Support using drm_fb_helper_unregister_fbi() in driver.remove prior to
calling drm_fbdev_cma_fini() in drm_driver.release.
Also make drm_fbdev_cma_fini() NULL tolerant.
Cc: Laurent Pinchart <laurent.pinch...@ideasonboard.com>
Signed-off-by: Noralf Trønnes <nor...@tronnes.org>
---
drivers/gpu/drm/drm_fb_cma_helper.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/drm_fb_cma_helper.c
b/drivers/gpu/drm/drm_fb_cma_helper.c
index a5dc586..2030a6f 100644
--- a/drivers/gpu/drm/drm_fb_cma_helper.c
+++ b/drivers/gpu/drm/drm_fb_cma_helper.c
@@ -466,7 +466,13 @@ 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);
+ if (!fbdev_cma)
+ return;
+
+ /* Make sure it hasn't been unregistered already */
+ if (fbdev_cma->fb_helper.fbdev && fbdev_cma->fb_helper.fbdev->dev)
+ drm_fb_helper_unregister_fbi(&fbdev_cma->fb_helper);
+
if (fbdev_cma->fb_helper.fbdev)
drm_fbdev_cma_defio_fini(fbdev_cma->fb_helper.fbdev);
--
2.7.4
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