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, 23 insertions, 0 deletions

diff --git a/lib/fonts/Makefile b/lib/fonts/Makefile
new file mode 100644
index 000000000..7202a70a5
--- /dev/null
+++ b/lib/fonts/Makefile
@@ -0,0 +1,23 @@
+# SPDX-License-Identifier: GPL-2.0
+# Font handling
+
+font-y := fonts.o
+font-$(CONFIG_FRAMEBUFFER_CONSOLE_ROTATION) += font_rotate.o
+
+# Built-in fonts; sorted by Family-Size in ascending order
+font-$(CONFIG_FONT_6x8)       += font_6x8.o
+font-$(CONFIG_FONT_6x10)      += font_6x10.o
+font-$(CONFIG_FONT_6x11)      += font_6x11.o
+font-$(CONFIG_FONT_7x14)      += font_7x14.o
+font-$(CONFIG_FONT_8x8)       += font_8x8.o
+font-$(CONFIG_FONT_8x16)      += font_8x16.o
+font-$(CONFIG_FONT_10x18)     += font_10x18.o
+font-$(CONFIG_FONT_ACORN_8x8) += font_acorn_8x8.o
+font-$(CONFIG_FONT_MINI_4x6)  += font_mini_4x6.o
+font-$(CONFIG_FONT_PEARL_8x8) += font_pearl_8x8.o
+font-$(CONFIG_FONT_SUN8x16)   += font_sun8x16.o
+font-$(CONFIG_FONT_SUN12x22)  += font_sun12x22.o
+font-$(CONFIG_FONT_TER10x18)  += font_ter10x18.o
+font-$(CONFIG_FONT_TER16x32)  += font_ter16x32.o
+
+obj-$(CONFIG_FONT_SUPPORT) += font.o