firewire: optimize gap count with 1394b leaf nodes

Table-based gap count optimization cannot be used if 1394b repeater PHYs
are present.  But it does work with 1394b leaf nodes.

Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Signed-off-by: Kristian Høgsberg <krh@redhat.com>

1 files changed, 5 insertions, 2 deletions

diff --git a/drivers/firewire/fw-card.c b/drivers/firewire/fw-card.c
index 9eb1edacd825..0aeab3218bb6 100644
--- a/drivers/firewire/fw-card.c
+++ b/drivers/firewire/fw-card.c
@@ -336,8 +336,11 @@ fw_card_bm_work(struct work_struct *work)
         }
 
  pick_me:
-        /* Now figure out what gap count to set. */
-        if (card->topology_type == FW_TOPOLOGY_A &&
+        /*
+         * Pick a gap count from 1394a table E-1.  The table doesn't cover
+         * the typically much larger 1394b beta repeater delays though.
+         */
+        if (!card->beta_repeaters_present &&
             card->root_node->max_hops < ARRAY_SIZE(gap_count_table))
                 gap_count = gap_count_table[card->root_node->max_hops];
         else