X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=drivers%2Finput%2Fevdev.c;h=ba325f16d07796ede832c45cb81591eb3ee3b788;hb=43bc926fffd92024b46cafaf7350d669ba9ca884;hp=17552a29978b862853e3bacf413547e2237e5931;hpb=cee37fe97739d85991964371c1f3a745c00dd236;p=linux-2.6.git

diff --git a/drivers/input/evdev.c b/drivers/input/evdev.c
index 17552a299..ba325f16d 100644
--- a/drivers/input/evdev.c
+++ b/drivers/input/evdev.c
@@ -20,7 +20,7 @@
 #include <linux/major.h>
 #include <linux/smp_lock.h>
 #include <linux/device.h>
-#include <linux/devfs_fs_kernel.h>
+#include <linux/compat.h>
 
 struct evdev {
 	int exist;
@@ -130,9 +130,8 @@ static int evdev_open(struct inode * inode, struct file * file)
 	if ((accept_err = input_accept_process(&(evdev_table[i]->handle), file)))
 		return accept_err;
 
-	if (!(list = kmalloc(sizeof(struct evdev_list), GFP_KERNEL)))
+	if (!(list = kzalloc(sizeof(struct evdev_list), GFP_KERNEL)))
 		return -ENOMEM;
-	memset(list, 0, sizeof(struct evdev_list));
 
 	list->evdev = evdev_table[i];
 	list_add_tail(&list->node, &evdev_table[i]->list);
@@ -145,20 +144,119 @@ static int evdev_open(struct inode * inode, struct file * file)
 	return 0;
 }
 
+#ifdef CONFIG_COMPAT
+
+struct input_event_compat {
+	struct compat_timeval time;
+	__u16 type;
+	__u16 code;
+	__s32 value;
+};
+
+/* Note to the author of this code: did it ever occur to
+   you why the ifdefs are needed? Think about it again. -AK */
+#ifdef CONFIG_X86_64
+#  define COMPAT_TEST is_compat_task()
+#elif defined(CONFIG_IA64)
+#  define COMPAT_TEST IS_IA32_PROCESS(task_pt_regs(current))
+#elif defined(CONFIG_S390)
+#  define COMPAT_TEST test_thread_flag(TIF_31BIT)
+#elif defined(CONFIG_MIPS)
+#  define COMPAT_TEST (current->thread.mflags & MF_32BIT_ADDR)
+#else
+#  define COMPAT_TEST test_thread_flag(TIF_32BIT)
+#endif
+
+static inline size_t evdev_event_size(void)
+{
+	return COMPAT_TEST ?
+		sizeof(struct input_event_compat) : sizeof(struct input_event);
+}
+
+static int evdev_event_from_user(const char __user *buffer, struct input_event *event)
+{
+	if (COMPAT_TEST) {
+		struct input_event_compat compat_event;
+
+		if (copy_from_user(&compat_event, buffer, sizeof(struct input_event_compat)))
+			return -EFAULT;
+
+		event->time.tv_sec = compat_event.time.tv_sec;
+		event->time.tv_usec = compat_event.time.tv_usec;
+		event->type = compat_event.type;
+		event->code = compat_event.code;
+		event->value = compat_event.value;
+
+	} else {
+		if (copy_from_user(event, buffer, sizeof(struct input_event)))
+			return -EFAULT;
+	}
+
+	return 0;
+}
+
+static int evdev_event_to_user(char __user *buffer, const struct input_event *event)
+{
+	if (COMPAT_TEST) {
+		struct input_event_compat compat_event;
+
+		compat_event.time.tv_sec = event->time.tv_sec;
+		compat_event.time.tv_usec = event->time.tv_usec;
+		compat_event.type = event->type;
+		compat_event.code = event->code;
+		compat_event.value = event->value;
+
+		if (copy_to_user(buffer, &compat_event, sizeof(struct input_event_compat)))
+			return -EFAULT;
+
+	} else {
+		if (copy_to_user(buffer, event, sizeof(struct input_event)))
+			return -EFAULT;
+	}
+
+	return 0;
+}
+
+#else
+
+static inline size_t evdev_event_size(void)
+{
+	return sizeof(struct input_event);
+}
+
+static int evdev_event_from_user(const char __user *buffer, struct input_event *event)
+{
+	if (copy_from_user(event, buffer, sizeof(struct input_event)))
+		return -EFAULT;
+
+	return 0;
+}
+
+static int evdev_event_to_user(char __user *buffer, const struct input_event *event)
+{
+	if (copy_to_user(buffer, event, sizeof(struct input_event)))
+		return -EFAULT;
+
+	return 0;
+}
+
+#endif /* CONFIG_COMPAT */
+
 static ssize_t evdev_write(struct file * file, const char __user * buffer, size_t count, loff_t *ppos)
 {
 	struct evdev_list *list = file->private_data;
 	struct input_event event;
 	int retval = 0;
 
