i915: return -EFAULT if copy_to_user fails

copy_to_user() returns the number of bytes remaining to be copied and
I'm pretty sure we want to return a negative error code here.

Signed-off-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: stable@kernel.org

1 files changed, 1 insertions, 0 deletions

diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index 68526f467c87..748c26340c35 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -3588,6 +3588,7 @@ i915_gem_do_execbuffer(struct drm_device *dev, void *data,
                 if (ret != 0) {
                         DRM_ERROR("copy %d cliprects failed: %d\n",
                                   args->num_cliprects, ret);
+                        ret = -EFAULT;
                         goto pre_mutex_err;
                 }
         }