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path: root/drivers/input/evdev.c
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Diffstat (limited to 'drivers/input/evdev.c')
-rw-r--r--drivers/input/evdev.c100
1 files changed, 80 insertions, 20 deletions
diff --git a/drivers/input/evdev.c b/drivers/input/evdev.c
index 535fea4fe67f..e3f7fc6f9565 100644
--- a/drivers/input/evdev.c
+++ b/drivers/input/evdev.c
@@ -534,6 +534,80 @@ static int handle_eviocgbit(struct input_dev *dev,
}
#undef OLD_KEY_MAX
+static int evdev_handle_get_keycode(struct input_dev *dev,
+ void __user *p, size_t size)
+{
+ struct input_keymap_entry ke;
+ int error;
+
+ memset(&ke, 0, sizeof(ke));
+
+ if (size == sizeof(unsigned int[2])) {
+ /* legacy case */
+ int __user *ip = (int __user *)p;
+
+ if (copy_from_user(ke.scancode, p, sizeof(unsigned int)))
+ return -EFAULT;
+
+ ke.len = sizeof(unsigned int);
+ ke.flags = 0;
+
+ error = input_get_keycode(dev, &ke);
+ if (error)
+ return error;
+
+ if (put_user(ke.keycode, ip + 1))
+ return -EFAULT;
+
+ } else {
+ size = min(size, sizeof(ke));
+
+ if (copy_from_user(&ke, p, size))
+ return -EFAULT;
+
+ error = input_get_keycode(dev, &ke);
+ if (error)
+ return error;
+
+ if (copy_to_user(p, &ke, size))
+ return -EFAULT;
+ }
+ return 0;
+}
+
+static int evdev_handle_set_keycode(struct input_dev *dev,
+ void __user *p, size_t size)
+{
+ struct input_keymap_entry ke;
+
+ memset(&ke, 0, sizeof(ke));
+
+ if (size == sizeof(unsigned int[2])) {
+ /* legacy case */
+ int __user *ip = (int __user *)p;
+
+ if (copy_from_user(ke.scancode, p, sizeof(unsigned int)))
+ return -EFAULT;
+
+ if (get_user(ke.keycode, ip + 1))
+ return -EFAULT;
+
+ ke.len = sizeof(unsigned int);
+ ke.flags = 0;
+
+ } else {
+ size = min(size, sizeof(ke));
+
+ if (copy_from_user(&ke, p, size))
+ return -EFAULT;
+
+ if (ke.len > sizeof(ke.scancode))
+ return -EINVAL;
+ }
+
+ return input_set_keycode(dev, &ke);
+}
+
static long evdev_do_ioctl(struct file *file, unsigned int cmd,
void __user *p, int compat_mode)
{
@@ -580,25 +654,6 @@ static long evdev_do_ioctl(struct file *file, unsigned int cmd,
return 0;
- case EVIOCGKEYCODE:
- if (get_user(t, ip))
- return -EFAULT;
-
- error = input_get_keycode(dev, t, &v);
- if (error)
- return error;
-
- if (put_user(v, ip + 1))
- return -EFAULT;
-
- return 0;
-
- case EVIOCSKEYCODE:
- if (get_user(t, ip) || get_user(v, ip + 1))
- return -EFAULT;
-
- return input_set_keycode(dev, t, v);
-
case EVIOCRMFF:
return input_ff_erase(dev, (int)(unsigned long) p, file);
@@ -620,7 +675,6 @@ static long evdev_do_ioctl(struct file *file, unsigned int cmd,
/* Now check variable-length commands */
#define EVIOC_MASK_SIZE(nr) ((nr) & ~(_IOC_SIZEMASK << _IOC_SIZESHIFT))
-
switch (EVIOC_MASK_SIZE(cmd)) {
case EVIOCGKEY(0):
@@ -654,6 +708,12 @@ static long evdev_do_ioctl(struct file *file, unsigned int cmd,
return -EFAULT;
return error;
+
+ case EVIOC_MASK_SIZE(EVIOCGKEYCODE):
+ return evdev_handle_get_keycode(dev, p, size);
+
+ case EVIOC_MASK_SIZE(EVIOCSKEYCODE):
+ return evdev_handle_set_keycode(dev, p, size);
}
/* Multi-number variable-length handlers */