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 --- include/soc/tegra/pm.h | 72 ++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 72 insertions(+) create mode 100644 include/soc/tegra/pm.h (limited to 'include/soc/tegra/pm.h') diff --git a/include/soc/tegra/pm.h b/include/soc/tegra/pm.h new file mode 100644 index 000000000..ce4d0b1bd --- /dev/null +++ b/include/soc/tegra/pm.h @@ -0,0 +1,72 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Copyright (C) 2014 NVIDIA Corporation + */ + +#ifndef __SOC_TEGRA_PM_H__ +#define __SOC_TEGRA_PM_H__ + +#include + +enum tegra_suspend_mode { + TEGRA_SUSPEND_NONE = 0, + TEGRA_SUSPEND_LP2, /* CPU voltage off */ + TEGRA_SUSPEND_LP1, /* CPU voltage off, DRAM self-refresh */ + TEGRA_SUSPEND_LP0, /* CPU + core voltage off, DRAM self-refresh */ + TEGRA_MAX_SUSPEND_MODE, + TEGRA_SUSPEND_NOT_READY, +}; + +#if defined(CONFIG_PM_SLEEP) && defined(CONFIG_ARM) && defined(CONFIG_ARCH_TEGRA) +enum tegra_suspend_mode +tegra_pm_validate_suspend_mode(enum tegra_suspend_mode mode); + +/* low-level resume entry point */ +void tegra_resume(void); + +int tegra30_pm_secondary_cpu_suspend(unsigned long arg); +void tegra_pm_clear_cpu_in_lp2(void); +void tegra_pm_set_cpu_in_lp2(void); +int tegra_pm_enter_lp2(void); +int tegra_pm_park_secondary_cpu(unsigned long cpu); +void tegra_pm_init_suspend(void); +#else +static inline enum tegra_suspend_mode +tegra_pm_validate_suspend_mode(enum tegra_suspend_mode mode) +{ + return TEGRA_SUSPEND_NONE; +} + +static inline void tegra_resume(void) +{ +} + +static inline int tegra30_pm_secondary_cpu_suspend(unsigned long arg) +{ + return -ENOTSUPP; +} + +static inline void tegra_pm_clear_cpu_in_lp2(void) +{ +} + +static inline void tegra_pm_set_cpu_in_lp2(void) +{ +} + +static inline int tegra_pm_enter_lp2(void) +{ + return -ENOTSUPP; +} + +static inline int tegra_pm_park_secondary_cpu(unsigned long cpu) +{ + return -ENOTSUPP; +} + +static inline void tegra_pm_init_suspend(void) +{ +} +#endif /* CONFIG_PM_SLEEP */ + +#endif /* __SOC_TEGRA_PM_H__ */ -- cgit v1.3.1