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, 26 insertions, 0 deletions

diff --git a/drivers/misc/keba/Kconfig b/drivers/misc/keba/Kconfig
new file mode 100644
index 000000000..d6d47197a
--- /dev/null
+++ b/drivers/misc/keba/Kconfig
@@ -0,0 +1,26 @@
+# SPDX-License-Identifier: GPL-2.0
+config KEBA_CP500
+	tristate "KEBA CP500 system FPGA support"
+	depends on X86_64 || ARM64 || COMPILE_TEST
+	depends on PCI
+	depends on I2C
+	select AUXILIARY_BUS
+	help
+	  This driver supports the KEBA CP500 system FPGA, which is used in
+	  KEBA CP500 devices. It registers all sub devices present on the CP500
+	  system FPGA as separate devices. A driver is needed for each sub
+	  device.
+
+	  This driver can also be built as a module. If so, the module will be
+	  called cp500.
+
+config KEBA_LAN9252
+	tristate "KEBA CP500 LAN9252 configuration"
+	depends on SPI
+	depends on KEBA_CP500 || COMPILE_TEST
+	help
+	  This driver is used for updating the configuration of the LAN9252
+	  controller on KEBA CP500 devices.
+
+	  This driver can also be built as a module. If so, the module will be
+	  called lan9252.