From bce7698e2e6565bb765bd0522337f29f5f312624 Mon Sep 17 00:00:00 2001 From: Haojie Li Date: Tue, 25 Aug 2026 18:08:45 +0800 Subject: drm/mediatek: Add missing IS_ERR check for ovl_adaptor platform device 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 Reviewed-by: CK Hu Link: https://patchwork.kernel.org/project/linux-mediatek/patch/20260825100845.438893-1-lihaojie@kylinos.cn/ Signed-off-by: Chun-Kuang Hu --- lib/bcd.c | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) create mode 100644 lib/bcd.c (limited to 'lib/bcd.c') diff --git a/lib/bcd.c b/lib/bcd.c new file mode 100644 index 000000000..c5e79ba9c --- /dev/null +++ b/lib/bcd.c @@ -0,0 +1,17 @@ +// SPDX-License-Identifier: GPL-2.0 +#include +#include + +unsigned _bcd2bin(unsigned char val) +{ + return (val & 0x0f) + (val >> 4) * 10; +} +EXPORT_SYMBOL(_bcd2bin); + +unsigned char _bin2bcd(unsigned val) +{ + const unsigned int t = (val * 103) >> 10; + + return (t << 4) | (val - t * 10); +} +EXPORT_SYMBOL(_bin2bcd); -- cgit v1.3.1