Subject: [PATCH v3 04/11] of: reserved_mem: zero total_reserved_mem_cnt if no valid /reserved-memory entry

From: Wandun Chen <[email-masked]>
Date: Wed, 27 May 2026 11:29:10 +0800

From: Wandun Chen <[email-masked]>

Prepare for storing /memreserve/ entries in the reserved_mem array.
Zero total_reserved_mem_cnt if no valid /reserved-memory entry,
instead of keeping it's initial value of MAX_RESERVED_REGIONS, this
allows accounting /memreserve entries based on total_reserved_mem_cnt
in a follow-up patch.

No functional change.

Signed-off-by: Wandun Chen <[email-masked]>
---
 drivers/of/of_reserved_mem.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/of/of_reserved_mem.c b/drivers/of/of_reserved_mem.c
index 6d479381ff1f..05defc91e901 100644
--- a/drivers/of/of_reserved_mem.c
+++ b/drivers/of/of_reserved_mem.c
@@ -329,11 +329,14 @@ int __init fdt_scan_reserved_mem(void)
 	const void *fdt = initial_boot_params;
 
 	node = fdt_path_offset(fdt, "/reserved-memory");
-	if (node < 0)
+	if (node < 0) {
+		total_reserved_mem_cnt = 0;
 		return -ENODEV;
+	}
 
 	if (__reserved_mem_check_root(node) != 0) {
 		pr_err("Reserved memory: unsupported node format, ignoring\n");
+		total_reserved_mem_cnt = 0;
 		return -EINVAL;
 	}
 
-- 
2.43.0