-	if (!list->evdev->exist) return -ENODEV;
+	if (!list->evdev->exist)
+		return -ENODEV;
 
 	while (retval < count) {
 
-		if (copy_from_user(&event, buffer + retval, sizeof(struct input_event)))
+		if (evdev_event_from_user(buffer + retval, &event))
 			return -EFAULT;
 		input_event(list->evdev->handle.dev, event.type, event.code, event.value);
-		retval += sizeof(struct input_event);
+		retval += evdev_event_size();
 	}
 
 	return retval;
@@ -169,7 +267,7 @@ static ssize_t evdev_read(struct file * file, char __user * buffer, size_t count
 	struct evdev_list *list = file->private_data;
 	int retval;
 
-	if (count < sizeof(struct input_event))
+	if (count < evdev_event_size())
 		return -EINVAL;
 
 	if (list->head == list->tail && list->evdev->exist && (file->f_flags & O_NONBLOCK))
@@ -184,11 +282,15 @@ static ssize_t evdev_read(struct file * file, char __user * buffer, size_t count
 	if (!list->evdev->exist)
 		return -ENODEV;
 
-	while (list->head != list->tail && retval + sizeof(struct input_event) <= count) {
-		if (copy_to_user(buffer + retval, list->buffer + list->tail,
-			 sizeof(struct input_event))) return -EFAULT;
+	while (list->head != list->tail && retval + evdev_event_size() <= count) {
+
+		struct input_event *event = (struct input_event *) list->buffer + list->tail;
+
+		if (evdev_event_to_user(buffer + retval, event))
+			return -EFAULT;
+
 		list->tail = (list->tail + 1) & (EVDEV_BUFFER_SIZE - 1);
-		retval += sizeof(struct input_event);
+		retval += evdev_event_size();
 	}
 
 	return retval;
@@ -203,17 +305,95 @@ static unsigned int evdev_poll(struct file *file, poll_table *wait)
 		(list->evdev->exist ? 0 : (POLLHUP | POLLERR));
 }
 
-static int evdev_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
+#ifdef CONFIG_COMPAT
+
+#define BITS_PER_LONG_COMPAT (sizeof(compat_long_t) * 8)
+#define NBITS_COMPAT(x) ((((x) - 1) / BITS_PER_LONG_COMPAT) + 1)
+
+#ifdef __BIG_ENDIAN
+static int bits_to_user(unsigned long *bits, unsigned int maxbit,
+			unsigned int maxlen, void __user *p, int compat)
+{
+	int len, i;
+
+	if (compat) {
+		len = NBITS_COMPAT(maxbit) * sizeof(compat_long_t);
+		if (len < maxlen)
+			len = maxlen;
+
+		for (i = 0; i < len / sizeof(compat_long_t); i++)
+			if (copy_to_user((compat_long_t __user *) p + i,
+					 (compat_long_t *) bits +
+						i + 1 - ((i % 2) << 1),
+					 sizeof(compat_long_t)))
+				return -EFAULT;
+	} else {
+		len = NBITS(maxbit) * sizeof(long);
+		if (len > maxlen)
+			len = maxlen;
+
+		if (copy_to_user(p, bits, len))
+			return -EFAULT;
+	}
+
+	return len;
+}
+#else
+static int bits_to_user(unsigned long *bits, unsigned int maxbit,
+			unsigned int maxlen, void __user *p, int compat)
+{
+	int len = compat ?
+			NBITS_COMPAT(maxbit) * sizeof(compat_long_t) :
+			NBITS(maxbit) * sizeof(long);
+
+	if (len > maxlen)
+		len = maxlen;
+
+	return copy_to_user(p, bits, len) ? -EFAULT : len;
+}
+#endif /* __BIG_ENDIAN */
+
+#else
+
+static int bits_to_user(unsigned long *bits, unsigned int maxbit,
+			unsigned int maxlen, void __user *p, int compat)
+{
+	int len = NBITS(maxbit) * sizeof(long);
+
+	if (len > maxlen)
+		len = maxlen;
+
+	return copy_to_user(p, bits, len) ? -EFAULT : len;
+}
+
+#endif /* CONFIG_COMPAT */
+
+static int str_to_user(const char *str, unsigned int maxlen, void __user *p)
+{
+	int len;
+
+	if (!str)
+		return -ENOENT;
+
+	len = strlen(str) + 1;
+	if (len > maxlen)
+		len = maxlen;
+
+	return copy_to_user(p, str, len) ? -EFAULT : len;
+}
+
+static long evdev_ioctl_handler(struct file *file, unsigned int cmd,
+				void __user *p, int compat_mode)
 {
 	struct evdev_list *list = file->private_data;
 	struct evdev *evdev = list->evdev;
 	struct input_dev *dev = evdev->handle.dev;
 	struct input_absinfo abs;
-	void __user *p = (void __user *)arg;
-	int __user *ip = (int __user *)arg;
+	int __user *ip = (int __user *)p;
 	int i, t, u, v;
 
