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, 30 insertions, 0 deletions

diff --git a/drivers/usb/cdns3/Makefile b/drivers/usb/cdns3/Makefile
new file mode 100644
index 000000000..b2e4ba6a4
--- /dev/null
+++ b/drivers/usb/cdns3/Makefile
@@ -0,0 +1,30 @@
+# SPDX-License-Identifier: GPL-2.0
+# define_trace.h needs to know how to find our header
+CFLAGS_cdns3-trace.o				:= -I$(src)
+CFLAGS_cdnsp-trace.o				:= -I$(src)
+
+obj-$(CONFIG_USB_CDNS3)			+= cdns.o
+
+cdns-y					:= core.o drd.o cdns3-plat.o
+cdns-$(CONFIG_USB_CDNS3_HOST)		+= host.o
+
+ifneq ($(CONFIG_USB_CDNS3_GADGET),)
+cdns-y					+= cdns3-gadget.o cdns3-ep0.o \
+					   cdnsp-ring.o cdnsp-gadget.o \
+					   cdnsp-mem.o cdnsp-ep0.o
+endif
+
+ifneq ($(CONFIG_TRACING),)
+ifneq ($(CONFIG_USB_CDNS3_GADGET),)
+cdns-y					+= cdns3-trace.o cdnsp-trace.o
+endif
+endif
+
+##
+# Platform-specific glue layers (PCI wrappers, SoC integration)
+##
+obj-$(CONFIG_USB_CDNS3_PCI_WRAP)		+= cdns3-pci-wrap.o
+obj-$(CONFIG_USB_CDNSP_PCI)			+= cdnsp-pci.o
+obj-$(CONFIG_USB_CDNS3_TI)			+= cdns3-ti.o
+obj-$(CONFIG_USB_CDNS3_IMX)			+= cdns3-imx.o
+obj-$(CONFIG_USB_CDNS3_STARFIVE)		+= cdns3-starfive.o