diff options
Diffstat (limited to 'drivers/input/evdev.c')
| -rw-r--r-- | drivers/input/evdev.c | 27 |
1 files changed, 26 insertions, 1 deletions
diff --git a/drivers/input/evdev.c b/drivers/input/evdev.c index 3626b1ce460..cfe78597eb6 100644 --- a/drivers/input/evdev.c +++ b/drivers/input/evdev.c @@ -20,7 +20,7 @@ #include <linux/slab.h> #include <linux/module.h> #include <linux/init.h> -#include <linux/input.h> +#include <linux/input/mt.h> #include <linux/major.h> #include <linux/device.h> #include "input-compat.h" @@ -632,6 +632,28 @@ static int evdev_handle_set_keycode_v2(struct input_dev *dev, void __user *p) return input_set_keycode(dev, &ke); } +static int evdev_handle_mt_request(struct input_dev *dev, + unsigned int size, + int __user *ip) +{ + const struct input_mt_slot *mt = dev->mt; + unsigned int code; + int max_slots; + int i; + + if (get_user(code, &ip[0])) + return -EFAULT; + if (!input_is_mt_value(code)) + return -EINVAL; + + max_slots = (size - sizeof(__u32)) / sizeof(__s32); + for (i = 0; i < dev->mtsize && i < max_slots; i++) + if (put_user(input_mt_get_value(&mt[i], code), &ip[1 + i])) + return -EFAULT; + + return 0; +} + static long evdev_do_ioctl(struct file *file, unsigned int cmd, void __user *p, int compat_mode) { @@ -725,6 +747,9 @@ static long evdev_do_ioctl(struct file *file, unsigned int cmd, return bits_to_user(dev->propbit, INPUT_PROP_MAX, size, p, compat_mode); + case EVIOCGMTSLOTS(0): + return evdev_handle_mt_request(dev, size, ip); + case EVIOCGKEY(0): return bits_to_user(dev->key, KEY_MAX, size, p, compat_mode); |