Merge tag 'firewire-fixes-6.18-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394

Pull firewire fixes from Takashi Sakamoto:
 "This includes some fixes for the topology map, newly introduced in
  v6.18 kernel"

* tag 'firewire-fixes-6.18-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394:
  firewire: core: fix to update generation field in topology map
  firewire: core: Initialize topology_map.lock

drivers/firewire/core-card.c

diff --git a/drivers/firewire/core-card.c b/drivers/firewire/core-card.c
index e5e0174..66e1106 100644
--- a/drivers/firewire/core-card.c
+++ b/drivers/firewire/core-card.c
@@ -577,6 +577,8 @@ void fw_card_initialize(struct fw_card *card,
 	INIT_LIST_HEAD(&card->transactions.list);
 	spin_lock_init(&card->transactions.lock);
 
+	spin_lock_init(&card->topology_map.lock);
+
 	card->split_timeout.hi = DEFAULT_SPLIT_TIMEOUT / 8000;
 	card->split_timeout.lo = (DEFAULT_SPLIT_TIMEOUT % 8000) << 19;
 	card->split_timeout.cycles = DEFAULT_SPLIT_TIMEOUT;

drivers/firewire/core-topology.c

diff --git a/drivers/firewire/core-topology.c b/drivers/firewire/core-topology.c
index 2f73bcd..ed3ae8c 100644
--- a/drivers/firewire/core-topology.c
+++ b/drivers/firewire/core-topology.c
@@ -441,12 +441,13 @@ static void update_topology_map(__be32 *buffer, size_t buffer_size, int root_nod
 				const u32 *self_ids, int self_id_count)
 {
 	__be32 *map = buffer;
+	u32 next_generation = be32_to_cpu(buffer[1]) + 1;
 	int node_count = (root_node_id & 0x3f) + 1;
 
 	memset(map, 0, buffer_size);
 
 	*map++ = cpu_to_be32((self_id_count + 2) << 16);
-	*map++ = cpu_to_be32(be32_to_cpu(buffer[1]) + 1);
+	*map++ = cpu_to_be32(next_generation);
 	*map++ = cpu_to_be32((node_count << 16) | self_id_count);
 
 	while (self_id_count--)