-	if (!evdev->exist) return -ENODEV;
+	if (!evdev->exist)
+		return -ENODEV;
 
 	switch (cmd) {
 
@@ -221,25 +401,60 @@ static int evdev_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
 			return put_user(EV_VERSION, ip);
 
 		case EVIOCGID:
-			return copy_to_user(p, &dev->id, sizeof(struct input_id)) ? -EFAULT : 0;
+			if (copy_to_user(p, &dev->id, sizeof(struct input_id)))
+				return -EFAULT;
+			return 0;
+
+		case EVIOCGREP:
+			if (!test_bit(EV_REP, dev->evbit))
+				return -ENOSYS;
+			if (put_user(dev->rep[REP_DELAY], ip))
+				return -EFAULT;
+			if (put_user(dev->rep[REP_PERIOD], ip + 1))
+				return -EFAULT;
+			return 0;
+
+		case EVIOCSREP:
+			if (!test_bit(EV_REP, dev->evbit))
+				return -ENOSYS;
+			if (get_user(u, ip))
+				return -EFAULT;
+			if (get_user(v, ip + 1))
+				return -EFAULT;
+
+			input_event(dev, EV_REP, REP_DELAY, u);
+			input_event(dev, EV_REP, REP_PERIOD, v);
+
+			return 0;
 
 		case EVIOCGKEYCODE:
-			if (get_user(t, ip)) return -EFAULT;
-			if (t < 0 || t >= dev->keycodemax || !dev->keycodesize) return -EINVAL;
-			if (put_user(INPUT_KEYCODE(dev, t), ip + 1)) return -EFAULT;
+			if (get_user(t, ip))
+				return -EFAULT;
+			if (t < 0 || t >= dev->keycodemax || !dev->keycodesize)
+				return -EINVAL;
+			if (put_user(INPUT_KEYCODE(dev, t), ip + 1))
+				return -EFAULT;
 			return 0;
 
 		case EVIOCSKEYCODE:
-			if (get_user(t, ip)) return -EFAULT;
-			if (t < 0 || t >= dev->keycodemax || !dev->keycodesize) return -EINVAL;
-			if (get_user(v, ip + 1)) return -EFAULT;
-			if (v < 0 || v > KEY_MAX) return -EINVAL;
+			if (get_user(t, ip))
+				return -EFAULT;
+			if (t < 0 || t >= dev->keycodemax || !dev->keycodesize)
+				return -EINVAL;
+			if (get_user(v, ip + 1))
+				return -EFAULT;
+			if (v < 0 || v > KEY_MAX)
+				return -EINVAL;
+			if (dev->keycodesize < sizeof(v) && (v >> (dev->keycodesize * 8)))
+				return -EINVAL;
+
 			u = SET_INPUT_KEYCODE(dev, t, v);
 			clear_bit(u, dev->keybit);
 			set_bit(v, dev->keybit);
 			for (i = 0; i < dev->keycodemax; i++)
-				if (INPUT_KEYCODE(dev,i) == u)
+				if (INPUT_KEYCODE(dev, i) == u)
 					set_bit(u, dev->keybit);
+
 			return 0;
 
 		case EVIOCSFF:
@@ -250,17 +465,17 @@ static int evdev_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
 				if (copy_from_user(&effect, p, sizeof(effect)))
 					return -EFAULT;
 				err = dev->upload_effect(dev, &effect);
-				if (put_user(effect.id, &(((struct ff_effect __user *)arg)->id)))
+				if (put_user(effect.id, &(((struct ff_effect __user *)p)->id)))
 					return -EFAULT;
 				return err;
-			}
-			else return -ENOSYS;
+			} else
+				return -ENOSYS;
 
