6.12-stable review patch. If anyone has any objections, please let me know.
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From: Zijun Hu quic_zijuhu@quicinc.com
commit 81dfedd5234b42df11a473eefe7328ea4a0416ad upstream.
For child node of /reserved-memory, its property 'reg' may contain multiple regions, but fdt_scan_reserved_mem_reg_nodes() only takes into account the first region, and miss remaining regions.
But there are no simple approach to fix it, so give user warning message when miss remaining regions.
Fixes: 8a6e02d0c00e ("of: reserved_mem: Restructure how the reserved memory regions are processed") Cc: stable@vger.kernel.org Signed-off-by: Zijun Hu quic_zijuhu@quicinc.com Reviewed-by: Krzysztof Kozlowski krzk@kernel.org Link: https://lore.kernel.org/r/20250114-of_core_fix-v5-2-b8bafd00a86f@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 | 5 +++++ 1 file changed, 5 insertions(+)
--- a/drivers/of/of_reserved_mem.c +++ b/drivers/of/of_reserved_mem.c @@ -214,6 +214,11 @@ void __init fdt_scan_reserved_mem_reg_no uname); continue; } + + if (len > t_len) + pr_warn("%s() ignores %d regions in node '%s'\n", + __func__, len / t_len - 1, uname); + base = dt_mem_next_cell(dt_root_addr_cells, &prop); size = dt_mem_next_cell(dt_root_size_cells, &prop);