drm/vmwgfx: Return error code from vmw_execbuf_copy_fence_user

The function was unconditionally returning 0, and a caller would have to
rely on the returned fence pointer being NULL to detect errors. However,
the function vmw_execbuf_copy_fence_user() would expect a non-zero error
code in that case and would BUG otherwise.

So make sure we return a proper non-zero error code if the fence pointer
returned is NULL.

Cc: <stable@vger.kernel.org>
Fixes: ae2a104058e2: ("vmwgfx: Implement fence objects")
Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Reviewed-by: Deepak Rawat <drawat@vmware.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c b/drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c
index f2d13a72c05d..88b8178d4687 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c
@@ -3570,7 +3570,7 @@ int vmw_execbuf_fence_commands(struct drm_file *file_priv,
                 *p_fence = NULL;
         }
 
-        return 0;
+        return ret;
 }
 
 /**