Input: fix open count handling in input interfaces

If input_open_device() fails we should not leave interfaces marked
as  opened.

Signed-off-by: Oliver Neukum <oneukum@suse.de>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>

1 files changed, 4 insertions, 1 deletions

diff --git a/drivers/input/evdev.c b/drivers/input/evdev.c
index bfee4f9a7715..d404aa8680ea 100644
--- a/drivers/input/evdev.c
+++ b/drivers/input/evdev.c
@@ -192,8 +192,11 @@ static int evdev_open_device(struct evdev *evdev)
 
         if (!evdev->exist)
                 retval = -ENODEV;
-        else if (!evdev->open++)
+        else if (!evdev->open++) {
                 retval = input_open_device(&evdev->handle);
+                if (retval)
+                        evdev->open--;
+        }
 
         mutex_unlock(&evdev->mutex);
         return retval;