Input: force feedback - make sure effect is present before playing

Make sure that requested effect id is not out of range for the
device and that effect is present before requesting device to
play it.

Reported-by: Jan Kratochvil <honza@jikos.cz>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>

diff --git a/drivers/input/ff-core.c b/drivers/input/ff-core.c
index 783b3412ceadad32b77430c483ce3375faafc481..eebc72465fc9beb44d2ecfa77a78d24cbd31f891 100644 (file)
--- a/drivers/input/ff-core.c
+++ b/drivers/input/ff-core.c
@@ -281,7 +281,8 @@ int input_ff_event(struct input_dev *dev, unsigned int type,
                break;
 
        default:
-               ff->playback(dev, code, value);
+               if (check_effect_access(ff, code, NULL) == 0)
+                       ff->playback(dev, code, value);
                break;
        }