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, 29 insertions, 0 deletions

diff --git a/drivers/misc/issei/Kconfig b/drivers/misc/issei/Kconfig
new file mode 100644
index 000000000..12a3fd809
--- /dev/null
+++ b/drivers/misc/issei/Kconfig
@@ -0,0 +1,29 @@
+# SPDX-License-Identifier: GPL-2.0
+# Copyright (C) 2023-2026 Intel Corporation
+config INTEL_SSEI
+	tristate "Intel Silicon Security Engine Interface"
+	help
+	  The ISSEI (Intel Silicon Security Engine Interface)
+	  subsystem provides a communication channel between the host and the
+	  Silicon Security Engine.
+	  Enable this driver to get SPDM and other features on Intel client CPUs
+	  released in 2024 (Lunar Lake) or later.
+
+	  If selected, the /dev/isseiX device will be created.
+	  If in doubt, select N.
+
+if INTEL_SSEI
+
+config INTEL_SSEI_HW_HECI
+	tristate "Intel Silicon Security Engine Interface Hardware"
+	depends on X86 && PCI
+	help
+	  HECI interface of communication channel between
+	  the host and the Silicon Security Engine.
+
+	  Implementation of ISSEI communication channel over
+	  the HECI hardware PCI device.
+	  This device is available on Intel client CPUs released in 2024
+	  (Lunar Lake) or later.
+
+endif