Handle return values from interface_register() and misc_register()

in the input drivers.

drivers/input/evbug.c

@@ -95,7 +95,12 @@ static struct device_interface evbug_intf = {
 
 int __init evbug_init(void)
 {
-	interface_register(&evbug_intf);
+	int retval;
+
+	retval = interface_register(&evbug_intf);
+	if(retval < 0)
+		return retval;
+
 	input_register_handler(&evbug_handler);
 	return 0;
 }
@@ -103,7 +108,7 @@ int __init evbug_init(void)
 void __exit evbug_exit(void)
 {
 	input_unregister_handler(&evbug_handler);
-	interface_register(&evbug_intf);
+	interface_unregister(&evbug_intf);
 }
 
 module_init(evbug_init);

drivers/input/evdev.c

@@ -442,7 +442,12 @@ static struct device_interface evdev_intf = {
 
 static int __init evdev_init(void)
 {
-	interface_register(&evdev_intf);
+	int retval;
+
+	retval = interface_register(&evdev_intf);
+	if(retval < 0)
+		return retval;
+
 	input_register_handler(&evdev_handler);
 	return 0;
 }
@@ -450,7 +455,7 @@ static int __init evdev_init(void)
 static void __exit evdev_exit(void)
 {
 	input_unregister_handler(&evdev_handler);
-	interface_register(&evdev_intf);
+	interface_unregister(&evdev_intf);
 }
 
 module_init(evdev_init);

drivers/input/joydev.c

@@ -499,7 +499,12 @@ static struct device_interface joydev_intf = {
 
 static int __init joydev_init(void)
 {
-	interface_register(&joydev_intf);
+	int retval;
+
+	retval = interface_register(&joydev_intf);
+	if(retval < 0)
+		return retval;
+
 	input_register_handler(&joydev_handler);
 	return 0;
 }

drivers/input/mousedev.c

@@ -41,6 +41,7 @@ struct mousedev {
 	int exist;
 	int open;
 	int minor;
+	int misc;
 	char name[16];
 	wait_queue_head_t wait;
 	struct list_head list;
@@ -489,7 +490,11 @@ static struct device_interface mousedev_intf = {
 
 static int __init mousedev_init(void)
 {
-	interface_register(&mousedev_intf);
+	int retval;
+
+	if((retval = interface_register(&mousedev_intf)) < 0)
+		return retval;
+
 	input_register_handler(&mousedev_handler);
 
 	memset(&mousedev_mix, 0, sizeof(struct mousedev));
@@ -499,8 +504,10 @@ static int __init mousedev_init(void)
 	mousedev_mix.exist = 1;
 	mousedev_mix.minor = MOUSEDEV_MIX;
 	mousedev_mix.devfs = input_register_minor("mice", MOUSEDEV_MIX, MOUSEDEV_MINOR_BASE);
+
 #ifdef CONFIG_INPUT_MOUSEDEV_PSAUX
-	misc_register(&psaux_mouse);
+	if (!(mousedev_mix.misc = !misc_register(&psaux_mouse)))
+		printk(KERN_WARNING "mice: could not misc_register the device\n");
 #endif
 
 	printk(KERN_INFO "mice: PS/2 mouse device common for all mice\n");
@@ -511,7 +518,8 @@ static int __init mousedev_init(void)
 static void __exit mousedev_exit(void)
 {
 #ifdef CONFIG_INPUT_MOUSEDEV_PSAUX
-	misc_deregister(&psaux_mouse);
+	if (mousedev_mix.misc)
+		misc_deregister(&psaux_mouse);
 #endif
 	input_unregister_minor(mousedev_mix.devfs);
 	input_unregister_handler(&mousedev_handler);