diff --git a/drivers/firmware/memmap.c b/drivers/firmware/memmap.c
index 1815849f83cb5dd8540d5de6a77a118b237eba31..79f18e6d9c4f346e5f04430a67cf7b1cb7dbd97c 100644
--- a/drivers/firmware/memmap.c
+++ b/drivers/firmware/memmap.c
@@ -286,6 +286,10 @@ int __meminit firmware_map_add_hotplug(u64 start, u64 end, const char *type)
 {
 	struct firmware_map_entry *entry;
 
+	entry = firmware_map_find_entry(start, end - 1, type);
+	if (entry)
+		return 0;
+
 	entry = firmware_map_find_entry_bootmem(start, end - 1, type);
 	if (!entry) {
 		entry = kzalloc(sizeof(struct firmware_map_entry), GFP_ATOMIC);