[PATCH v5 2/3] of: reserved-memory: Warn for missing static reserved memory regions

[Zijun Hu]

From: Zijun Hu <quic_zijuhu@xxxxxxxxxxx>

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@xxxxxxxxxxxxxxx
Signed-off-by: Zijun Hu <quic_zijuhu@xxxxxxxxxxx>
---
 drivers/of/of_reserved_mem.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/of/of_reserved_mem.c b/drivers/of/of_reserved_mem.c
index 17c57118c4960d8ac502add1904f7f464258f5a1..75e819f66a56139a800dba5e2e0044d0bbeb065e 100644
--- a/drivers/of/of_reserved_mem.c
+++ b/drivers/of/of_reserved_mem.c
@@ -263,6 +263,11 @@ void __init fdt_scan_reserved_mem_reg_nodes(void)
 			       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);
 

-- 
2.34.1