head_t wait;
 	struct list_head list;
 	struct input_handle handle;
-	devfs_handle_t devfs;
 };
 
 /* From Compaq's Touch Screen Specification version 0.2 (draft) */
@@ -115,6 +114,13 @@ static int tsdev_open(struct inode *inode, struct file *file)
 	return 0;
 }
 
+static void tsdev_free(struct tsdev *tsdev)
+{
+	devfs_remove("input/ts%d", tsdev->minor);
+	tsdev_table[tsdev->minor] = NULL;
+	kfree(tsdev);
+}
+
 static int tsdev_release(struct inode *inode, struct file *file)
 {
 	struct tsdev_list *list = file->private_data;
@@ -123,13 +129,10 @@ static int tsdev_release(struct inode *inode, struct file *file)
 	list_del(&list->node);
 
 	if (!--list->tsdev->open) {
-		if (list->tsdev->exist) {
+		if (list->tsdev->exist)
 			input_close_device(&list->tsdev->handle);
-		} else {
-			input_unregister_minor(list->tsdev->devfs);
-			tsdev_table[list->tsdev->minor] = NULL;
-			kfree(list->tsdev);
-		}
+		else
+			tsdev_free(list->tsdev);
 	}
 	kfree(list);
 	return 0;
@@ -325,7 +328,6 @@ static struct input_handle *tsdev_connect(struct input_handler *handler,
 	tsdev->handle.private = tsdev;
 
 	tsdev_table[minor] = tsdev;
-	tsdev->devfs =
 	input_register_minor("input/ts%d", minor, TSDEV_MINOR_BASE);
 
 
@@ -341,11 +343,8 @@ static void tsdev_disconnect(struct input_handle *handle)
 	if (tsdev->open) {
 		input_close_device(handle);
 		wake_up_interruptible(&tsdev->wait);
-	} else {
-		input_unregister_minor(tsdev->devfs);
-		tsdev_table[tsdev->minor] = NULL;
-		kfree(tsdev);
-	}
+	} else
+		tsdev_free(tsdev);
 }
 
 static struct input_device_id tsdev_ids[] = {

include/linux/input.h

@@ -895,8 +895,8 @@ void input_close_device(struct input_handle *);
 int input_accept_process(struct input_handle *handle, struct file *file);
 int input_flush_device(struct input_handle* handle, struct file* file);
 
-devfs_handle_t input_register_minor(char *name, int minor, int minor_base);
-void input_unregister_minor(devfs_handle_t handle);
+/* will go away once devfs_register gets sanitized */
+void input_register_minor(char *name, int minor, int minor_base);
 
 void input_event(struct input_dev *dev, unsigned int type, unsigned int code, int value);