diff options
Diffstat (limited to 'arch/mips/kernel/prom.c')
| -rw-r--r-- | arch/mips/kernel/prom.c | 23 |
1 files changed, 17 insertions, 6 deletions
diff --git a/arch/mips/kernel/prom.c b/arch/mips/kernel/prom.c index 93b8e0b4332f..9e50dc8df2f6 100644 --- a/arch/mips/kernel/prom.c +++ b/arch/mips/kernel/prom.c @@ -1,11 +1,8 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * MIPS support for CONFIG_OF device tree support * * Copyright (C) 2010 Cisco Systems Inc. <dediao@cisco.com> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. */ #include <linux/init.h> @@ -41,13 +38,27 @@ char *mips_get_machine_name(void) #ifdef CONFIG_USE_OF void __init early_init_dt_add_memory_arch(u64 base, u64 size) { - return add_memory_region(base, size, BOOT_MEM_RAM); + if (base >= PHYS_ADDR_MAX) { + pr_warn("Trying to add an invalid memory region, skipped\n"); + return; + } + + /* Truncate the passed memory region instead of type casting */ + if (base + size - 1 >= PHYS_ADDR_MAX || base + size < base) { + pr_warn("Truncate memory region %llx @ %llx to size %llx\n", + size, base, PHYS_ADDR_MAX - base); + size = PHYS_ADDR_MAX - base; + } + + add_memory_region(base, size, BOOT_MEM_RAM); } int __init early_init_dt_reserve_memory_arch(phys_addr_t base, phys_addr_t size, bool nomap) { - add_memory_region(base, size, BOOT_MEM_RESERVED); + add_memory_region(base, size, + nomap ? BOOT_MEM_NOMAP : BOOT_MEM_RESERVED); + return 0; } |