1 files changed, 3 insertions, 1 deletions

diff --git a/drivers/gpu/drm/drm_drv.c b/drivers/gpu/drm/drm_drv.c
index 90288ec7c284..3644c94c0a17 100644
--- a/drivers/gpu/drm/drm_drv.c
+++ b/drivers/gpu/drm/drm_drv.c
@@ -477,7 +477,9 @@ long drm_ioctl(struct file *filp,
                                 retcode = -EFAULT;
                                 goto err_i1;
                         }
-                }
+                } else
+                        memset(kdata, 0, _IOC_SIZE(cmd));
+
                 if (ioctl->flags & DRM_UNLOCKED)
                         retcode = func(dev, kdata, file_priv);
                 else {