From 267b21d0bef8e67dbe6c591c9991444e58237ec9 Mon Sep 17 00:00:00 2001 From: Zijun Hu Date: Thu, 9 Jan 2025 21:27:00 +0800 Subject: [PATCH] of: reserved-memory: Fix using wrong number of cells to get property 'alignment' MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit According to DT spec, size of property 'alignment' is based on parent node’s #size-cells property. But __reserved_mem_alloc_size() wrongly uses @dt_root_addr_cells to get the property obviously. Fix by using @dt_root_size_cells instead of @dt_root_addr_cells. Fixes: 3f0c82066448 ("drivers: of: add initialization code for dynamic reserved memory") Cc: stable@vger.kernel.org Signed-off-by: Zijun Hu Link: https://lore.kernel.org/r/20250109-of_core_fix-v4-9-db8a72415b8c@quicinc.com Signed-off-by: Rob Herring (Arm) --- drivers/of/of_reserved_mem.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/of/of_reserved_mem.c b/drivers/of/of_reserved_mem.c index 45517b9e57b1..d2753756d7c3 100644 --- a/drivers/of/of_reserved_mem.c +++ b/drivers/of/of_reserved_mem.c @@ -409,12 +409,12 @@ static int __init __reserved_mem_alloc_size(unsigned long node, const char *unam prop = of_get_flat_dt_prop(node, "alignment", &len); if (prop) { - if (len != dt_root_addr_cells * sizeof(__be32)) { + if (len != dt_root_size_cells * sizeof(__be32)) { pr_err("invalid alignment property in '%s' node.\n", uname); return -EINVAL; } - align = dt_mem_next_cell(dt_root_addr_cells, &prop); + align = dt_mem_next_cell(dt_root_size_cells, &prop); } nomap = of_get_flat_dt_prop(node, "no-map", NULL) != NULL;