 		case EVIOCRMFF:
-			if (dev->erase_effect) {
-				return dev->erase_effect(dev, (int)arg);
-			}
-			else return -ENOSYS;
+			if (!dev->erase_effect)
+				return -ENOSYS;
+
+			return dev->erase_effect(dev, (int)(unsigned long) p);
 
 		case EVIOCGEFFECTS:
 			if (put_user(dev->ff_effects_max, ip))
@@ -268,7 +483,7 @@ static int evdev_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
 			return 0;
 
 		case EVIOCGRAB:
-			if (arg) {
+			if (p) {
 				if (evdev->grab)
 					return -EBUSY;
 				if (input_grab_device(&evdev->handle))
@@ -285,110 +500,108 @@ static int evdev_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
 
 		default:
 
-			if (_IOC_TYPE(cmd) != 'E' || _IOC_DIR(cmd) != _IOC_READ)
+			if (_IOC_TYPE(cmd) != 'E')
 				return -EINVAL;
 
-			if ((_IOC_NR(cmd) & ~EV_MAX) == _IOC_NR(EVIOCGBIT(0,0))) {
-
-				long *bits;
-				int len;
-
-				switch (_IOC_NR(cmd) & EV_MAX) {
-					case      0: bits = dev->evbit;  len = EV_MAX;  break;
-					case EV_KEY: bits = dev->keybit; len = KEY_MAX; break;
-					case EV_REL: bits = dev->relbit; len = REL_MAX; break;
-					case EV_ABS: bits = dev->absbit; len = ABS_MAX; break;
-					case EV_MSC: bits = dev->mscbit; len = MSC_MAX; break;
-					case EV_LED: bits = dev->ledbit; len = LED_MAX; break;
-					case EV_SND: bits = dev->sndbit; len = SND_MAX; break;
-					case EV_FF:  bits = dev->ffbit;  len = FF_MAX;  break;
-					default: return -EINVAL;
+			if (_IOC_DIR(cmd) == _IOC_READ) {
+
+				if ((_IOC_NR(cmd) & ~EV_MAX) == _IOC_NR(EVIOCGBIT(0,0))) {
+
+					long *bits;
+					int len;
+
+					switch (_IOC_NR(cmd) & EV_MAX) {
+						case      0: bits = dev->evbit;  len = EV_MAX;  break;
+						case EV_KEY: bits = dev->keybit; len = KEY_MAX; break;
+						case EV_REL: bits = dev->relbit; len = REL_MAX; break;
+						case EV_ABS: bits = dev->absbit; len = ABS_MAX; break;
+						case EV_MSC: bits = dev->mscbit; len = MSC_MAX; break;
+						case EV_LED: bits = dev->ledbit; len = LED_MAX; break;
+						case EV_SND: bits = dev->sndbit; len = SND_MAX; break;
+						case EV_FF:  bits = dev->ffbit;  len = FF_MAX;  break;
+						case EV_SW:  bits = dev->swbit;  len = SW_MAX;  break;
+						default: return -EINVAL;
+					}
+					return bits_to_user(bits, len, _IOC_SIZE(cmd), p, compat_mode);
 				}
-				len = NBITS(len) * sizeof(long);
-				if (len > _IOC_SIZE(cmd)) len = _IOC_SIZE(cmd);
-				return copy_to_user(p, bits, len) ? -EFAULT : len;
-			}
 
-			if (_IOC_NR(cmd) == _IOC_NR(EVIOCGKEY(0))) {
-				int len;
-				len = NBITS(KEY_MAX) * sizeof(long);
-				if (len > _IOC_SIZE(cmd)) len = _IOC_SIZE(cmd);
-				return copy_to_user(p, dev->key, len) ? -EFAULT : len;
-			}
+				if (_IOC_NR(cmd) == _IOC_NR(EVIOCGKEY(0)))
+					return bits_to_user(dev->key, KEY_MAX, _IOC_SIZE(cmd),
+							    p, compat_mode);
 
-			if (_IOC_NR(cmd) == _IOC_NR(EVIOCGLED(0))) {
-				int len;
-				len = NBITS(LED_MAX) * sizeof(long);
-				if (len > _IOC_SIZE(cmd)) len = _IOC_SIZE(cmd);
-				return copy_to_user(p, dev->led, len) ? -EFAULT : len;
-			}
+				if (_IOC_NR(cmd) == _IOC_NR(EVIOCGLED(0)))
+					return bits_to_user(dev->led, LED_MAX, _IOC_SIZE(cmd),
+							    p, compat_mode);
 
