Revert "firewire: core: disable bus management work temporarily during updating topology"

This reverts commit abe7159.

The bus manager work item acquires the spin lock of fw_card again, thus
no need to serialize it against fw_core_handle_bus_reset().

Link: https://lore.kernel.org/r/20250924131823.262136-3-o-takashi@sakamocchi.jp
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>

Author: takaswie

drivers/firewire/core-topology.c

@@ -460,14 +460,8 @@ void fw_core_handle_bus_reset(struct fw_card *card, int node_id, int generation,
 {
 	struct fw_node *local_node;
 
-	might_sleep();
-
 	trace_bus_reset_handle(card->index, generation, node_id, bm_abdicate, self_ids, self_id_count);
 
-	// Disable bus management work during updating the cache of bus topology, since the work
-	// accesses to some members of fw_card.
-	disable_delayed_work_sync(&card->bm_work);
-
 	scoped_guard(spinlock, &card->lock) {
 		// If the selfID buffer is not the immediate successor of the
 		// previously processed one, we cannot reliably compare the
@@ -501,8 +495,6 @@ void fw_core_handle_bus_reset(struct fw_card *card, int node_id, int generation,
 		}
 	}
 
-	enable_delayed_work(&card->bm_work);
-
 	fw_schedule_bm_work(card, 0);
 
 	// Just used by transaction layer.