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 --- block/blk-wbt.h | 30 ++++++++++++++++++++++++++++++ 1 file changed, 30 insertions(+) create mode 100644 block/blk-wbt.h (limited to 'block/blk-wbt.h') diff --git a/block/blk-wbt.h b/block/blk-wbt.h new file mode 100644 index 000000000..6e39da172 --- /dev/null +++ b/block/blk-wbt.h @@ -0,0 +1,30 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef WB_THROTTLE_H +#define WB_THROTTLE_H + +#ifdef CONFIG_BLK_WBT + +void wbt_init_enable_default(struct gendisk *disk); +void wbt_disable_default(struct gendisk *disk); +void wbt_enable_default(struct gendisk *disk); + +u64 wbt_get_min_lat(struct request_queue *q); +bool wbt_disabled(struct request_queue *q); +int wbt_set_lat(struct gendisk *disk, s64 val); + +#else + +static inline void wbt_init_enable_default(struct gendisk *disk) +{ +} + +static inline void wbt_disable_default(struct gendisk *disk) +{ +} +static inline void wbt_enable_default(struct gendisk *disk) +{ +} + +#endif /* CONFIG_BLK_WBT */ + +#endif -- cgit v1.3.1