-			if (_IOC_NR(cmd) == _IOC_NR(EVIOCGSND(0))) {
-				int len;
-				len = NBITS(SND_MAX) * sizeof(long);
-				if (len > _IOC_SIZE(cmd)) len = _IOC_SIZE(cmd);
-				return copy_to_user(p, dev->snd, len) ? -EFAULT : len;
-			}
+				if (_IOC_NR(cmd) == _IOC_NR(EVIOCGSND(0)))
+					return bits_to_user(dev->snd, SND_MAX, _IOC_SIZE(cmd),
+							    p, compat_mode);
 
-			if (_IOC_NR(cmd) == _IOC_NR(EVIOCGNAME(0))) {
-				int len;
-				if (!dev->name) return -ENOENT;
-				len = strlen(dev->name) + 1;
-				if (len > _IOC_SIZE(cmd)) len = _IOC_SIZE(cmd);
-				return copy_to_user(p, dev->name, len) ? -EFAULT : len;
-			}
+				if (_IOC_NR(cmd) == _IOC_NR(EVIOCGSW(0)))
+					return bits_to_user(dev->sw, SW_MAX, _IOC_SIZE(cmd),
+							    p, compat_mode);
 
-			if (_IOC_NR(cmd) == _IOC_NR(EVIOCGPHYS(0))) {
-				int len;
-				if (!dev->phys) return -ENOENT;
-				len = strlen(dev->phys) + 1;
-				if (len > _IOC_SIZE(cmd)) len = _IOC_SIZE(cmd);
-				return copy_to_user(p, dev->phys, len) ? -EFAULT : len;
-			}
+				if (_IOC_NR(cmd) == _IOC_NR(EVIOCGNAME(0)))
+					return str_to_user(dev->name, _IOC_SIZE(cmd), p);
 
-			if (_IOC_NR(cmd) == _IOC_NR(EVIOCGUNIQ(0))) {
-				int len;
-				if (!dev->uniq) return -ENOENT;
-				len = strlen(dev->uniq) + 1;
-				if (len > _IOC_SIZE(cmd)) len = _IOC_SIZE(cmd);
-				return copy_to_user(p, dev->uniq, len) ? -EFAULT : len;
-			}
+				if (_IOC_NR(cmd) == _IOC_NR(EVIOCGPHYS(0)))
+					return str_to_user(dev->phys, _IOC_SIZE(cmd), p);
 
-			if ((_IOC_NR(cmd) & ~ABS_MAX) == _IOC_NR(EVIOCGABS(0))) {
+				if (_IOC_NR(cmd) == _IOC_NR(EVIOCGUNIQ(0)))
+					return str_to_user(dev->uniq, _IOC_SIZE(cmd), p);
 
-				int t = _IOC_NR(cmd) & ABS_MAX;
+				if ((_IOC_NR(cmd) & ~ABS_MAX) == _IOC_NR(EVIOCGABS(0))) {
 
-				abs.value = dev->abs[t];
-				abs.minimum = dev->absmin[t];
-				abs.maximum = dev->absmax[t];
-				abs.fuzz = dev->absfuzz[t];
-				abs.flat = dev->absflat[t];
+					int t = _IOC_NR(cmd) & ABS_MAX;
 
-				if (copy_to_user(p, &abs, sizeof(struct input_absinfo)))
-					return -EFAULT;
+					abs.value = dev->abs[t];
+					abs.minimum = dev->absmin[t];
+					abs.maximum = dev->absmax[t];
+					abs.fuzz = dev->absfuzz[t];
+					abs.flat = dev->absflat[t];
+
+					if (copy_to_user(p, &abs, sizeof(struct input_absinfo)))
+						return -EFAULT;
+
+					return 0;
+				}
 
-				return 0;
 			}
 
-			if ((_IOC_NR(cmd) & ~ABS_MAX) == _IOC_NR(EVIOCSABS(0))) {
+			if (_IOC_DIR(cmd) == _IOC_WRITE) {
 
-				int t = _IOC_NR(cmd) & ABS_MAX;
+				if ((_IOC_NR(cmd) & ~ABS_MAX) == _IOC_NR(EVIOCSABS(0))) {
 
