5.4-stable review patch. If anyone has any objections, please let me know.
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From: Zijun Hu quic_zijuhu@quicinc.com
commit 267b21d0bef8e67dbe6c591c9991444e58237ec9 upstream.
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 quic_zijuhu@quicinc.com Link: https://lore.kernel.org/r/20250109-of_core_fix-v4-9-db8a72415b8c@quicinc.com Signed-off-by: Rob Herring (Arm) robh@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/of/of_reserved_mem.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
--- a/drivers/of/of_reserved_mem.c +++ b/drivers/of/of_reserved_mem.c @@ -96,12 +96,12 @@ static int __init __reserved_mem_alloc_s
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); }
/* Need adjust the alignment to satisfy the CMA requirement */