Input: uinput - add UI_GET_VERSION ioctl

This ioctl is the counterpart to EVIOCGVERSION and returns the
uinput-version the kernel was compiled with.

Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>
Signed-off-by: David Herrmann <dh.herrmann@gmail.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/drivers/input/misc/uinput.c b/drivers/input/misc/uinput.c
index 883f045f37df..421e29e4cd81 100644
--- a/drivers/input/misc/uinput.c
+++ b/drivers/input/misc/uinput.c
@@ -723,6 +723,12 @@ static long uinput_ioctl_handler(struct file *file, unsigned int cmd,
         }
 
         switch (cmd) {
+                case UI_GET_VERSION:
+                        if (put_user(UINPUT_VERSION,
+                                     (unsigned int __user *)p))
+                                retval = -EFAULT;
+                        goto out;
+
                 case UI_DEV_CREATE:
                         retval = uinput_create_device(udev);
                         goto out;