firewire: core: optimize Topology Map creation

[pandora-kernel.git] / drivers / firewire / core-topology.c

diff --git a/drivers/firewire/core-topology.c b/drivers/firewire/core-topology.c
index fddf2b3..9a5f38c 100644 (file)
--- a/drivers/firewire/core-topology.c
+++ b/drivers/firewire/core-topology.c
@@ -28,9 +28,9 @@
 #include <linux/module.h>
 #include <linux/slab.h>
 #include <linux/spinlock.h>
-#include <linux/string.h>
 
 #include <asm/atomic.h>
+#include <asm/byteorder.h>
 #include <asm/system.h>
 
 #include "core.h"
@@ -510,13 +510,16 @@ static void update_tree(struct fw_card *card, struct fw_node *root)
 static void update_topology_map(struct fw_card *card,
                                u32 *self_ids, int self_id_count)
 {
-       int node_count;
+       int node_count = (card->root_node->node_id & 0x3f) + 1;
+       __be32 *map = card->topology_map;
+
+       *map++ = cpu_to_be32((self_id_count + 2) << 16);
+       *map++ = cpu_to_be32(be32_to_cpu(card->topology_map[1]) + 1);
+       *map++ = cpu_to_be32((node_count << 16) | self_id_count);
+
+       while (self_id_count--)
+               *map++ = cpu_to_be32p(self_ids++);
 
-       card->topology_map[1]++;
-       node_count = (card->root_node->node_id & 0x3f) + 1;
-       card->topology_map[2] = (node_count << 16) | self_id_count;
-       card->topology_map[0] = (self_id_count + 2) << 16;
-       memcpy(&card->topology_map[3], self_ids, self_id_count * 4);
        fw_compute_block_crc(card->topology_map);
 }