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/raid/raid6/algos.h | 41 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 41 insertions(+) create mode 100644 lib/raid/raid6/algos.h (limited to 'lib/raid/raid6/algos.h') diff --git a/lib/raid/raid6/algos.h b/lib/raid/raid6/algos.h new file mode 100644 index 000000000..43f636be1 --- /dev/null +++ b/lib/raid/raid6/algos.h @@ -0,0 +1,41 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* + * Copyright 2003 H. Peter Anvin - All Rights Reserved + */ +#ifndef _PQ_IMPL_H +#define _PQ_IMPL_H + +#include +#include + +/* Routine choices */ +struct raid6_calls { + const char *name; + void (*gen_syndrome)(int disks, size_t bytes, void **ptrs); + void (*xor_syndrome)(int disks, int start, int stop, size_t bytes, + void **ptrs); +}; + +struct raid6_recov_calls { + const char *name; + void (*data2)(int disks, size_t bytes, int faila, int failb, + void **ptrs); + void (*datap)(int disks, size_t bytes, int faila, void **ptrs); +}; + +void __init raid6_algo_add(const struct raid6_calls *algo); +void __init raid6_algo_add_default(void); +void __init raid6_recov_algo_add(const struct raid6_recov_calls *algo); + +/* for the kunit test */ +const struct raid6_calls *raid6_algo_find(unsigned int idx); +const struct raid6_recov_calls *raid6_recov_algo_find(unsigned int idx); + +/* generic implementations */ +extern const struct raid6_calls raid6_intx1; +extern const struct raid6_calls raid6_intx2; +extern const struct raid6_calls raid6_intx4; +extern const struct raid6_calls raid6_intx8; +extern const struct raid6_recov_calls raid6_recov_intx1; + +#endif /* _PQ_IMPL_H */ -- cgit v1.3.1