drm/mediatek: Add missing IS_ERR check for ovl_adaptor platform devicegrafted

platform_device_register_data() can fail and return an ERR_PTR, but the
return value is used without checking, leading to an invalid pointer
being stored in ddp_comp[].dev and passed to component_match_add() and
mtk_ddp_comp_init(), which could result in a kernel crash.

Add an IS_ERR() check to jump to the error handling path on failure.

Fixes: 0d9eee9118b7 ("drm/mediatek: Add drm ovl_adaptor sub driver for MT8195")
Cc: stable@vger.kernel.org
Signed-off-by: Haojie Li <lihaojie@kylinos.cn>
Reviewed-by: CK Hu <ck.hu@mediatek.com>
Link: https://patchwork.kernel.org/project/linux-mediatek/patch/20260825100845.438893-1-lihaojie@kylinos.cn/
Signed-off-by: Chun-Kuang Hu <chunkuang.hu@kernel.org>

1 files changed, 52 insertions, 0 deletions

diff --git a/Documentation/fb/index.rst b/Documentation/fb/index.rst
new file mode 100644
index 000000000..fe9ca3570
--- /dev/null
+++ b/Documentation/fb/index.rst
@@ -0,0 +1,52 @@
+.. SPDX-License-Identifier: GPL-2.0
+
+============
+Frame Buffer
+============
+
+General information
+===================
+
+.. toctree::
+   :maxdepth: 1
+
+   api
+   cmap_xfbdev
+   deferred_io
+   fbcon
+   framebuffer
+   internals
+   modedb
+
+Driver documentation
+====================
+
+.. toctree::
+   :maxdepth: 1
+
+   arkfb
+   aty128fb
+   cirrusfb
+   efifb
+   ep93xx-fb
+   gxfb
+   intel810
+   lxfb
+   matroxfb
+   metronomefb
+   pvr2fb
+   pxafb
+   s3fb
+   sa1100fb
+   sh7760fb
+   sisfb
+   sm501
+   sm712fb
+   sstfb
+   tgafb
+   tridentfb
+   udlfb
+   uvesafb
+   vesafb
+   viafb
+   vt8623fb