-				if (copy_from_user(&abs, p, sizeof(struct input_absinfo)))
-					return -EFAULT;
+					int t = _IOC_NR(cmd) & ABS_MAX;
 
-				dev->abs[t] = abs.value;
-				dev->absmin[t] = abs.minimum;
-				dev->absmax[t] = abs.maximum;
-				dev->absfuzz[t] = abs.fuzz;
-				dev->absflat[t] = abs.flat;
+					if (copy_from_user(&abs, p, sizeof(struct input_absinfo)))
+						return -EFAULT;
 
-				return 0;
+					dev->abs[t] = abs.value;
+					dev->absmin[t] = abs.minimum;
+					dev->absmax[t] = abs.maximum;
+					dev->absfuzz[t] = abs.fuzz;
+					dev->absflat[t] = abs.flat;
+
+					return 0;
+				}
 			}
 	}
 	return -EINVAL;
 }
 
+static long evdev_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
+{
+	return evdev_ioctl_handler(file, cmd, (void __user *)arg, 0);
+}
+
+#ifdef CONFIG_COMPAT
+static long evdev_ioctl_compat(struct file *file, unsigned int cmd, unsigned long arg)
+{
+	return evdev_ioctl_handler(file, cmd, compat_ptr(arg), 1);
+}
+#endif
+
 static struct file_operations evdev_fops = {
 	.owner =	THIS_MODULE,
 	.read =		evdev_read,
@@ -396,7 +609,10 @@ static struct file_operations evdev_fops = {
 	.poll =		evdev_poll,
 	.open =		evdev_open,
 	.release =	evdev_release,
-	.ioctl =	evdev_ioctl,
+	.unlocked_ioctl = evdev_ioctl,
+#ifdef CONFIG_COMPAT
+	.compat_ioctl =	evdev_ioctl_compat,
+#endif
 	.fasync =	evdev_fasync,
 	.flush =	evdev_flush
 };
@@ -404,6 +620,7 @@ static struct file_operations evdev_fops = {
 static struct input_handle *evdev_connect(struct input_handler *handler, struct input_dev *dev, struct input_device_id *id)
 {
 	struct evdev *evdev;
+	struct class_device *cdev;
 	int minor;
 
 	for (minor = 0; minor < EVDEV_MINORS && evdev_table[minor]; minor++);
@@ -412,9 +629,8 @@ static struct input_handle *evdev_connect(struct input_handler *handler, struct
 		return NULL;
 	}
 
-	if (!(evdev = kmalloc(sizeof(struct evdev), GFP_KERNEL)))
+	if (!(evdev = kzalloc(sizeof(struct evdev), GFP_KERNEL)))
 		return NULL;
-	memset(evdev, 0, sizeof(struct evdev));
 
 	INIT_LIST_HEAD(&evdev->list);
 	init_waitqueue_head(&evdev->wait);
@@ -429,11 +645,13 @@ static struct input_handle *evdev_connect(struct input_handler *handler, struct
 
 	evdev_table[minor] = evdev;
 
-	devfs_mk_cdev(MKDEV(INPUT_MAJOR, EVDEV_MINOR_BASE + minor),
-			S_IFCHR|S_IRUGO|S_IWUSR, "input/event%d", minor);
-	class_simple_device_add(input_class,
-				MKDEV(INPUT_MAJOR, EVDEV_MINOR_BASE + minor),
-				dev->dev, "event%d", minor);
+	cdev = class_device_create(&input_class, &dev->cdev,
+			MKDEV(INPUT_MAJOR, EVDEV_MINOR_BASE + minor),
+			dev->cdev.dev, evdev->name);
+
+	/* temporary symlink to keep userspace happy */
+	sysfs_create_link(&input_class.subsys.kset.kobj, &cdev->kobj,
+			  evdev->name);
 
 	return &evdev->handle;
 }
@@ -443,8 +661,9 @@ static void evdev_disconnect(struct input_handle *handle)
 	struct evdev *evdev = handle->private;
 	struct evdev_list *list;
 
-	class_simple_device_remove(MKDEV(INPUT_MAJOR, EVDEV_MINOR_BASE + evdev->minor));
-	devfs_remove("input/event%d", evdev->minor);
+	sysfs_remove_link(&input_class.subsys.kset.kobj, evdev->name);
+	class_device_destroy(&input_class,
+			MKDEV(INPUT_MAJOR, EVDEV_MINOR_BASE + evdev->minor));
 	evdev->exist = 0;
 
 	if (evdev->open) {