drm/fb_cma_helper: do not free fbdev if there is none

If fbdev emulation is not in use (or not built-in), fb_helper.fbdev
is NULL. Don't call calling drm_fbdev_cma_defio_fini in this case.

Signed-off-by: Stefan Agner <stefan@agner.ch>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/20161020003221.2941-2-stefan@agner.ch

diff --git a/drivers/gpu/drm/drm_fb_cma_helper.c b/drivers/gpu/drm/drm_fb_cma_helper.c
index fac4f06..4c66644 100644 (file)
--- a/drivers/gpu/drm/drm_fb_cma_helper.c
+++ b/drivers/gpu/drm/drm_fb_cma_helper.c
@@ -560,7 +560,8 @@ EXPORT_SYMBOL_GPL(drm_fbdev_cma_init);
 void drm_fbdev_cma_fini(struct drm_fbdev_cma *fbdev_cma)
 {
        drm_fb_helper_unregister_fbi(&fbdev_cma->fb_helper);
-       drm_fbdev_cma_defio_fini(fbdev_cma->fb_helper.fbdev);
+       if (fbdev_cma->fb_helper.fbdev)
+               drm_fbdev_cma_defio_fini(fbdev_cma->fb_helper.fbdev);
        drm_fb_helper_release_fbi(&fbdev_cma->fb_helper);
 
        if (fbdev_cma->fb) {